256 Transactions.—Z oology. 
large, sub-pediform, geniculate, not branchial. Post-abdomen with two 
broad plates, clawed. 
Fam. I. Cypridinide. 
Superior antenne large, many-jointed, setiferous at the extremity. 
Inferior antenne with the natatory branch nine-jointed, and furnished with 
ciliated setze.  Mandibles rudimentary; palp large, pediform, four-jointed. 
Second pair of jaws with a large branchial plate. One pair of feet, vermi- 
form, annulated and armed with prickly spines at the apex, oviferous. Two 
compound eyes, and one large simple eye. 
Nore.—In the Zoological Society Proc. for 1850, at p. 255, Mr. Baird 
has described, from the dried and bleached valves, a species of Cypridina (?) 
Not having seen his drawings, I am unable to say whether it is the same as 
the species described by me, as Philomedes agilis. The following is Baird’s 
description :— 
** Cypridina zealanica, Baird. 
Carapace valves of an oval form, somewhat flattened, but convex in the 
centre and striated; the strie are numerous, close-set, and of a waved 
appearance. Surface of valves covered with minute punctations, which 
probably give origin in the fresh state to short hairs, though they are not 
visible in the dried specimens. The anterior extremity is slightly narrower 
than the 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 Museum 
by the Rey. R. Taylor of Waimate in New Zealand, along with a collection 
of marine and freshwater shells, but without any history attached to them.” 
At p. 102 of the same volume this species is described as C. zealandica. 
Genus I. Philomedes, Lilljeborg. 
Cypridina, Baird. Brit. Entom., p. 176. 
Philomedes, Lilljeborg; G. O. Sars; Norman; Brady, Zool. Soc., Proc. 1871, p. 291. 
Shell of moderate strength and density. Superior antenne six-jointed ; 
in the female short and thick, and bearing several subequal terminal setze 
of moderate length ; in the male more elongated, two of the terminal sete 
of excessive length, the antepenultimate joint bearing a stout and densely 
setose auditory filament. Natatory branch of lower antenne nine-jointed ; 
in the female having the first joint very long, the rest short and subequal ; 
in the male the first and third joints long, the second much shorter, the rest 
> short and subequal; secondary branch in female indistinctly jointed, setose ; 
in the male long, three-jointed, cheliform. Mandibular feet nearly alike in 
both sexes; in the female armed with mandibuliform processes and spines, 
in the male bearing on the basal joint a small tubercle with two short hairs; 
second pair of jaws in the female armed with mandibuliform processes. 
Eyes of the female small and pale-coloured; of the male large, deep-red, 
