Quarterly /our/ml of ConcJwlogy. 257 



Journal de Conchyliologie, April, 1877. 



Crosse. — Catalogue des MoUusques qui vivent dans le 

 detroit de Behring, et dans les parties voisines de I'Ocean Arctique 

 (Catalogue of the Mollusca of Behring's Straits and the neighbour- 

 ing parts of the Arctic Ocean), pp. loi — 128. 



118 species are enumerated; they are, as is natural, of an 

 Arctic chara.cter. 



Baudon. — IMonographie des Sitccir.ccs fran^aiscs (Mono- 

 graph of the French Succincce — continued), pp. 128 — 198. 



The author gives full descriptions, accompanied by 5 coloured 

 plates of figures, of all the species and varieties of Siiccinea 

 inhabiting France, going, we think, much too minutely into detail 

 for a paper in a journal of general circulation, ^^'ith reference to 

 our notice of the first part (Q. J. C, p. 228) we must no wacknow- 

 ledge that we think that the difference between S. Pfeifferi and S. 

 elegans has been proved. S. acramhleia, however, v.'hich turns out 

 to be Mabille's species, is merely S. Pfeifferi (compare figs. 4 and 

 5 of Plate 7). S. parvula is a var. of S. putris. S. Baudoni cer- 

 tainly differs from 6*. areiiaria ; it is very like the var. parvula of 

 S. putris. Much space is wasted by long lists of references to 

 local catalogues, etc. 



Fischer. — Note sur la sinistrorsite' des coquilles des jeunes 

 Planorhes (Note on the sinistral volution of Planorbis shells), 

 pp. 198 — 200. 



From an examination of embryonal sliclls of P. corneus. the 

 author considers the shell of Planorbis is sinistral. With praise- 

 worthy candour he m.entions the fact of all the spiral shells of P. 

 complanatiis found at Magne'e being dextral. May not the true 

 solution of the question be that some species, or perhaps even as in 

 Aiiipliidroi/iiis, some individuals are dextral and others sinistral ? 



