257 
mity; ventral nearly straight. The surface of the valves is very rough, 
wrinkled, and beset all over, but especially near the margins, with 
strong spinous lacinise. 
Hab. Tenedos. Mr. Williamson’s collection. 
Genus Cypridina, M.-Edwards. 
1. Cypridina Zealanica, Baird. (PI. XVII. f. 11-13.) 
Carapace valves of an oval form, somewhat flattened, but convex 
in the centre and striated; the strise are numerous, close-set, and 
of a waved appearance. Surface of valves covered with minute punc- 
tations, which probably give origin in the fresh state to short hairs, 
though they are not visible in the dried specimens. The anterior ex¬ 
tremity is slightly narrower than posterior. The whole carapace is of 
a uniform white colour. Natural size one-fourth of an inch long and 
one-fifth of an inch broad. 
Hab. New Zealand. Two specimens were sent to the British Mu¬ 
seum by the Bev. B. Taylor, of Waimati in New Zealand, along with 
a collection of marine and freshwater shells, but without any history 
attached to them. 
2. Cypridina interpuncta, Baird. (PL XVII. f. 8-10.) 
Carapace valves oval. Anterior extremity narrower than posterior; 
the notch near anterior extremity very wide, and its anterior margin 
blunt and projecting in form of a beak straight upwards ; posterior 
extremity obtusely rounded, and terminating near the ventral margin 
in a short blunt point. Dorsal and ventral margins nearly straight 
or slightly arched. The surface of the valves is of a dull white colour, 
and is densely and rather coarsely covered with impressed punctations. 
The carapace is convex, but much less so than in C. M ( Andrei, and 
is of a much more oval shape. 
Hab. Near the Isle of Skye; collected by B. M "Andrew, Esq., 
August 1850. 
3. Cypridina Mari.®, Baird. (PI. XVII. f. 5-7.) 
Carapace valves elongate oval, of exactly the same size at each ex¬ 
tremity ; extremities rounded. Dorsal and ventral margins nearly 
plane, or very slightly arched. Surface of valves of a white shining 
colour, mottled with a few spots of a dull white, and covered with 
minute superficial punctations. Notch or ventral margin of anterior 
extremity blunt, leaving the upper and lower margins of the notch 
very obtuse. 
Approaches Asterope elliptica of Philippi somewhat in figure of 
carapace, but is much more elongate, and is one-third larger. 
Hab. Off the Isle of Skye ; collected by B. M"Andrew, Esq., Au¬ 
gust 1850. 
PI. XVII. f. 2-4. Estheria Dahalacensis. Vide Proc. Zool. Soc. 
1849, p. 89. No. 5. 
No. CCXVII. —Proceedings of the Zoological Society. 
