CAPRELI.ID.^. 365 



slightly pubescent, somewhat concave, defined by a stout tooth. 

 Perciopoda small, slender. 



Fanalf. — Having the first two segments of the pereion short. Se- 

 cond pair of gnathopoda articulating towards the anterior extre- 

 mity of the second segment of the pereion ; the propodos smaller 

 than in the male ; palm not concave, and defined by a small tooth. 



Length 1 inch. 



Ilab. Not recorded. 



In the collection entrusted to me from the Jardin des Plantes. 



27. Caprella solitaria. 

 Caprella solitaria, Stimpson, Proc. Acad. Nat. Sc. Philad. July 1855. 



" Smooth, slender, bright crimson. Superior antenna; with large 

 peduncles ; inferior ones slender, subpediform. Cephalon with a 

 strong tooth (spine), pointed forwards, between the minute eyes. 

 Gnathopoda large, with two spines within, the largest next the 

 dactylos. Branchial leaflets of the third and fourth segments very 

 small. Pereiopoda with the dactyla curved. 



" Length 0-6 inch ; breadth 0-05 inch. 



" A single specimen (the only Caprella taken at the Cape) oc- 

 curred on a gravelly bottom in Simon's Bay." — Stimpson. 



28. Caprella luctator. 

 CapreUa luctator, Stimpson, Proc. Acad. Nat. Sc. Philad. June 1855. 



" Smooth, rather slender. First joint of the superior antennae 

 thickened, one-third as long as the second, which equals the third ; 

 flagellum 16-articulate. Gnathopoda of the second pair large, tri- 

 dentate below, teeth unequal. Pei-eiopoda robust, "with large uni- 

 dentate propoda. 



" Length 1 inch. 



" Ilab. Janegaisima." — Stimpoun. 



29. Caprella gracilis. 

 Caprella gracilis, Stimpson, P)-oc. Acad. Nat. Sc. Philad. June 1855. 

 " Slender, smooth, with a slender curved rostrum. Second joint of 

 the superior antenna} as long as the first and third together. Pos- 

 terior pereiopoda very slender, the seventh pair twice as long as 

 the fifth. 

 " Length -J inch. 



" Hah. Japan." — Stimpson. 



