I9I7-] S. Kemp •. Notes on Crustacea Decapoda. 229 



extends nearly to the end of the antepenultimate segment, which 

 is conspicuously flattened and dilated distally; the terminal seg- 

 ment is about three quarters the length of the penultimate. 



The first peraeopods reach the tip of the antennal scale. The 

 carpus is rather less than twice the length of the chela ; the fin- 

 gers bear tufts of setae and are a little longer than the palm. 



The second peraeopods reach beyond the end of the scale by 

 the length of the chela and are equal and equally long in both 

 sexes. The merus is a shade longer than the ischium and is about 

 one and a quarter times the length of the carpus. The chela is 

 rather more than one and a half times the length of the carpus and 

 the palm is about two thirds the length of the fingers. The whole 

 limb bears a singularly close resemblance to that of Leander styli- 

 ferus and differs widely in form from that of typical Palaemon. 

 The basal segments are all slender : the carpus is broadened dis- 

 tally where it is fully one and a half times as thick as at its proxi- 

 mal end; the palm is strongly inflated and much broader than 

 the carpus, while each of the fingers is very slender, slightly curved 

 and with an inturned claw at the apex (pi. x, fig c). The fingers 

 meet throughout their length when the chela is closed and are with- 

 out teeth on their inner margins. The entire limb is glabrous 

 except for a few fine and sparsely distributed hairs on the fingers. 



The last three pairs of peraeopods are very slender and in- 

 crease successively in length to a notable extent. The third pair 

 reaches beyond the tip of the antennal scale b}'' the length of the 

 dactylus, the fourth by the dactylus and the greater part of the 

 propodus, the fifth by the dactylus, propodus and a small portion 

 of the carpus. The fifth leg is more than twice the length of the 

 carapace and rostrum combined. In the third pair the carpus 

 and dactylus are about equal in length ; the propodus is nearly 

 two and a half times as long and is a little shorter than the merus. 

 In the fifth pair, which is excessively slender, the carpus is a good 

 deal more than twice the length of the dactylus. The propodus 

 is twice the length of the carpus and is one and a fifth times as 

 long as the merus. Two or three pairs of microscopic spinules may 

 usually be found on the propodi of the third and fourth pairs 

 and a series of similar but more closely-set spinules at the distal 

 end of the same segment in the fifth pair. In all three the upper 

 surface of the dactylus is setose (pi. x, fig. d). 



The abdomen is smooth. In adults the sixth somite, measured 

 dorsally, is about one and a half times the length of the fifth; in 

 young examples it is rather longer. The telson is much shorter 

 than the inner uropod ; it is smoothly rounded above and gene- 

 rally bears two pairs of minute dorsal spinules. The apex is very 

 narrow and consists of a small median point flanked by a pair of 

 spinules. Those of the inner pair are long and between them there 

 are two plumose setae; those of the outer pair are quite short (pi. 

 x,fig. e). 



Large specimens reach a length of about 55 mm. from the 

 tip of the rostrum to the apex of the telson. The eggs borne by 



