'Mi PKOCKEDINGS OF THJ] MALACOLOGICAL SOCIETY. 



Ascension ; Tristan da Ciinha ; Bombay. Later Tertiaries of Europe ; 

 also in the Clyde Beds and Quatei'nary of Bohuslan (Jeffreys). 



The following station numbers, apparently relating to the 1870 

 cruise, are also noted on the boxes in the Museum: 1, 6. 11, 14, 15, 

 23. Two dead specimens from Station 17 of the 1870 cruise are 

 referred here with doubt ; they are more slender and may be distinct, 

 but are in too bad condition for description. 



I have examined two specimens from Bombay, presented by 

 Mr. Abercrombie to the Museum ; they are in poor condition, but 

 I am unable to detect any salient characters to separate them from 

 the pi"esent species. 



Cylichna discus, Watson. 



Cylichna discus, Watson: Journ. Linn. Soc, Zool., vol. xvii, p. 319; 



Challenger Rep., Gastropoda, p. 664, pi. xlix, fig. 10; 



Friele & Grieg, Norske Nordhavs-Exped., Moll., pt. iii, 



p. 109. 

 "Porcupine" Expedition, 1870, Stations 16, \la. 

 Distribution. — Culebra I. (Watson) ; jS'orwegian North Atlantic 

 Expedition, several stations at 412-1163 fathoms; "Michael Sars " 

 Expedition to Jan Mayen in 1100 fathoms (Friele). 



Friele & Grieg state that "the specimens from smaller depths, 

 such as at Stations 18, 31, and 87, bore a strong resemblance to 

 C. alha,'''' and I suspect that the two may prove to be varying forms 

 of one species. Jeffreys, however, notes: "Intermediate between 

 C. cylindracea and C. alha, broader than the former and narrower 

 than the latter. Sculpture peculiar to this genus indistinct and 

 scarcely visible. The truncated apex has a coating so slight that 

 there is nearly always a small pore or opening, which is sometimes 

 enlarged by attrition so as to expose the concealed spire." I have 

 found great difficulty in separating the forms, and one specimen from 

 Station 23« of the 1869 cruise, included by Jeffreys in a series of 

 C. alha, may belong here. 



Cylichna (?) elongata (Jeffreys). PL III, Figs. 8, 8«. 



BulUna elongata, Jeffreys: Rep. Brit. Assoc, 1880 (1881), p. 387; 



Ann. Nat. Hist., ser. v, vol. vi, p. 318 ; Pilsbry, Man. Conch., 



vol. XV, p. 394. 



"Porcupine" Expedition, 1870, Stations 16, 17, \1a. 



Jeffreys suggests, and from an examination of the figure given 



I think it may well be so, that this is the Bullina undata, Delia Chiaje, 



of Seguenza (Mem. Ace. Lincei, ser. iii, vol. vi, p. 251, pi. xvi, fig. 9). 



Cylichna Hoernesi (Weinkauff). PI. Ill, Fig. 1. 



Bulla Hoernesi, Weinkauff : Journ, de Conchyl., vol, xiv, p. 238 ; 



Conch, des Mittelmeeres, vol. ii. p. 187. 

 Cylichna cuneata, Tiberi : Journ. de Conchyl,, vol, xvi, p, 180. 

 Bulla conulus, Hoernes nee Deshayes. 



" Porcupine " Expedition. 1870, Stations Yigo Bay, off Cape Sagres, 

 35, 50, 52, 56, Adventure Bank. 



