430 American Work in the Departinent of [June, 
losa Binn. and Bl.; Szmpulopsis corrugatus Guppy; Bulimulus 
schiedeanus Pfr.; B. immaculatus Ad.; Macroceramus inermis 
Gundl.; Cylindrella Chemnitziana Fér.; Omalonyx felina Guppy 
(united by Binney and Bland to O. unguis); Arionta intercisa Binn.; 
and Vitrina latissima Lewis, which is erected into a new genus 
(p. 333) under the name of Vitrinizonites. It is related to Vitrina 
and Zonites, but differs by satisfactory characters. For a new spe- 
cies of slug from Natal, Africa, the (preoccupied) name of Chlamy- 
dephorus (rightly Chiamydophorus) is proposed, the species taking 
the name of Gibbonsii after its discover. Pupa cincinnatiensts 
Judge, is said to be a synonym of P. contracta Say, and Tectula 
lincta Lowe, from Madeira, is said to be viviparous. 
These notes are followed by systematic references to the notes 
on various species of Mollusks in regard to which Mr. Binney 
has published anatomical observations or figures; by a complete 
bibliographical list of Mr. Binney’s numerous contributions to 
science; and by a useful list of the known genera of slugs with 
their generic characters as far as they could be ascertained. 
Mr. Binney has also contributed to the Annals of the New 
York Academy of Sciences, 1, No. 9, pp. 257-262, with Pl. xI 
(May 9, 1879), a paper on the jaw and lingual dentition of certain 
Costa Rican land shells collected by the late Dr. Wm. M. Gabb. 
He describes anatomical features of Limax semitectus ? Meerch, 
Bulimulus irazuensis Angas, and of undetermined species of 
Glandina, Helix and Tebennophorus, together with two new 
genera and species, Velifera gabbi (allied to Helicarion) and Crypto 
strakon (mel. Cryptostracum) gabbi, a curious slug with a con- 
cealed rudimentary shell and teeth resembling those of Poly- 
gyra, etc. 
The first essay toward a really scientific study of our American 
Nudibranchiata, is contained in a paper contributed by Dr. R. 
Bergh, of Copenhagen, to the Proceeedings of the Philadelphia 
Academy of Natural Sciences for 1879, pp. 71-132, “On the 
nudibranchiate gasteropod Mollusca of the North Pacific ocean, 
with special reference to those of Alaska,” Part 1, pl. =v. This 
paper is almost wholly anatomical, and by the acknowledged 
highest living authority on the subject. Twenty-seven species 
are ‘considered, of which two-thirds are new and most of the | 
others are for the first time adequately characterized. The dis- 
tribution of the North Pacific species is discussed, and the genera 
