GAMMARIDEA. 



839 



outer pair a little longer than half the body, flagellum three-jointed. 

 Feet of first pair furnished with a small hand; hand of second pair 

 short, oblong, nearly straight below, and furnished very thickly 

 with very fine, long, plumose hairs, longer than the breadth of the 

 joint; carpus slightly oblong, not produced below ; third joint much 

 produced below anteriorly ; ten posterior feet subequal, setae short, 

 rather few, not longer than diameter of fifth joint. 

 Female .—Body more broadly elliptical than in male. Antennae 

 a little shorter, the inner pair a little longer than base of outer. 

 Hand of second pair of legs of moderate size, broad and but little 

 oblong, arcuate below and hirsute, but not furnished with long 

 hairs like the male ; carpus not oblong. 



Plate 55, fig. 9 a, male, in dorsal view, much enlarged ; b, same, 

 lateral view ; c, flagellum of superior antennae ; d, tarsus of one of the 

 six posterior legs ; e, extremity of abdomen, upper view ; /, same, side 

 view.— g, female, upper view ; h, leg of first pair ; i, part of leg of 

 second pair; h, hand of same, seen somewhat obliquely, as in its 

 natural position in aside view of the animal; I, extremity of one of 

 the other legs. 



Dredged in the harbour of Rio Janeiro. 



Length, the abdomen inflexed, about two lines ; with the extended 

 abdomen, three lines. The epimerals are very small, but distinct. 

 The hairs on the under side of the hand of the second pair of legs in the 

 male are longer than the width of the hand, and much less than half 

 the same width in the female. The hairs on the under surface of the 

 third joint of the same legs are in a few transverse series. The tarsus 

 has an angle below near base, and no setse towards apex. The males 

 and females differ very considerably; yet we think there is little 

 doubt of their being the same species. Numerous specimens of both 

 sexes were obtained together. 



Genus CYETOPHIU3I, Dana. 

 Platophio ferme affinis. Antennce superiores non appendiculatce. 

 Very near Platophium. Superior antennae not appendiculate. 



The single species of this genus obtained (at Singapore), has the 



