82 



and bears two long spines. The second and third joints are 

 about equal and become thicker distally. The two flagella are 

 both quite short, the internal one consisting of only four joints, 

 and being slender throughout, while the outer is made up of 

 about fifteen joints and is broad at the base but narrows rapidly 

 into a long, thin distal portion. The tip of the last peduncular 

 joint bears a semicircle of long plumose hairs which surround 

 the base of the exterior flagellum, which also has a dense fringe 

 of hairs along its inner margin. 



The antennal peduncle consists of four joints, the basal one 

 of which is embedded in a sinus in the sub-marginal part of 

 the carapace just at the end of the linea anomurica. It gives 

 off an internal and an external spine, of which the former is 

 the larger ; both are thick and blunt. The second joint has a 

 sharp spine at the outer side. The flagellum is very slender 

 and is about one and a-half times as long as the carapace, 

 including the rostrum. 



The ischium of the third maxillipedes is triangular in section. 

 It thickens very considerably towards the distal end, which 

 bears two sharp teeth. The merus has two long spines on the 

 inner side ; the carpus is swollen and rough ; the propodite 

 is club-shaped. 



The chelipeds are as long as, or longer than, the body from 

 rostrum to tip of extended telson. They are well developed in 

 both sexes, but are more massive in the male. They are covered 

 above and below with little elongated tubercles or scales, from 

 which spring groups of setae. The three basal joints are slender 

 compared with the others. On the merus, w^hich is more or 

 less quadrilateral in section, there is a dorsal row of four or 

 five teeth ; on the upper distal part of the internal face a single 

 large spine ; near the proximal end of the lower side and pointing 

 inwards, a row of three large spines ; and at the distal extremity 

 four sharp teeth. The carpus is short and bears several spines, 

 including one large one on the inner face. The propodite is 

 the largest joint of the appendage ; the palm is nearly twice as 

 long as the fingers ; it bears no spines. The fixed finger curves 

 slightly outwards at its base and touches the dactyl at the tip 

 only. The interior edges of the fuigers are minutely serrate. 

 Opposite the hollow of the fixed finger the inner margin of 

 the dactyl curves towards the latter, but not far enough to 

 bring the two into contact. 



It should be noted that the form and dimensions of the 

 chelipeds of this species are extremely variable. Among 237 

 specimens Alcock could not find two in which the arrangement 

 of spines was identical. 



The next three pairs of legs are very similar in appearance. 

 The dorsal side of the merus bears a row of sharp, forward- 

 directed spines, the last of the row projecting distally beyond 

 the joint. There is also a distal spine, at the lower end of the 

 merus. The carpus bears a similar sharp dorsal tooth at the 

 tip, but the row of spines is continued on this joint merely by 



