Mollusca, hy Edgar A. Smith. 421 



Ptekopoda. 

 Peracle diversa^ Monterosato. 



Dead shells dredged in 1000 fath. 



No full description of this species has yet appeared ; indeed 

 all the information respecting it which has been given is that it 

 diflfers from Peracle reticulata^ d'Orb., in having a shorter spire 

 and a deeper and denticulate suture. To these distinguishing 

 characters may be added that of the columella being surrounded 

 by a double keel instead of a single one as in P. reticulata. 

 The surface of fresh specimens has the same epidermal reti- 

 culation in both species. 



I liave not yet had an opportunity of examining the types 

 of Pelseneer's P. bispinosa, but I have a strong suspicion 

 that it is the same as P. diversa. Still, as no reference 

 is made to the keel which circumscribes the columella (nor is 

 it depicted in the figure), I must refrain from expressing a 

 positive opinion. 



Cavolinia [Diacria) trispinosa^ Lesueur. 

 Dead shells in from 250 to 1000 fath. 



Gastropoda. 

 Buccinum undatum^ var. 



From 55 fath. 



The single young specimen, about an inch long, is pecu- 

 liarly fusiform, whitish, without colour-markings, and clothed 

 with a delicate fibrous epidermis. Only the feeblest indi- 

 cation of oblique plication is discernible. Adult specimens of 

 this variety were obtained by the ' Porcupine ' expedition off 

 the south of Ireland in 113 and 180 fath., and off the west 

 coast in 90 and 159 fath. 



Sipho {Siphonorhis) fusiformisj Broderip. 



From 110 fath. 



The single specimen obtained is very fine, and considerably 

 exceeds the dimensions usually assigned to this shell. Its 

 total length is b2 millimetres ; aperture 23. 



The ' Porcupine ' expedition obtained examples off the west 

 and south of Ireland in from 90 to 725 fath. The species 

 occurs in deep water off the Norwegian coast, and was also 

 dredged by the ' Travailleur ' north of Spain in from 277 to 

 731 fath. {Jefreys, MSS.). 



Columhella [Anachis) halioietij Jeffreys. 

 From 1000 fath. 



