Chaster — On the MoUusca obtained hy the R.I. A. Cruises. 13 



E-ETROTOETiNA FuscATA, Chaster. 



Log 39. A single specimen. Though evidently specifically 

 identical with my types from Tangier Bay, the shell from 

 Lough Hyne is rather more flattened than they. It is not a 

 mere reversed monstrosity of SJcenea planorhis, as might at first 

 be supposed. The nucleus of the shell is smaller ; the direction 

 of the lines of growth different, and the shell does not reach 

 more than a third of the size of that species. Owing to its 

 very diminutive size it will probably never be a commonly 

 known shell. 



HoMALOGYEA ATOMTJS, Philippi, sp. {Truncatella). 



Station VIII. Logs 39, 70, A. A good number of fine 

 live specimens from Lough Hyne. 



H. nscHEEiANA, Monterosato. Log 39. A single specimen. This 

 species, so common in many parts of the Mediterranean, has ap- 

 parently not been noticed on our coasts before. Though devoid 

 of the characteristic radiating ribs of S. rota, it is in its other 

 characters more closely allied to that species than to S. atomus. 



H. EOTA, Forbes and Hanley, sp. {SJcenea). 

 Station VIII. Logs 6, 28, 35. 



Jeffeetsia DiAPHAisrA, Alder, sp. {Rissoa ?). F, A single specimen, 

 Alder's change of his original name glalra to diaphana may per- 

 hapsbe allowed to stand, although it was wholly unnecessary, for 

 he had pointed out that his new species was not a true Rissoa. 

 Consequently his original name was valid, even if Brown's 

 Rissoa glahra proved to be a diif erent species, as Alder thought 

 it was when he suggested the alteration of the name. 



Rissoa PAEVA, Da Costa, sp. {Turlo). 



Stations [YIL], YIII. Logs 3, 6, 15, 19, 28, 30, 35, 40, 

 50, 62, 63, 64, A, C, D, E, P. 



Var. INTEEET7PTA, J. Adams, var. {Turlo). Logs 3, 35, 40, 50, 55, 



62, 63, 70, C, E, E. 



E. iNCONSPicTTA, Alder. 



Logs 6, 9, 11, 12, 17, 25, 28, 31, 33, 34, 35, 40, 42, 50, 55, 



63, 70; depth, 4-110 fathoms. 



Var. ALBELLA, LoVGU. 



[Station YIII.] Logs 35, 39, 40, 63, A. Young speci- 

 mens of the var. alhella greatly resemble in form R. pulcher- 

 rima, Jeffreys. 



