196 Bulletiyi Vanderbilt Marine Museum, Vol. VI 



Technical description: Mr. Kemp's excellent description 

 of this species is an invaluable reference for other students. The 

 "Alva" specimens, both of which are males, apparently are the 

 first record of this interesting little shrimp from Muntok, the 

 nearest previous record being Java, reported by Dr. Nobili. The 

 specimen from Muntok has the rostrum little more than twice as 

 long as the median width ; excavate ventrally above the eye ; the 

 rostral formula being ^-~', the teeth being on the distal half. 

 The carapace is compact, dorsally arched, with one tooth at the 

 base of the rostrum. The antennal tooth is acute and there is 

 a series of denticles, ten to twelve, on the anterolateral mar- 

 gin. The abdomen is compact in the female, more slender in the 

 male. The sixth abdominal segment is twice as long as the fifth 

 and the telson is tapered, terminating in a triangulate apex, armed 

 by an inner pair of long spinules that exceed the length of the 

 apex, and outside of these a pair of shorter spinules. The uropoda 

 have the outer blade shorter and wider than the inner blade ; the 

 outer blade is about three and a half times as long as its maximum 

 width. 



The eyestalk is thicker than the cornea and is produced into 

 a pointed process at the inner distal angle. 



The antennular peduncle has the distal margin extending 

 slightly beyond midway the scaphocerite. 



The antennae support a well-developed scaphocerite, about 

 three times as long as wide, with the outer lateral margin nearly- 

 straight, or slightly concave, terminating in an acute tooth dis- 

 tally, with the inner lateral margin crenulate, the blade being 

 very narrowed distally, widest about one-third of the length from 

 base, thence tapered in both directions, but more so distally. The 

 male scaphocerite is usually slenderer than that of the female. 



The second pair of legs, when extended, reach about as far as 

 does the rostrum. The carpus is three-jointed, the second joint 

 being about twice as long as the first, which is subequal to the third 

 joint ; the palm is somewhat longer than the distal carpal joint and 

 is also longer than the related fingers. 



The third, fourth and fifth pairs of legs are similar, each hav- 

 ing the dactyl over one-third as long as the related propodus, 

 armed with a series of three or four spines on the inferior margin 

 and with a two-spined tip. 



