I. '21. 58 



The eyes are placed close together beneath the rostrum ; 

 they are short, much dilated at the base and slightly so at the 

 distal end. The cornea is deeply pigmented and on its dorsal 

 surface exhibits a deep, rounded emargination. The portion 

 of the stalk, extending into this emargination, bears a small 

 terminal spine. There are also small tubercles on the upper 

 surface of the stalk. 



The antennules are short, inserted below the eyes and 

 slightly external to them. The first joint is thick, the other 

 two cylindrical and slender. The third is longer than the 

 second and slightly shorter than the first. When fully ex- 

 tended the first joint just reaches the end of the cornea. The 

 upper flagellum is very slightly longer than the third joint ; 

 the lower flagellum is unusually long. 



The antennal peduncle is slightly shorter than that of the 

 antennules and is inserted immediately below it. The second 

 joint has a long, massive, sharply-pointed external process 

 which reaches the base of the fifth joint. There is a rudimentary 

 acicle, a small, rounded, movable body. The third, fourth, 

 and fifth joints are of the usual form. The flagellum is about 

 one and a half times the length of the rostrum. 



The chelipeds are more or less equal in length, but that of 

 one side (either right or left) is more massive than the other. 

 In the larger limb the ischium is short, with a few spines be- 

 neath. The merus is long with numerous spines ; those on the 

 lower border are small, while two, placed on the inner side near 

 the distal end, are specially large. The carpus is shorter and 

 thicker than the merus ; it has two very large spines on the 

 inner side and numerous others on the upper surface ; on the 

 the lower surface there is only one spine of any size. The 

 propodite is large and massive, almost or quite as long as 

 the carpus and merus combined. The upper surface is convex, 

 with the palm slightly longer than the fingers. On the middle 

 of the upper surface of the palm there is an irregular double row 

 of rather short broad-based spines and there are similar spines 

 scattered irregularly over the outer surface. The fingers 

 are massive, with spatulate tips. The under surface of each 

 finger is hollowed out, so that the cutting edge, which bears 

 large rounded calcareous teeth, is much narrower than the outer 

 edge. Both fingers bear numerous tufts of dark setae, most 

 numerous near the cutting edge and towards the tip ; there is 

 a spine on the outer edge of the dactyl near the base. 



The smaller cheliped bears a general similarity to the larger, 

 but the joints are more slender, especially the propodite which 

 is also proportionately shorter. The irregular double row of 

 spines on the upper surface of the palm is rather indistinct 

 and the fingers are slightly longer than the palm. 



The first three pairs of walking legs are similar ; all are longer 

 than the chelipeds. The ischium is very short, with one or two 

 spines on the lower surface. The merus is long, compressed 

 above and triangular in transverse section. There are rows 



