3i6 DISCOVERY REPORTS 



Telson nearly four times as long as wide; posterior margin produced, with very long 

 median spine; spine formula 8, i, 8. 



Eye oval. Antenna with very small inner spine on basis ; scale with outer basal seta. 

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



segment i. 



Leg I chela very large. Leg 5 with long exopod. Epipods on legs 1-4. Four pairs 



of pleopods. 



Fig. 16. Thalassinid D. IX. St. 1576. 

 a. Side view. b. Telson. c. Rostrum. 



Thalassinid B.R. Ill (Fig. 17) 



Barrier Reef Sts. 46, 49. 



Rostrum 2-0 mm. ; body 5-35 mm. 



Rostrum broad at base, tapering, not greatly longer than antennule. Carapace with 

 close-set marginal spines in front. Abdomen : somite 2 without spines ; somites 4 and 5 

 with dorsal pair. 



Telson parallel-sided, three times as long as wide; spines 1-4 widely separated; 

 posterior margin convex with long median spine and four spines either side; spine 

 formula 8, i, 8. 



Eye nearly round, black. Antenna : basis with very long outer and very small inner 

 spine ; scale without outer basal seta. Palp of maxillule and maxilla of three segments. 

 Maxillipede i with outer seta on segment i. 



Chelae of legs i and 2 of fair size. Leg 5 with exopod as long as ischium, with five 

 setae. Epipods on legs 1-4. Four pairs of pleopods. 



