LARVAE OF DECAPOD CRUSTACEA 321 



Telson nearly four times as long as wide ; lateral spines widely spaced ; distal margin 

 produced, with four spines on either side of the very long median spine ; spine formula 

 8, I, 8. 



Eye oval. Antenna without inner spine on basis; with outer basal seta on scale. 

 Maxillule and maxilla with palp of three segments. Maxillipede i with outer seta on 

 segment i. 



Leg I chela large. Leg 5 with small exopod. Epipods absent. Four pairs of pleo- 

 pods. 



Thalassinid D. XII (Figs. 21, 22) 



Discovery Sts. 1574, 1576. 



Rostrum 2*4 mm. ; body 7-79 mm. 



Rostrum broad, not much longer than antennule, constricted at end into a short 

 smooth point. Carapace with about nine marginal spines. Abdomen: somite 2 with 

 large, deeply hollowed, dorsal spine; somites 3-5 with small hollowed spines. Pleura 

 all rounded. 



Fig. 21. Thalassinid D. XII. St. 1574. 



a. Side view. b. Telson. 



c. Antenna. d. Palp of maxilla. 



