in front of the cervical groove three long spines along the median line (PI. II, fig. ia) and the 

 first among them situated on the transverse front margin ; the antero-lateral angles produced 

 into extremely long spines, below each of these spines a somewhat shorter spine (PI. I, fig. 5), 

 and somewhat behind the antero-lateral spine a third rather long spine. The spines on that 

 major part of the carapace which is situated behind the cervical groove, may be seen on the 

 two figures already referred to : in the male I counted on this part seventeen pairs of spines 

 and a single unpaired spine, in the female twenty pairs of spines and a single very long and 

 robust, unpaired spine. Each of the two free abdominal segments has three spines, viz. one in 

 the median line and one on each side somewhat above the base of the legs. First abdominal 

 segment has four spines on each side, a single vertical spine below in the median line, and 

 dorsally in the median line near the posterior margin a very long and thick, deeply bifid spine 

 (fig. ia), finally in the male — but not in the female drawn — an unpaired, moderately long 

 spine dorsally near the front margin. Second abdominal segment armed as the first excepting 

 that a front unpaired dorsal spine is wanting in both specimens. Third segment has an unpaired 

 dorsal spine near the posterior margin, a spine below in the median line and three pairs of 

 lateral spines. Fourth segment has no ventral spine but is otherwise armed as the third. Fifth 

 and sixth segments each with a dorsal spine in the median line and two pairs of lateral spines 

 at the hind margin. 



The eye-stalks project from the visible ocular segment (PI. II, fig. ia, os.) as moderately 

 long, quite normal spines without vestige of cornea. In the antennulae the first joint of the 

 peduncle is longer than broad, the two other joints are broader than long and together only a 

 little longer than the first; in the female (PI. I, fig. 5^7) both flagella are slender, many-jointed, 

 moderately long and the inner flagellum somewhat longer than the outer; in the male (PI. II, 

 fig. 1 a) the inner flagellum is shaped as in the female, while the outer is very thickened from 

 the base to near the beginning of the distal fifth, where it tapers somewhat suddenly and the 

 short terminal part is very slender. The antennae have the outer angle of the terminal joint 

 of the peduncle produced in a very long, slender spine (PI. I, fig. 5^); the endopod reaches 

 somewhat beyond the end of the inner antennular flagellum (PI. II, fig. ia); the squama is 

 long, a little less than half as long as the endopod, about 1 1 times as long as broad, a little 

 tapering to the blunt end, with the inner margin a little concave and the outer convex, both 

 margins furnished with long setae excepting on their proximal part, and the outer margin besides 

 with 6 spines in the adult male, 4 — 5 spines in the immature female, spread with somewhat 

 irregular intervals. 



The mandibular palps are long, reaching somewhat beyond the distal end of the anten- 

 nular peduncles (PI. II, fig. 1 a) ; their third joint is flattened, with numerous stiff and long setae 

 along both margins. The maxillipeds (PI. I, fig. 5c) are robust; fourth joint is produced into 

 a very short lobe with a number of short marginal spines; the fifth joint with three long lateral 

 spines, the sixth with four long and strong spines, and the seventh with three (four) similar 

 terminal spines. The gnathopods (PI. II, fig. 1 1>) are nearly twice as long as the maxillipeds, 

 flattened; the three proximal joints have no vestige of lobes; the fourth joint itself is very 

 short at the outer margin, but on the inner side produced into an extremely large lobe 



