1 882.] American Work on Recent Mollusca in 1881. 961 



(of Lea's types of Hippagus) is thicker and the umbones more 

 prominently developed and spirally twisted than in Crenella, 

 while on the possibly eroded hinge line he observes no crenula- 

 tions. In general, however, these would hardly be taken to be 

 " sufficient differences to warrant a generic separation." 



Bland, in the Annals. N. Y. Acad. Sci. (11., pp. 1 15-16), describes 

 (with a figure) a somewhat remarkable new species of Triodopsis 

 (7! levettei Bid.) from the vicinity of Santa Fe, New Mexico. In 

 the same publication (pp. 127-28 with cut) he has an article en- 

 titled "Notes on Macroceramus kiencri Pfr., and M. pontificus 

 Gld.," in which he figures the former (from types) and comes tothe 

 conclusion that the two are distinct, and that M. kieneri Pfr., 

 is not a member of the fauna of the United States. 

 • Geo. W. Harper describes and figures (Cin. Journ. Nat. Hist, 

 IV., part 3, p. 258, Oct, '81) Patnli bryanti n. s, from North 

 Carolina, which bears a relation to P. perspectiva such as Helix 

 cumbcrtandiana does to H. alternate. He also figures, with notes 

 upon the species, Hyalina significant Bland. 



Rafael Arango describes (Proc. Acad. Nat. Sci, Philadelphia, 

 1 88 1, pp. 1 5-16) Choanopoma acervatttm, Cylindrella paradoxa, C. 

 incerta, these three illustrated by good cuts, and Ctenopoma nodi- 

 fernm, all new species, together with Ctenopoma unightia/iinu 

 Gundlach, n. sp. These new pulmonates are from Cuba. 



Economic Shell-fisheries and Miscellaneous Notes. — The daily 

 press in this, as in almost every field, gathers good wheat as well 

 as chaff, and, occasionally, articles which would do no discredit to 

 permanent scientific literature. Such of the latter as have fallen 

 under the writer's notice are here mentioned as well as more 

 pretentious documents and reports, as in previous years. 



" The Oyster Industry," by Ernest Ingersoll (Tenth Census, 

 Section x, Fishery Industries, Monograph B, Dept. " 



, Washington, 



This forms one of the 



special monographs on the history and present condition of the 

 fishery industries, by G. Btown Goode, Assistant Director U. S. 

 Nat. Mus, and a staff of associates. It contains descriptive and 

 statistical reports on the oyster industry from Maine to Texas 

 and California ; an account of the natural history of the oyster, 

 a glossary of terms and statistical tables. Six of the plates 

 illustrate the development of the oyster from observations by 

 Professor W. K. Brooks (elsewhere noticed) and the remainder 



