Mollusca, by Edgar A. Smith. 421 
PTEROPODA. 
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 
differs 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 have 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. diversu. 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- 
harly 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 (Stphonorbis) fusiformis, 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 52 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 tath. (Jeffreys, MSS.). 
Columbella (Anachis) haliweti, Jettreys. 
From 1000 fath. 
