1. '08. 76 



forwardly directed spines, most of which are articulated; the 

 2X)sterior eight or ten of these He behind the orbit and are 

 rather more closely set than the others. Ventrally the ros- 

 trum is unarmed but carries a series of plinnose setae. 



The carapace is less than half the length of the abdomen ; 

 it is furnished anteriorly with a dorsal carina which becomes 

 obsolete shortly before reaching the well marked cervical 

 groove. This groove is continued downwards and forwards on 

 either side and terminates in a small but distinct depression 

 in the hepatic region. The branchial regions are defined 

 superiorly by a groove and another groove also runs back from 

 the posterior edge of the orbit. Anteriorly the supra-antennal 

 and antero-lateral angles are defined by spines. 



The ahdommal somites are rather laterally compressed, but 

 are all dorsally rounded. The third is somewhat produced pos- 

 teriorly and forms an obtuse hood over the succeeding somite ; 

 it does not take the form of a spine in any of the specimens 

 examined. The sixth somite is rather more strongly com- 

 pressed than the others and is more than twice the length of 

 the fifth. The telson (fig. 7), which is sulcate above, is about 

 as long as the outer uropod ; dorso-laterally it is furnished with 

 six or seven pairs of short spines. It is evenly narrowed to 

 an apex (fig. 8) armed with three spines ; at the outer angles 

 are two of considerable length, over the bases of w^hich two 

 shorter spines are situated, which perhaps represent the distal 

 pair of the dorso-lateral series, while between the two large 

 spines two, much shorter, are found, which are borne on a 

 rounded lobe or projection. 



The eyes are pyriform, wdth the black cornea much wider 

 than the stalk and about three-quarters the width of the an- 

 tennal scale. The antennular peduncle reaches to slightly 

 more than half the length of the antennal scale. The lateral 

 process is acutely pointed distally and does not reach the an- 

 terior margin of the basal segment ; the terminal joint is very 

 slightly longer than the second. The flagella are of great 

 length ; in the male the outer pair are much stouter at the 

 base than the inner and strongly setose ventrally for a distance 

 about equal to the length of the carapace. The antennal scale 

 is about two-thirds the length of the carapace and is only very 

 slightly narrowed apically ; it terminates distally in a small 

 spine which does not surpass the lamellar portion. In older 

 specimens (fig. 2) the outer margin is slightly convex, the 

 scale being little more than four times as long as wide ; in a 

 specimen 36 mm. in length (fig. 3) it is about five times as 

 long as wide and the outer margin is practically straight. The 

 flagellum is very long, sometimes quite three times the entire 

 length from the rostrum to the telson. 



The oral appendages have been adequately described and 

 figured by Smith (1882). The third maxillipedes reach to 

 about three-quarters the length of the antennal scale ; the 

 terminal segment is about two-thirds the length of the pen- 

 ultimate and the slender exopod reaches to about three-quar- 

 ters the length of the proximal joint. 



