LARVAE OF DECAPOD CRUSTACEA 



389 



Stenopid III (Fig. 8) 

 St. 1580 



Stage VII }. Length 12 mm. (rostrum 3-4 mm.). 



Rostrum extending beyond antennule, smooth. Carapace without supra-orbital 

 spines, rounded behind. Abdominal somite 3 with large dorsal spine ; somites 1-5 with 

 large pleural spines, that of somite i directed backwards, the others forwards. Somite 6 

 with dorsal, but no lateral or anal spines. 



Fig. 8. Stenopid III. St. 1580. 



Stenopid IV (Fig. 9) 

 'Atlantis' St. 1121 



Stage IX?. Length 11 -6 mm. (rostrum 2 mm.). 



Rostrum extending just beyond peduncle of antennule. Supra-orbital spine minute. 

 Carapace deeply grooved in front and behind, rounded behind. Abdominal somite 3 

 with large dorsal spine. Somites 1-5 with pleural spines, those of somite i very large, 

 and all pointing slightly forwards. Somites 5 and 6 with small dorsal spine, the latter 

 without lateral spine. Legs 1-3 chelate, very large. 



This is no doubt the last larval stage, and contrasts very much in size with the 

 equivalent stage in S. hispidus. 



Stenopid V (Fig. 10) 

 St. 1576 



Stage VI ?. Length 16 mm. (rostrum 5-3 mm.). 



Rostrum longer than antennules, smooth. Supra-orbital spines very small ; carapace 

 with strong spine at posterior angle. Abdominal somites 1-5 with pleural spines, directed 

 backwards on somite i and forwards on the others; somites 3, 5, 6 with dorsal spines, 

 the former large. Somite 6 without pleural or anal spines. 



