LARVAE OF DECAPOD CRUSTACEA 3gi 



Stenopid VI (Fig. ii) 

 St. 711 

 Stage Y}. Length 13-35 "^n^- (rostrum 4-7 mm.). 



Rostrum much longer than antennule, smooth. Supra-orbital spines large; carapace 

 rounded behind. Abdominal somites 1-3 with large forwardly directed pleural spines, 

 that of somite i peculiarly large ; somites 4 and 5 without pleural spines. Somite 3 

 produced into an enormous dorsal spine. Somites 5 and 6 with dorsal spines, the latter 

 without lateral or anal spines. 



KEY TO THE FORMS OF STENOPID LARVAE HERE DESCRIBED 



a. Median ventral hook on abdominal somite 5. 

 b. Abdominal somite 3 without dorsal spine 

 bb. Abdominal somite 3 with dorsal spine. 



c. Rostrum smooth, or with minute spinules ... 



cc. Rostrum with small teeth near end 



aa. No median ventral hook on abdominal somite 5. 

 b. Abdominal somite 3 without dorsal spine. 



c. Rostrum very short; abdominal somites i, 4, 5 without pleural spines 

 cc. Rostrum long; pleural spines on all somites 



Stenopus sp. II. 



Stenopus hispidits. 

 Stenopus sp. III. 



Stenopid I. 

 Stenopid II. 



