the West Coast of Davis's Strait. 331 



thin and of a horny appearance ; and small as it is has much the 

 general habit of Fusus Islandicus, though very much shorter in 

 the canal. Perhaps it is still a better miniature representation 

 of F. Koninckii of Nyst, a tertiary fossil from Baesele. 



Fusus Fabricii, Beck sp. 



Trophon Fabricii, Beck, in Moller's Index Mollus. Grcenl. p. 14. 



Tritonium craticulatum, O. Fabr. p. 400. 



Murex borealis, Reeve, Conch. Icon., Murex, pi. 30. f. 145. 



A single specimen of this delicate and beautiful species oc- 

 curred. It agrees very accurately with the description in the 

 e Fauna Grcenlandica % excepting that it is considerably larger, 

 measuring three-fourths of an inch in length ; it is stated, how- 

 ever, in the ' Index Molluscorum Groenlandise ' to be fifteen lines 

 long. 



The Murex borealis of Reeve, as represented in the ' Concho- 

 logia Iconica,' is a very good portrait of the shell brought by 

 Messrs. Warham and Harrison ; if therefore I am right in placing 

 it with the F. Fabricii, the Murex borealis must sink into a 

 synonym. 



Fusus turricula, Montagu sp. 

 Murex turricula, Mont. Test. Brit. p. 262. t. 9. f. 1. 



The collection contains a single, dead, much eroded specimen 

 of this species. 



Pleurotoma decussata } Couthouy. 



Pleurotoma decussata, Couth., Bost. Journ. Nat. Hist. vol. ii. 

 p. 183. pi. 4. f.8. 



A single specimen was procured : it is three-eighths of an inch 

 long and two-tenths of an inch broad. It agrees pretty accurately 

 in general form with the Pleur. decussata of Couthouy, as figured 

 and described in Gould's ' Report on the Invertebrata of Massa- 

 chusetts'; but it is represented more turreted than the specimen 

 from Davis's Strait, and also more reticulated. I think it pro- 

 bable, as suggested by Dr. Gould, that the Pleur. reticulata of 

 Brown belongs to the same species. 



Velutina zonata, Gould. 

 Velutina zonata, Gould, Report on the Inverteb. of Massachu- 

 setts, p. 242. 



A fine large individual of this shell was obtained ; it is five- 

 eighths of an inch long and the same broad. It wants the zones 

 spoken of by Dr. Gould, and differs slightly in other particulars 

 from his description. 



This is nearly related to the V. undata of Smith, a fossil spe- 

 cies procured from the glacial beds of the Clyde, but is, I am in- 

 clined to believe, distinct. The shell from Davis's Strait is thinner, 



