Maintenance of rattlesnakes in captivity / by James B. Murphy and Barry L. Armstrong.

no.3 (1978)

Edward H. Taylor : recollections of an herpetologist / Edward H. Taylor ... [et al.].

no.4 (1975)

The natural history of Mexican rattlesnakes / by Barry L. Armstrong and James B. Murphy.

no.5 (1979)

The flora homoeopathica :or, illustrations and descriptions of the medicinal plants used as homoeopathic remedies /by Edward Hamilton.

1853 v. 2

The flora homoeopathica :or, illustrations and descriptions of the medicinal plants used as homoeopathic remedies /by Edward Hamilton.

1852 v. 1

Differentiation of the sibling species Biomphalaria occidentalis and Biomphalaria tenagophila by the electrophoretic patterns of their hemoglobin

A simple and rapid method for differentialing the sibling species Biomphalaria tenagophila and Biomphalaria occidentalis by agarose gel electrophoresis (AGE) is described. Snail hemolymph is used as the test sample and the red colaration of the hemoglobin fraction permits visualization of the migration patterns without resorting to specific stains. Moreover, hemolymph samples may be obtained without killing the snail, thus permitting its use for other studies for breeding.

Prospects for a nonliving vaccine against Schistosomiasis based on cell-mediated immune resistance mechanisms

We have designed a vaccine model based on induction of cell-mediated immunity and shown that it protects mice against Schistosoma mansoni infection. Mice are immunized by intradermal injection with schistosome antigens plus BCG. Resistance is dependent on the route of antigen presentation and the adjuvant chosen. The pattern of resistance correlates with sensitization of T lymphocytes for production of gamma interferon, a macrophage activating lymphokine that stimulates the cellular effector mechanism of protection. Purified schistosome paramyosin, a muscle cell component present in soluble parasite antigenic preparations, is immunogenic for T lymphocytes and induces resistance when given intradermally with BCG. It is likely that this protein, and possibly other soluble molecules that are released by the parasites of a challenge infection, induce a cellular inflammatory response resulting in larval trapping and/or killing by activated macrophages. These results verify the feasibility of a vaccine against schistosomiasis based on induction of cell-mediated immune resistance mechanisms.

Uma nova espécie de Farrimyia dodge, 1965 (Diptera, Sarcophagidae)

The male of Farrimyia lopesi, a new species from Maracaí island, Uraricoera river, Roraima, Brazil is described and illustrated.

Redescription of Nomimoscolex piraeeba Woodland, 1934 (Cestoda, Proteocephalidea), from the Amazon catfishes, Brachyplatystoma spp. with proposal of synonyms and invalidation of Endorchiinae and Endorchis

The proteocephalid species Nomimoscolex piraeeba Woodland, 1934, N. dorad (Woodland, 1935) and Endorchis piraeeba Woodland, 1934, from Brachyplatystoma spp., South American silurid fishes, are critically revised. It is concluded that they concern to one species, N. piraeeba. The Endorchiinae, a subfamily of Monticelliidae, and genus Endorchis are invalidated herein. The valid species of Endorchiinae, belonging to genus Muzophorus, M. admonticellia Woodland, 1934, M. pirarara Woodland, 1934 and M. woodlandi Rego, 1984, are transferred provisionally to Zygobothriinae.

El Raiffesianismo español: cooperativismo agrícola confesional de crédito en España 1890-1934

La difusión del cooperativismo agrario de crédito en España (1890-1934) se realizó bajo distintas orientaciones ideológicas y económicas. El trabajo se centra en reconstruir la información estadística dispinible para ofrecer una imagen económica de las principales variables que permitan describir la evolución del fenómeno a lo largo de la cronología seleccionada. Se realiza un considerable esfuerzo en el análisis de funcionamiento financiero de las cajas rurales ligado a otros aspectos sociopolíticos que influyeron en su desenvolvimiento, para analizar el éxito relativo de un proceso de adaptación de los modelos cooperativistas de crédito alemanes a la realidad agraria española, como sucedió en otras periferias europeas.

Planorbis meridaensis Preston, 1907 (Gastropoda: Planorbidae), a synonym of Biomphalaria prona (Martens, 1873)

Biomphalaria prona from Lake Valencia, Venezuela (type locality) has a polymorphic shell wich in the great majority of specimens is wider, with fewer rapidly expanding whorls, the outer one subcarinate on the left side and more or less strongly deflected leftward. Besides those modal forms there are little frequent variants characterized by narrower shell with less rapidly expanding, regularly curved whorls directed forward. Recent studies have shown that such variants constitute the predominant shell phenotype in extralacustrine populations, but are anatomically and biochemically indistinguishable from the modal class of the Lake. In the present paper it is demonstrated that the nominal species Planorbis meridaensis Preston, 1907, from Mérida, Venezuela, is identical with B. prona (Martens, 1873) of wich it must be considered a junior synonym.