114 BIBLIOGRAPHY OF 1877. 



Mr. Binney also contributes a paper on the jaw and lingual 

 dentition of Costa Rican land shells to the Annals of the New- 

 York Academy of Sciences, i No. 9, p. 257 — 262. In it he 

 describes two new genera and species Velifera Gabbi (allied to 

 Helicarion) and Cryptostrakon gabbi, a curious slug with a con- 

 cealed rudimentary shell and teeth resembling those of Polygyra. 



Dr. R. Bergh of Copenhagen, in the Proc. Ac. Nat. Sci. of 

 Philad. for 1879, contributes a paper "On the Nudibranchiate 

 Gastropod Mollusca of the North Pacific Ocean, with special 

 reference to those of Alaska," part i., pis. i.-viii. 



Twenty-seven species are considered. Two-thirds are new, 

 and most of the others were previously insufficiently characterized 

 Most of the forms are from Alaska, and the paper is based for the 

 most part on the collections of Mr. W. H. Dall. 



Mr. W. H. Dall in Proc. of U.S. Nat. Mus., gives "A report 

 on the Limpets and Chitons of the Alaskan and Arctic regions, 

 with descriptions of genera and species belived to be new," pp. 

 281 to 344. 



The paper is a summary of all that is known of the anatomy 

 and development of the Chitonid^. The table gives the radula 

 of 45 species belonging to 33 genera. The renal pore described 

 by Von Ihering but not found by Dall, appears to be a miscon- 

 ception of Von Ihering's. 



Prof. Verrill describes a new Cephalopod and several 

 Gastropods from E. coast of North America. 



Mr. Whiteaves in the Canadian Naturalist, vol. viii., n.s., 

 No. 8, has a paper "On some marine invertebrata from the West 

 Coast of North America," containing a list of mollusks from the 

 coasts of British Columbia, one of which, Cardium Richardsonii, 

 is described as new. The fauna is Oregonian in character. 



Prof Wetherby in "Notes on Limnseidse" previously men- 

 tioned, describes as new Helisoma Duryi from Florida, and 



