OF C'ONCHOLOGY. 171 



The new species are : — 



Terebratula rJwmbea, Phil. Patagonia. 



" lupinus, " Loc. ? 



Anomia rubella, " China. 



JEnigma reticulatum, Koch. Philippines. 



" convexum, " Loc. ? 



" cori'ugatum, " Sandwich Isles. 



Ostrea dentata, Kiister. East Indies. 



" Chilensis, Phil. Chili. 



" semiplieata, Kiister. Sandwich Isles. 



Reisen und Forschungen J 1m Amur-Lande In den Jahren 1854 — 



1856. By Da. Leopold,! von Schrenck. Vol. 2, Part 3d. Mollusca of 

 the Araoor Country and North Japonic Seas. 4to, pp. 259 to 947, with 

 17 colored plates. St. Petersburg, 1867. 



This very large and exhaustive treatise comprises two parts ; 

 the 1st, Special Part, contains descriptions and observations on 

 the species ; and the 2d, or General Part, contains physico- 

 geographical observations on the North Japonic Sea and its spe- 

 cies, and the numerical distribution and general characters of 

 the fresh-water and land shells. 



The descriptions are careful, and the remarks full and to the 

 point. A large number of novelties are first introduced to sci- 

 ence by our author, but, with a few exceptions, we have already 

 given their names in reviewing the Bulletin of the Imperial 

 Academy of St. Petersburg. 



M. Schrenck changes the name of Turcica monilifera, Adams, 

 to Troehus Adamsianus, Schrenck. He remarks that the genus 

 Turcica rests upon the solitary character of distinction furnished 

 by the spirally contorted columella, — a distinction that is not 

 sufficient when unsupported by other characters, — and that 

 therefore the species merges into Troehus ; and as there is a T. 

 monilifera, Lamarck, he is compelled to change the name of 

 Adams' species. This is, in our opinion, a little too much con- 

 servatism, and will scarcely be acquiesced in by other concholo- 

 gists. A very large proportion of the marine mollusca described 

 in this work are well-known Californian, and even Panamic spe- 

 cies, and generally their vast range of distribution on both sides 

 of the North Pacific is now first made known ; a considerable 

 number of species are also circumpolar, including among these a 

 number of New England shells, several of which are now first 

 ascertained to be true Arctic species. Of the land shells, the 

 principal appear to be either Indian or European, and the same 

 admixture occurs with the fresh-water species : the Lymnoeidae 

 being principally European, the Unionidce partly of European 



