710 American Work in the Department of [ September, 
In the American Naturautist for March (p. 214), Mr. Lock- 
wood notes a case of-extreme vitality in a specimen of Helix 
aspera (aspersa ?), which lived thirteen months without food. 
Geographical and Bathymetrical Distribution and Catalogues.— 
A valuable contribution to our knowledge of the geographical dis- 
tribution of invertebrates on the north-west coast of America, is 
made by Mr. J. F. Whiteaves in the ‘“‘ Report of progress of the 
Geological Survey of Canada, 1878-9,” pp. 190 B—205 B, Mon- 
treal, May 1, 1880; his paper being entitled “ On some Marine In- 
vertebrata from the Queen Charlotte islands.” It is based on 
collections made by Dr. G. M. and Mr. Rankine Dawson in the 
summer of 1878, on the eastern and northern coasts of the group. 
Macoma carlottensis Whiteaves, a species much resembling J. 
ividescens Sby., and Lepton rude (Dall MS.) are described and 
illustrated by good woodcuts. Many species in the list have 
hitherto been known only from more southern localities. The 
depth and exact locality are precisely indicated; the mollusk 
fauna, as might be expected, is distinctively Oregonian in charac- 
ter. Several new species of Echinoderms are described by 
Professor Verrill, and two species of corals, a Balanophyllia and 
Paracyathus are noted, the latter of which was only previously 
known from Monterey, Cal. 
In the Proceedings of the Philadelphia Academy for the current 
year (pp. 40-127, pls. 1-8, rx-xv1), Dr. R. Bergh, of Copenhagen, 
concludes his memoir on the Nudibranchiate Gasteropod Mol- 
lusca of the North Pacific ocean, with special reference to those 
of Alaska. This, with Part 1, noticed in our last report, com- 
pletes the revision of the species known to exist in that region, 
and is, without doubt, the most important contribution to the 
subject ever published in America. Too crowded with anatomi- 
cal and other details to admit of intelligible condensation in the 
form of an abstract, it may be mentioned that the species de- 
scribed by Cooper and others are here for the first time referred 
to their true systematic relations, and enumerated under their 
proper genera. Several European species are recognized, and 
others are represented by closely allied forms, nearly all are sub- 
jected to minute microscopic dissection and appropriately figur ed 
in detail from camera lucida drawings. The new species described 
in the second part, are Akiodoris lutescens, Aleutian islands ; 
Lamellidoris (var.) pacifica, Bering sea; L. varians, Aleutians, 
