AM PHI POD A. 13 



Plead shorter than the first segment ; ocular lobe hroad/i/ triangular, />ro/l need 

 beyond flic end of the //edunc/i- of tin' ii/>ji, r /ntfennse. Ei/e moderately large, oval, dark. 



U]>i>er uttfi'itiite : First joint three times as long as the next two united, naked. 

 Flagellum 13- 14 -join ted, the first joint as long as the next three, sparsely setose on 

 the upper side. Appendage 5 -jointed, the first joint the longest, the third the shortest. 

 Loireraiitennse rather longer than the upper ; peduncle reaching the end of the third joint 

 of the rlagellum of the upper ; first joint the longest, second the shortest. Fir*t 

 gnathopods: Side plates narrowed and rounded below; wrist two-thirds of the length 

 of the hand, which is about twice as long as wide, with parallel margins, setose ; palm 

 rather oblique, convex, crenulate, defined by a spine. Second gnathopods as in Orchomene 

 humilis (Costa) [= 0. l>atei, Sars]. Third perseopods : Side-plates wider than the depth 

 in front, with the usual posterior lobe ; first joint about half as large as the side-plate, 

 deeper than wide ; hind margin convex, serrate, produced down to the middle of the 

 third joint ; this is much produced behind and downwards. The fifth perseo/todx have 

 the first joint i/earh/ tir'w UK <leej> UK tcidc, and IOIII/IT than the re*f of the joints, including 

 tin' dactylus, toiji'ther, otherwise like the third pair ; the dactyli of all the perseopods 

 are very short. 



Thefirxt itropod* are subequal in extent to the second, exceeding the third ; the 

 peduncle is one-fourth longer than the subequal rami, all the parts very spinous on the 

 upper margins. Second pair less spinous. Peduncle in the third pair rather longer 

 than the outer ramus : inner ramus not nearly reaching the end of the first joint of the 

 outer, its inner margin minutely serrate. Telxon entire, deeply concave above, the end 

 truncate unfit two setules : it extends beyond the end of the inner rami of the third 

 uropods. 



The difference between the telson of this species and that of the female 0. luonilix 

 is only one of degree, as the truncate margin is slightly concave. 



ORCHOMENELLA PINGUIDES. 



Orchomeitella piiiijuides, A. 0. Walker. 



"W.Q., March to October,1902 ; ten, 14^ fm. ; length 10 mm. 



0. FRANKLINI. 

 O.franklini, A. 0. Walker. 



AV.Q., 15 June, 1902 ; D net, nine, various sizes, length of largest 6 '5 mm. 



0. CHELIPES. (PI. 4, fig. 7.) 

 0. chelipes, A. 0. Walker, Ann. and Mag. Nat. Hist. XVII. (Him;), p. 4.M;. 



W.Q., 28 Feb., 1902 ; eight,, 10 fin. 



Both/ moderately compressed ; first and second segments subequal to the head and 

 each other, remaining mesosome segments rather longer and subequal. First four side- 



