176 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



560, this agrees with Station 77, but there was no dredging there, 

 only a sounding (cf. Proc, Roy. Soc, vol. xviii, p. 447). 



Bela decussata (Couthouy). 

 Pleurotoma decussata, Couthouy : Boston Journ. Nat. Hist., vol. ii 



(1839), p. 183. 

 Bela decussata, Couthouy : Kobelt, p. 252. 



"Porcupine" Expedition, 1869, Stations 23«, 62, 77. 



Distribution. — Arctic seas and both sides of the North Atlantic. 

 A Post-Tertiary fossil at Bridlington and near Belfast (Jeffreys). 



Jeffreys points out that the Pleurotoma decussata of Lamarck has 

 priority, and suggests the use of the name conoidea, Sars, for the 

 present shell. I am not sufficiently versed in the literature of the 

 numerous Arctic species of Bela to determine what name should be 

 adopted. 



Bela exakata (M oiler). 

 Befrancia exarata, Moller : Index Moll. Gronland, p. 12. 

 Bela turricula, var. exarata, Moller : Kobelt, p. 236, pi. xxxii, fig. 3. 



"Porcupine" Expedition, 1869, Stations 17, 25; 1870, Station 30. 



Distribution. — Arctic seas and both sides of the North Atlantic. 

 Fossil in the English Red Crag (Jeffreys) and in Post-Tertiary deposits. 



The specimens from Station 17 are only fragments. In the 

 identification of the northern forms of Bela I have, as a rule, followed 

 Gwyn Jeffreys. 



The following notes by Jeffreys on the 'type' of Pleurotoma mitnda, 

 Loven, may find a place here : " Compared specimen with description, 

 which is correct. The first and second (apical) whorls are nearly 

 smooth, and obliquely twisted; the third and fourth whorls have 

 each two rows of prominent spiral strife, which are nodulous at the 

 points of intersection by the longitudinal ribs. The shell has 

 a remarkably turreted appearance, and the mouth is shorter in 

 proportion to the length of the spire than in most species of the 

 section Bela. It is a very elegant and solid shell. Its relations are 

 with B. Trevelyana ; but the sculpture is much stronger, and the 

 cancellation more remote." Jeffreys refers to a drawing of this 

 specimen by Mr. Sowerby, but I am unable to trace the drawing, or 

 whether it has appeared in any work. 



Bela (?) macra (Watson). 

 Pleurotoma [Blangelia) macra, Watson : Journ. Linn. Soc, vol. xv, 

 p. 437 ; " Challenger" Rep., Gasteropoda, p. 345, pi. xxiii, fig. 6. 

 Dautzenberg »& Fischer: Mem. Soc. Zool. France, vol. ix, p. 421, 

 pi. xvi, fig. 13. 



"Porcupine" Expedition, 1870, Station 17. 



Distribution. — Off the Azores, in deep water. 



Compared with the Rev. R. B. Watson's type ; one specimen fairly 

 typical, the other apparently belonging to a variety. I am in some 

 difficulty as to the relationship between this form and Defrancia 

 nodulosa, Jeff. The latter form was described from the Mediterranean, 

 and in the original reference the author refers also to specimens from 



