350 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



[6] 



above, and unarmed ; the chela is nearly as long as the rest of the 

 cheliped, nearly a third as broad as long, the body somewhat swollen, 

 rounded, smooth, and wholly unarmed, and the digits about as long as 

 the body of the chela, nearly alike, compressed, longitudinally grooved, 

 and the prehensile edges sharp and undulate. The first and second am- 

 bulatory penieopods are nearly alike, about twice as long as the chelipeds, 

 slender, smooth, and nearly naked; the propodus is a little shorter than 

 the merus, and slightly compressed, and the dactylus considerably longer 

 than the propodus, very much compressed, regularly curved, of nearly 

 uniform breadth to the short and acute tip, and longitudinally grooved. 

 The third and fourth ambulatory i^erseopods are nearly alike, about 

 three-eighths as long as the second pair, slender, and subcylindrical ; the 

 distal segments, except the tips of the dactyli, are slightly hairy and 

 pubescent, and the dactyli less than half as long as the propodi, not 

 very strongly curved, and armed with a few slender spinules on the 

 incurved side. 



The pleon is widest at tlie third somite which is consolidated with the 

 fourth and fifth, and projects either side in an obtusely rounded tu- 

 bercle ; the sixth somite is about a half broader than long, and the sev- 

 enth a little shorter than the sixth, broader than long, and rounded at 

 the tip. 



In the female, the carapax is broader, thicker, much more convex, 

 both longitudinally and transversely, narrower, and armed with very 

 much smaller teeth. The chelipeds are smaller and the chela3 much 

 more slender, being scarcely more than a third as broad as long. 



Measurements in millimeters. 



station 



Sex 



LenKtli of carapax to middle of front 



Lciiy;tli of cariqiax including frontal teetli 

 Briailth betwin ii lateral spines of front .. 



Greatest breailth at branchial regions 



Length of cheliped 



Length of chela 



Breadth of chela 



Length of dactylus 



Length of second ambulatory periEopod . . 



Length of its propodus 



Length of its dactylus 



Length of fourth ambulatory peraeopod . . . 



Length of its propodus 



Length of its dactylus 



2037 



2037 



2037 



11.3 



11.8 



4.2 



10.5 



19.0 



9.0 



2.7 



4.4 



41.0 



9.0 



12.0 



15.5 



2.6 



LI 



13.4 



14.3 



5.4 



13.5 



24.4 



11.3 



3.9 



CO 



52.0 



12.4 



14.5 



20.0 



3.7 



L4 



14.0 



15.0 



5.1 



13.3 



24.5 



12.0 



3.8 



6.3 



53. 



12.3 



15.0 



20.5 



36 



L7 



14.8 



15.5 



4.2 



14.5 



22.0 



9.0 



2.5 



5.5 



48.0 



10.5 



1.5. 



20.0 



3.3 



l.G 



Specimens examined. 



