Chaster — On the Mollusca obtained by the R.I. A. Cruises. 25 



Yar. L^vis, Pennant, v. 



Log 62. 

 Patella vulgata, Linne. 



Station YIII. Logs 35, C. 

 [Teachtdekmon crN-EEETJS, Linne, sp. (Chiton), = marginatus, Pennant. 



Log 62.] 

 LEPrDOPLETjEus ONYX, Spengler, sp. {Chiton). 



[Station VIIL] Logs 30, [44]. 

 AcANTHOCH^TES EAScicuLAEis, Linne, sp. ( Chiton). 



Station VIIL 

 [ToisriCELLA EUBEA, Linne, sp. [Chiton). 



Station YIII.] 

 [Neomenia (?caeinata, TuUberg). 



Nympli Bank. A. E. Nichols.] 

 DENTALniM ENTALTs, Linne. 



[Stations L, IV.] Logs 9, 11, 12, 17, 18, 22, 24, 29, 30, 

 33, 34, [44 (ofe Dursey Head; depth, 108 fathoms)], 55, [56 

 (off Dursey Head ; depth, 93 fathoms)], 57 ; depth, 25 to 808 

 fathoms. 

 D. VTJLGAEE, Da Costa, sp. [Bentale), = tarentimtm, Lamarck. 



Logs 18, [56 (off Dursey Head ; depth, 93 fathoms)]. 

 D. AGILE, M. Sars. 



Log. 67. Three fine specimens, two containing the animal. 

 Entalina QuiNaTJANGULAEE, Forbcs, sp. {Dentalim). 



Logs 57, 67. Depth, 100 to 370 fathoms. A few examples, 

 mostly fragmentary. 

 PuLSELLUM LOEOTENSE, M. Sars, sp. [Siphonochntalium). 



Logs 9, 11, 12, 16, 17, 18, 21, 28, 30, 33, 34, 42, 54, 55, 

 57, 63, 67 ; depth, 10 or 20 to 808 fathoms. This species, 

 though so widely distributed in the district as regards both 

 area and depth, only occurs plentifully when a depth of some 

 seventy fathoms is reached. Most of the specimens belong to 

 the form which M. Sars described as specifically distinct under 

 the names of Siphonodentalium affinis. Mr. J, T. Marshall, 

 though he retains the specific distinction, declares that one 

 form merges into the other. So trne is this, that it is quite 

 impossible to separate specimens when dealing with them in 

 hundreds, as in the case of these Irish examples. The name 

 affinis must, therefore, be relegated to varietal rank. 



