LARVAE OF SERGESTES 



41 



Abdomen with long slender dorsal spines on all somites. Lateral spines long and 

 stout, of about equal length. Each is armed with long spinules, the first on both sides 

 and the others behind only ; spine 5 has three of these long spinules. Telson deeply 

 forked, with a pair of lateral spines, and two outer and two inner spines on each arm 

 of the fork. 



Fig. 32. S. coniiculiim A. a, Acanthosoma i ; b, Acanthosoma 2. 



Eyes large, swollen behind, total length about one-fifth length of body. Width of 

 eyeball half length of eye. Antennal scale with one outer seta, four stout terminal and 

 seven inner marginal setae ; flagellum much longer than scale. Pleopods small. Exopod 

 of uropod with nine outer setae, this setose part twice as long as bare basal part. 



Acanthosoma 2 (Figs. 32 b, 33 b). Length 3-6 mm. Rostrum i-i2 mm. 



Rostrum shorter than antennule. Hepatic spine with nine long spinules at base. Lateral 

 spines of abdomen longer, the last with four long posterior spinules. Antennal scale about 

 14 times as long as wide with long subapical spine. Pleopods long, with small endopods. 

 Uropods about 13 times as long as wide: setose part 2-3 times as long as bare part. In 

 both stages the setae are conspicuously feathered. Somite 6 with long setae on dorsal side. 



Colour as in Elaphocaris. 



