564 CRUSTACEA. 



much beyond the beak. Outer maxillipeds elongate, extending 

 much beyond apex of base of outer antennae. Anterior feet very 

 short, hand subovate, articulated with the carpus nearly by its side. 

 Second pair of feet shorter than third, carpus eight-jointed. Six 

 following feet nearly naked, tarsi below spinulous, spinules of apex- 

 long, the rest very short. 



Plate 36, fig. 2 a, animal, enlarged six diameters ; b, hand of second 

 pair, enlarged about seventy diameters ; c, extremity of leg of third 

 pair, enlarged ; d, tarsus of same, enlarged seventy diameters. 



Dredged in the harbour of Rio Janeiro. 



Length of body, six to eight lines. The teeth of the beak are ante- 

 rior to the line of the eyes. The straight lower margin of the beak 

 is a peculiar characteristic. The fifth joint of the six posterior legs is 

 a little the widest about one-fourth its length from the apex, and at the 

 point of greatest width on inner margin, there is a spinule longer 

 than others above or below; the tarsus closes against the oblique 

 margin below this spinule. The hairs of the hand of second pair are 

 minutely spinulous. Eyes long, and a spine on the carapax over the 

 eye. 



The closing of the tarsi against the preceding joint is more perfectly 

 accomplished in this species, than in other species of Hippolyte, and 

 it gives the legs an imperfect prehensile character. 



HIPPOLYTE OBLIQUI-MANTJS. 



Rostrum longum, tenuiter laminatum, rectum, versus apicem vertlcaliter 

 latius, infra '2-dentatum non rectum, supra ^-dentatum, apice bifidum. 

 Flar/ellum antennarum internarum minus apicem rostri superans, 

 majus paulo longius. Pedes antici perbreves, manu subovatd, carpo 

 manu multo breviore, vix oblongo. Pedes 2di i>tan bn-r lores, carpo 

 3-articulato. Tarsi pedum 6 sequentium infra spimdosi, spinulix 

 apicis longis, deinde scnsim brevioribus. 



Beak long, thin laminate, straight, towards apex broader, below not 

 straight and two-toothed, above four-toothed, apex bifid. Smaller 



