NOTES ON THE LISTS OF MOLLUSCA. 



Notes on the Lists of Mollusca. 



In preparing the above lists we have, as already stated, taken 

 the latest works by M. Cossmann as our basis ; but we have 

 found it necessary to make several alterations in the nomencla- 

 ture, in addition to those proposed by M. Cossmann since the 

 publication of his Catalogue, The list of Oligocene species is 

 not as complete as we should wish ; but the materials for an 

 efficient revision are not at present available ; we have, however, 

 emended the lists which have been published as far as possible. 



In accordance with their etymology and with the rules of 

 Latin orthography, the names of several genera and species are 

 here written in a manner slightly different from that usually 

 adopted. In making these alterations, as well as in the invention 

 of any new names required, we have benefited by the scholarship 

 of our friend, Mr. F. A. Bather. 



A few of the species, as defined by M. Cossmann, should, we 

 think, be altered. Thus : — 



Xenophora agglutinans (Lam.) is here substituted for X. 

 umbilicaris (Sol.) ; the latter is a recent species, and differs 

 from Barton and other Eocene forms. 



Cerithium cornucopise,Sow.,is restored in place of C. Bedechei, 

 Bayan ; the type of the latter appeared to us, on examination, 

 to be merely a worn specimen of the former species. 



Sycum subcarinatum (Lam.), though regarded by M. Coss- 

 mann as synonymous with S. pirus (Sol.), appears to us to be 

 distinct, and is therefore reinstated. 



Fusus aciculatus. Lam., is referred by M. Cossmann to F. 

 porrectits (Sol.), but a careful comparison with typical speci- 

 mens in the British Museum convinces us that the two are 

 different ; the former is therefore retained as a Paris Basin 

 species. 

 The corrections that have been proposed by M. Cossmann 



since the publication of his Catalogue are as follows : — 



Micreschara, Cossmann, instead oi Escharella, Cossmann, i88S 

 {twn D'Orb, 1852). See Ann. Geol. Univ., t. v. (1889), p. 

 1096. 



Parascutum, Cossmann, instead of Scuiulum, Monterosato, 1877 

 {n07i Tournouer). See Ann. Geol. Univ., t. vi. (1891), p. 

 883. 

 Mr. R. B. Newton, F.G.S., in his " Systematic List of the F. 



E. Edwards Collection of British Oligocene and Eocene Mollusca," 



issued August 22nd, 1891, has made various rectifications of 



certain genera, some of which affect the foregoing list as follows : — 



