First recorded bloom of Navicula Bory in a mangrove habitat of Karachi

Discolouration of sands and other marine substrata caused by benthic diatoms have been reported by Aleem (1950) Eaton and Moss (1975), Sullivan (1980), Maple (1983), Navarro (1983) and Wah and Wee (1988). However, this is for the first time such a phenomenon is being reported from a mangrove habitat of Karachi. It was caused by a pennate diatom Navicula cancellata Donkin.

A Review of the parasitic copepods of fish recorded from Ceylon with description of additional forms

The beginning of our knowledge of the copepods parasitic on fish from Ceylon is due to Bassett-Smith (1898 a) who, in a paper on "Further New Parasitic Copepods found on Fish in the Indo-Tropical Region", included seven species collected at Trincomalee and Colombo. Later in the same year, in a paper on "Some New or Rare Parasitic Copepods from the Indo-Tropical Region", he (Bassett-Smith, 1898 b) included three more species from Ceylon. Soon after, more of these parasites were obtained from Ceylon during Herdmann's investigation of the Pearl Banks. From this collection, one lot consisting of eleven species was described by Thompson and Scott (1903) and a second lot consisting of seven species was described by Wilson (1906). At that stage the number of species recorded from Ceylon made up to a total of twenty-eight and there the matter rested for another quarter of a century until, quite by chance, while collecting marine animals on a reef, Mr Kirtisinghe came across a newly dead half-beak with a learned parasite projecting from its body. Since then, in a number of occasional papers (Kirtisinghe, 1932-35, 1937, 1950, 1956, 1960) he has described thirty-eight more species of parasitic copepods from Ceylon. However, his collection included many more species which were put aside for later attention. In the present paper, while dealing with those forms in his collection which he has not recorded or described earlier, he has put together all the known forms of parasitic copepods of fish from Ceylon. A list of the host fishes with their respective parasitic copepods is also provided, types of new species, at present in the author's private collection, will be deposited in the Fisheries Department, Colombo, Ceylon.

Rotifera from Sri Lanka (Ceylon) 3. New species and records with a list of Rotifera recorded and their distribution in different habitats from Sri Lanka

In two previous papers, the Eurotatorian fauna of Sri Lanka has been systematically dealt with. Description of 104 species is given in the previous papers. In the present study an additional twenty-two species are described. Of these two are new. The composition of the Sri Lanka Rotifera is discussed in relation to the fauna of other parts of the world. The distribution of the species in different types of habitats is studied on the basis of samples. A complete list of all Rotifera recorded from Sri Lanka so far is given for easy reference. Examples of localities where species were collected are also given.

AuditoI．y eVoked potentials recorded in monkeys with hallucinatory—like benaVlorS lndUCed DV brom0CnDnne

澳隐亭及多巴胺受体D2激动剂会影响除人以外其它灵长类动物的一系列行为，特别是与运动和 心理活动相关的行为，比如动物会表现出抑制性行为及幻觉样行为。除药物外，快速眼动睡眠(REM)机制的紊 乱也可导致幻觉。打乱清醒、REM及非快速眼动睡眠(NREM)的规律可引起一系列精神病症状。方法当动物 处于清醒，NREM和REM及药物导致的类精神病状态时，同时记录五个皮层脑区的听觉诱发电位，从而研究 对比不同状态下听觉诱发电位的变化。结果在幻觉状态及REM期，前额叶背外侧皮层记录到的潜伏期为250 ms的诱发电位成分出现波峰到基线的相位翻转(PBA250)，说明幻觉状态及REM在前额叶背外侧皮层有类似的调 节机制。结论在前额叶背外侧皮层记录到的N250可以用来判断幻觉样行为是否出现，这表明前额叶背外侧皮 层可能同幻觉样行为最相关。

Three newly recorded species of Microcystis (Cyanophyta) from China

About 50 species of Microcystis so far have been reported in the world, and 19 species were described in China. During our recent investigations for water-bloom forming blue-green algae in China, a diverse group of Microcystis species occurring in some waters can be easily observed. Among these species, some have never been described in China. The present paper reported three newly recorded species of Microcystis: M novacekii (Komdrek) Compere 1974, M smithii Komdrek & Anagnostidis 1995, and M botrys Teiling 1942.

Two genera of freshwater Dinophyta newly recorded from China

A re-examination under the phase contrast microscope of a collection made in a small lake in Xizang, China, which had been previously referred to Glenodinium gymnodinium Penard, has shown that the cell wall is composed of numerous usually hexagonal platelets, and thus the species should be a relatively common member of the genus Woloszynskia, namely W. tenuissima (Lauterborn) Thompson. Tetradinium intermedium Geitler is an immobile species collected from a small pond in Wuhan City, Hubei Province, China. It was attached on filaments of an Oedogonium species. Both genera are newly recorded in China.

Rotifera recorded from China, 1893-1997, with remarks on their composition and distribution

A search of the literature on rotifers recorded from China, includes today 477 valid species names and 42 subspecies or infrasubspecific variants in 84 genera and 28 families recorded since 1893. Chinese rotifera research is reviewed, and all recorded species are listed with current taxonomic status and their first localities in China. Most of the named taxa are widely distributed or cosmopolitan, with only a small number (about 3%) possibly restricted to China. This fauna exhibits 15 endemic taxa. The composition and distribution of Chinese Rotifera are briefly analyzed. It is likely that considerably more rotifers remain to be described from China as further study to be carried on and taxonomic resolution improves.

The earliest archaeobiological evidence of the broadening agriculture in China recorded at Xishanping site in Gansu Province

IEECAS SKLLQG

Mid-Holocene climate variations recorded by palaeolake in marginal area of east Asian monsoon: A multi-proxy study

IEECAS SKLLQG