LARVAE OF DECAPOD CRUSTACEA 



31S 



Thalassinid D. VIII (Fig. 15) 



Discovery St. 708. 



Rostrum i-88 mm.; body 5-28 mm. 



Rostrum not much longer than antennule, rather broad, serrated to end. Carapace 

 with close-set marginal spines in front, smooth behind. Abdomen: somite 2 without 

 spine; somites 3-5 with a pair of small dorsal spines. Pleura rounded. 



Telson less than three times as long as wide; posterior margin slightly convex, 

 median spine rather short; spine formula 8, 1,8. 



Eye nearly round. Antenna with small inner spine on basis; scale without outer 

 basal seta. Palp of maxillule and maxilla of three segments. Maxillipede i with outer 

 seta on segment i. 



Fig. 15. Thalassinid D. VIII. St. 708. 



a. Head and rostrum. h. Telson. c. Palp of maxillule. 



d. Palp of maxilla. e. Endopod of maxillipede i. 



Chelae not fully formed. Leg 5 with exopod. Epipods on legs 1-4. Pleopods not 

 visible. 



The last four species are represented only by specimens not fully developed. 



Thalassinid D. IX (Fig. 16) 



Oodeopus geminidentatus Bate. 



Discovery St. 1576. 



Rostrum 2-6 mm. ; body 675 mm. 



Rostrum much longer than antennule, slender, with smooth end. Carapace with 

 very large spine at anterior angle and close-set marginal spines in front and behind. 

 Abdomen: somites 2-5 with subequal pairs of dorsal spines. Pleura 2-5 with strong 

 ventral blunt process. 



