814 CRUSTACEA. 



stout at base, the first two joints being about four times as thick as 

 the following joint ; last joint of base slender; flagellum about twelve- 

 jointed, a little shorter than base, joints slightly oblong, narrow at 

 base ; inferior antenna slender, ciliate below, sparingly longer than 

 base of superior pair. Hand of first pair of legs with a small acute 

 prominence on the palm near the base of the joint, and the palm is 

 hairy ; length of the hand half that of the second pair. Hand of the 

 second pair broad and oblong, narrowing from middle towards apex, 

 with the lower posterior angle rounded; palm nearly straight and 

 densely hirsute, without a tooth or spine where the closed finder 

 reaches ; it has a slender acute tooth near middle, and an oblique, 

 truncate, subquadrate one, just anterior. Flagellum of the superior 

 antennae about twelve-jointed. Branchial appendages nearly round. 

 First joint of last six legs with the upper apex prolonged and acute ; 

 second joint very small ; tarsus stout, and having a prominence with 

 two short spines, below near base. Length, one half to two-thirds of 

 an inch. Colour of specimens found on sea-weed, nearly brick-red. 



Caprella dilatata, Kroyer, Tidssk., iv. 1843, 585, pi. 8, figs. 1-9. Kroyer's speci- 

 mens were also obtained from the anchor. Kroyer makes both teeth of the palm of 

 the hand of second pair of legs acute ; but our specimens have the anterior one truncate, 

 giving it an oblique, subquadrate form. 



Caprella eobusta. 



C. dilatatae rostro horizontal^ capite brevi, branchiis, aliisque affirm, sed 

 paulo angustior, segmentis paido oblongis, Stio thoracis mx latiore 

 qvam 2dum. Antennas lmce bad graciliores, articulis flagelli ac in 

 dilatata, swpe paucioribus, 2dce basi lmarum longiores, infra ciliatce. 

 Branchim rotundato-ellipticos. Nanus 2da lata, palrnd sparsim hir- 

 sutd, versus basin acuth dentigerd, et ante medium dente acuto scepe 

 armatd. 



Near the C. dilatata in the horizontal beak, short head, the bran- 

 chiae, and other characters, but somewhat narrower. Superior 

 antennae more slender at base, a little longer than half the body ; 

 flagellum a little shorter than the base ; inferior pair longer than 

 base of superior, ciliate below. Branchise round-elliptic. Hand of 

 second pair broad, palm sparsely hirsute, near base bearing an 



