South American marsh rats, Genus Holochilus, with a summary of sigmodont rodents.

v.37:no.24(1955)

Notes on Central American and Mexican coral snakes, by Karl P. Schmidt.

v.20:no.20(1936)

New Central American frogs of the genus Hypopachus, by Karl P. Schmidt.

v.24:no.1(1939)

Some remarkable shells of a South American fresh-water mussel [by] Fritz Haas

v.31:no.3(1945)

The brains of the South American marsupials Caenolestes and Orolestes, by Jeannette Brown Obenchain.

v.14:no.3(1925)

The South American mice referred to Microryzomys and Thallomyscus, by Wilfred H. Osgood.

v.20:no.1(1933)

Diet of the South American frog Leptodactylus ocellatus (Anura, Leptodactylidae) in Uruguay

The diet of Leptodactylus ocellatus (L., 1758) was studied in specimens collected at Maldonado Department (Uruguay), where monthly surveys were made between August 1998 and March 2000. A total of 143 frogs were collected, measured, sexed, and dissected, to assess stomach contents. The anurans were grouped into three age classes and four categories (considering sex and capture date). The trophic amplitude for each age class and sex-season category was quantified using Shannon-Weaver Index, and the trophic niche overlap between ages and categories by using the Pianka Index. Comparisons among treatments were made by G-tests. The most important prey items were coleopterans (IRI = 2547), and significant correlations were found between predator and prey sizes. The major differences on diet composition were found between extreme age classes (froglets and adults). Significant differences were also detected between sexes in the cold season but not in the warm season. Any of these changes in diet may be related with the availability of prey.

Nine new South American rodents, by Wilfred H. Osgood.

v.29:no.13(1944)

Remarks on and descriptions of South American non-marine shells.

v.31:no.46(1951)

Catalogue of North American beetles of the family Cleridae [by] Albert B. Wolcott.

v.32:no.2(1947)

The red ocher culture of the upper Great Lakes and adjacent areas / Robert E. Ritzenthaler, Curator of Anthropology, Milwaukee Public Museum, and George I. Quimby, Curator of North American Archaeology and Ethnology, Chicago Natural History Museum.

v.36:no.11(1962)

Check list of North American water-mites / Rodger D. Mitchell.

v.35:no.3(1954)

New feather-wing beetles from termite nests in the American tropics (Coleoptera ptiliidae)

v.37:no.21(1955)

A generic and tribal revision of the North American Aleocharinae (Coleoptera, Staphylinidae) / Charles H. Seevers ; with additions and annotations by Lee H. Herman.

v.71(1978)

Skull morphometrics of adult male Antartic fur seal, Arctocephalus gazella, and South American fur seal A. australis

The skull morphometrics of adult male Antarctic fur seal, Arctocephalus gazella (Peters, 1875) and South American fur seal, A. australis (Zimmermann, 1783) were investigated using a collection of 45 and 38 skulls, respectively. Eighteen measurements were taken for each specimen. Comparative univariate and multivariate statistical analyses included standard statistics, one-way analysis of variance, principal component analysis and discriminant analysis. Individual variation was relatively high for some variables, as expressed by the coefficient of variation. Skulls of A. gazella were larger than those of A. australis for all but two variables: squamosal jugal suture and rostral length. Both species differed significantly as shown by both univariate and multivariate analyses. The discriminant function correctly classified all specimens. The standardized canonical coefficients showed that the variables which most contribute to the differentiation between species were, in decreasing order, the rostral length, palatal length, palatal width at postcanine 5 and braincase width. The present study corroborates that A. gazella and A. australis are phenotipically distinct species.