362 BIBLIOGRAPHY OF 1878. 



and criticizes his conclusions.— Dr. Jeffreys adds to the British 

 fauna a species, S. virescens Morelet = S. debilis, Baudon, 

 =var vitrea of .S. putris^ Jeff Next comes under discussion 

 Dr. Westerlund's diagnoses of H. hispida and H. co?idnna, and 

 his synonymy of H. virgata. Dr. Jeffreys changes the name of 

 his Irish specimens of Vertigo, which he had previously called 

 Moulinsimia, to V. LiUjeborgi, and brings forward the true Moii- 

 li?isiana Dupuy, as an addition to the British list, with several 

 localities. Another addition, is Vertigo tumida Westerlund, 

 hitherto in Dr. Jeffreys collection under the name of V. piLsilla 

 var. A note follows on V. angiistior]&K Notes on the synonymy 

 of Clausilia rugosa Drap., and on a reversed specimen of Valvata 

 piscinalis MiilL, concludes the paper. 



Leidy (Prof. Jos., M.D.) — Remarks on Mactra.— Proc. Acad. 



Nat. Sci. Philad. 1878, pp. 332 and i'^'^. 



The note has reference to M. solidissima, the Beach-clam, 

 frequent on the sandy coast of New Jersey,; and to its numerous 

 enemies, especially Natica heros; also to the diatoms which form 

 its food. 



Leidy (Prof. Jos., M.D.)— On Donax fossor. — Proc. Acad. 

 Nat. Sci. Philad. 1878, pp. 382 and 383. 



This shell, known as the " Digger" was abundant at Cape 

 May, N. J., when Prof. Leidy made the observations in this note 

 upon its habits and its parasites (a species of Fluke, &c.) 



Lewis (James, M.D.) — On Unio subrostratus Say. — Proc. 

 Acad. Nat. Sci. Philad. 1878, p. 273. 



The author's endeavour is to dispel the obscurity which has 



been thrown round this shell by the influence of trifling errors. 



Lockington (W. N.) — Walks round San Francisco. No. 

 111. Lake Honda and Seal Rock. — Amer. Nat, Dec. 

 187 1, vol. xii., pp. 786 to 793. 



Includes notes on freshwater and marine moUusca. 



