LARVAE OF DECAPOD CRUSTACEA 



309 



Thalassinid B.R. I (Fig. 8) 

 Barrier Reef St. 54. 

 Rostrum 3 mm. ; body 6-o mm. 



Rostrum very much longer than antennule, serrated nearly to end. Carapace with a 

 few blunt marginal spines. Abdomen : somite 2 with dorsal spine longer than somite 3 ; 



a. Side view. 



d. Palp of maxilla. 



Fig. 8. Thalassinid B.R. I. 



b. Part of telson. 

 e. IVIaxillipede i. 



c. Palp of maxillule. 



somites 3-5 with small spines. Pleura of somites 3-5 with sharp posterior point and 

 minute marginal teeth. 



Telson about three times as long as wide, slightly wider at end, spines 1-4 closely 

 crowded at posterior angle, spine 2 very small ; posterior margin convex, with enormous 

 median spine and four spines on either side; formula 8, 1,8. 



Antenna with small inner spine on basis ; scale without outer basal seta. Maxillule 

 with palp of two segments. Maxilla with palp of three segments. Maxillipede i with 

 outer seta on segment i of endopod. 



3-2 



