416 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



lip with outer lobes slightly cui"ved, converging distally; no inner 

 lobes; lateral processes long, narrow. 



Gnathopods 1 and 2 simple, much alike; 1 shorter. Gnathopod 1, 

 second joint about as long as fourth to sixth combined; fifth joint 

 slightly longer than wide, nearly twice as long as narrower sixth joint; 

 sixth joint slightly longer than wide, without palm; seventh joint 

 short, weak; second to sixth joints bearing many long slender spines. 

 Gnathopod 2 like 1 except joints are all proportionately longer. 



Pereopods 1 and 2 alike, shorter than pereopod 3; fourth joint very 

 sUghtly expanded; seventh joint small, nearly straight. Pereopods 

 3-5 increasing consecutively in length; 3 and 4 much alike, second 

 joint not much expanded, twice as long as wide, with lower hind 

 margin slightly lobed; fourth joint slightly expanded ; sixth joint nearly 

 twice as long as fifth; seventh joint rather short, nearly straight. 

 Pereopod 5 stouter, longer than 4; second joint nearly twice as long as 

 wide, with rather deep lower hind lobe; fourth joint slightly expanded, 

 scarcely produced behind; fifth joint slightly shorter than fourth; 

 sixth joint slightly longer than fourth; seventh joint greatly developed, 

 as long and wide as sixth and entirely different from that of any other 

 pereopods, being paddle-like, very thin, converging to very sharp 

 apex, and bearing row of short spinules on front margin (fig. Ilk). 



Coxal plates 1-4 deeper than their body segments and decreasing 

 consecutively in depth. Coxal plate 1 greatly expanded distally with 

 front margin reaching front margin of head. Coxal plates 2 and 3 

 about as wide as their body segments and with sides parallel. Coxal 

 plate 4 nearly as wide as second and third combined, with lower margin 

 curving obliquely upward and upper hind margin excavated to fit 

 front margin of coxal plate 5. Coxal plates 5-7 not quite as deep as 

 their body segments (fig. 11a). 



Branchiae present on gnathopod 2 and pereopods 1-5, all more or 

 less irregularly folded, crumpled, or lobed. 



Pleon segment 1, lower hind corner not produced. Pleon segment 

 2 sharply produced; segment 3 more sharply produced than 2. Uro- 

 some segment 1 with dorsal hump and slight lateral ridges. 



All uropods reaching back about same distance. Uropod 1, 

 peduncle slightly longer than inner ramus, which is slightly longer 

 than outer ramus. Uropod 2, peduncle slightly shorter than outer 

 ramus, which is shorter than inner ramus. Peduncle and rami of 

 uropods 1 and 2 edged with many short spines. Uropod 3, peduncle 

 about Yi as long as subequal rami, which are lanceolate, thin, flat, 

 edged with short spines (figs. llZ,w). Telson reaching slightly 

 beyond peduncle of uropod 3, slightly longer than wide, with sides 

 converging to slightly excavated end (fig. lln). Length of male 

 from front of head to end of uropods about 15 mm. 



