31 



The basal joint of the anteunular peduncle has two spines at 

 the outer angle ; the third joint is much shorter than the second. 

 The scale extends beyond the peduncle and tapers to a sharp 

 point ; its inner edge bears two or three small teeth. The outer 

 flacfellum is verv thin and less than half as lono as the stout inner 

 one. 



The antennae are about equal in length to the larger flagella 

 of the antennules. The scale is narrow and oval and fringed 

 with plumose setae ; it reaches just beyond the peduncle. The 

 renal tubercle is about equal in length to the whole peduncle. 



The oral appendages are similar to those of Polycheles. 



The chelipeds are nearly as long as the body without the 

 telson, and are compressed in all their joints. The shape and 

 relative lengths of the different joints are the same as in Poly- 

 cheles. Both margins of the merus are spinulose, but the outer 

 edge has only two or three spinules near the proximal end and a 

 single curved distal spine, the inner having a row of very small 

 spinules. The carpus has the usual upper and lower distal 

 spines, and the propodite has one above the base of the dactyl. 



The second pereiopods are much shorter than the chelipeds, 

 and aie also compressed. The merus is long and stout and thickly 

 covered with setae on both margins. It bears two large distal 

 spines and also two near the middle. The carpus has a long 

 proximal and two distal spines, and setae on the outer margin. 

 The palm of the propodite is very slightly larger than the fingers. 



The third and fourth pereiopods are shorter than the second, 

 and have no spines except a single one at the distal end of the 

 mecus and carpus. 



The fifth are the shortest of all. They have no spines and are 

 imperfectly chelate, the fixed finger of the propodite being re- 

 presented by a very short blunt process. 



The first pleopods are very small and extremely slender 

 two- jointed appendages. 



The succeeding pairs are long and well developed, and are 

 fringed with long pinnate setae. K\x appendix interna is present 

 furnished with a group of booklets at the distal end. 



The uropods are slightly shorter than the telson. Both the 

 exopodite and endopodite have spinules and long setae on their 

 margins. 



Size. — The largest specimen taken by the Helga measures 

 35 mm. Bouvier gives the length of his as 30 mm. 



The chief measurements 

 follows : — 



Length 



Length of carapace 

 Breadth of carapace 

 Length of abdomen 

 Length of antennules 

 Length of chelipeds 



of the 



largest 



specimen are as 





35 mm. 





18 mm. 



. . . . 



16 mm. 



. . 



17 mm. 



. • 



10 mm. 



. . 



26 mm. 



