324 DISCOVERY REPORTS 



Telson three times as long as wide, with four widely-spaced lateral spines; distal 

 margin not produced, with seven spines on either side of median spine ; spine formula 

 II, I, II. 



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

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

 segment i. 



Chelae not fully developed. Leg 5 with small exopod. Epipods absent. Three pairs 

 of pleopods. 



As the three specimens are all young it is possible that the pleopod on somite 2 

 may appear late. If this is so they may be referable to species D. X. 



Thalassinid B.R. VI (Fig. 24) 



Barrier Reef St. 44. 



Rostrum i-o mm.; body 37 mm. 



Rostrum broad, scarcely longer than antennule. Carapace with small, close-set 

 teeth. Abdomen: somite 2 with large hollowed spine; somites 3-5 with low smooth 

 ridge and small posterior point. Pleura all rounded. 



Fig. 24. Thalassinid B.R. VI. 

 a. Side view. b. Telson. 



Telson three times as long as wide; lateral spines widely spaced; posterior margin 

 convex, with four spines on either side of the median spine; spine formula 8, 1,8. 



Eye pale, slightly pointed. Antenna: basis with small inner spine; scale without 

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

 with outer seta on segment i. 



Legs I and 2 with large chelae. Leg 5 without exopod. Epipods absent. Three pairs 

 of pleopods. 



Stage L Total length 2-35 mm. 



Rostrum cylindrical with terminal spicules. Telson as in Callianassa, triangular, 

 with median spine shorter than spine 7. 



