198 CYPRAHID A. 
part of the columella. C. lynx, Linn. (1xi, 98). C. tégris, Linn. 
Gai 92)- 
ARICIA, Gray. Characterized by the flattened base and thick- 
ened callous margins of the last whorl, and gibbous back. C. 
Arabica, Linn. (1xi, 100). C. moneta, Linn. (1xi, 1). 
CYPRHOVULA, Gray. Pyriform, oval, ventricose; surface cov- 
ered with revolving strie. 2 sp. Cape of Good Hope. C. 
Capensis, Gray (xi, 4, 5). 
GASKOINIA, Roberts. (Pseudocassis, Pictet.) Form of Luponia, 
aperture without teeth. One recent species; and a cast. Cre- 
taceous; Europe. C. edentula, Sowb. (1xi, 2, 3). 
Troschel adopts the genera Cyprea and Aricia, and proposes 
the following subgeneric groups, which have not been adopted 
because the species vited as typical may be mostly connected by 
other species having intermediate characters. 
Cyprea— 
Subgenus Talparia. C. talpa, Linn. 
. Tigris. C. tigris, Linn. 
ie Lyncina. C. lynx, Linn. 
° Mauritia. C. Mauritiana, Linn. 
Aricia— 
Subgenus Erronea. C.errones, Linn. 
a Erosaria. (C.erosa, Linn. 
4 Monetaria. C. moneta, Linn. 
TRIVIA, Gray. (Coccinella, Leach.) Small shells with striz 
extending over the back, where they are frequently interrupted 
by an impressed dorsal sulcus. 45 species, one of which inhabits 
the temperate seas of Northern Europe. C. quadripunctata, 
Gray (lxi, 6,7). ‘It is surprising to see with what facility the 
expanded animal of Trivia withdraws itself—foot, mantle, head 
and tube—through the narrow opening of the shell (Clark’s 
Ms.). Like Buccinum undatum it continually discharges an 
immense quantity of clear slime. Couch says that it often gets 
into crab-pots; so that it seems to be fond of all kinds of animal 
food.” —J EFFREYS. 
PUSTULARIA, Swainson. Back with rows of pustules proceeding 
from the dorsal sulcus, both lips ribbed clear across. C. pustu- 
lata, Lam. (1xi, 8, 9°. 
EPONA, H. and A. Adams. Globular, produced at the extrem- 
ities; lips more less striated across. (.cicercula, Linn. (1xi, 
10, 11). 
[ Erato, Risso. 
This group, which I have placed in Marginellide (p. 172), may 
belong here; it is somewhat closely related to Trivia, through 
its sculptured species, and (apparently) in dentition. ] 
