CYPRIDJNA. 
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structure from,, the second pair of feet in the Cypris. 
Only one species has been described by M. Edwards, a 
native of the Indian Ocean ; but in the ‘ Ann. and Mag. 
of Nat. Hist.’ for December 1847, I described two addi- 
tional, one of which is a native of the Atlantic Ocean, and 
the other an inhabitant of the Scottish seas. 
Anatomy , 8fc . — The eyes are two in number, situated 
nearly in the middle of the body. They are each placed 
upon a lengthened conical peduncle, are of an ovoid shape, 
and are composed of about twenty crystallines. 
The first pair of antennae (t., XXII, f. e) is large, and 
consists of five articulations, the last of which is short, and 
terminated by several long filaments ; the second pair 
(t. XXIII, f. c) is shorter, and is formed of the same 
number of joints, each furnished with several setae. 
The mandible is a flat plate, armed at. its extremity 
with three or four sharp teeth. The first pair of jaws is 
composed of a large body with three or four appendages, 
like fingers, armed with stout cilia, and having attached 
to each a large branchial plate (t. XXIII, f. g) furnished 
with fifty finely plumose setae. The second pair (t. XXIII, 
f. d) consists of an oval plate, divided into three articula- 
tions, and armed with numerous short setae. 
The natatory feet (t. XXII, f. b) are peculiarly-formed 
organs, having as the basilar joint a large fleshy body, 
which gives off from its upper edge a long, slender branch, 
composed of eight articulations, furnished with long plu- 
mose filaments, and a small appendage from its anterior 
margin, formed of two short articulations. The oviferous 
feet (t. XXII, f ./) are long and slender bodies, cylindrical, 
twisted, divided into very numerous short joints, and 
furnished near the upper third of their length with several 
sharp, stout, serrated spines. 
The abdomen (t. XXII, f. y) is terminated by a large 
caudal plate, which is broad, and armed at its extremity 
and inferior edge with several stout serrated hooks or claws. 
Very little is known of the habits and manners of these 
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