MUSEUM OF COMPARATIVE ZOOLOGY. 



11 



fied and spiny plates, nearl)'^ as in the adult female. The third, fourth, and 

 fifth somites are soft, scarcely at aU calcified, and show no distinct division 

 into somites. The sixth is small and sunken for its whole length in the 

 proximal somites, while the seventh is stUl smaller and rounded at the ex- 

 tremity. 



Four of the five specimens seen give the following measurements : — 



Station 1029 



Sex Young. 



Length of carapax including rostrum and posterior 



spines 



Length of carapax excluding rostrum and posterior 



spines 

 Breadth of carapax between tips of hepatic spines, 



" " " ■ " branchial 



Greatest breadth of carapax excluding spines 

 Length of rostrum 



" spines at base of rostrum 



" anterior gastric spines 



** " cardiac 



" right cheliped 



« " chela 



Breadth of « « • . 

 Length of dactylus of right chela 



" left cheliped 



" " chela 



Breadth of " 



Length of dactylus of left chela 



" first ambulatory leg 



" second " " 



" third " « 



Greatest expanse of ambulatory legs 



305 329 

 Young. 9 



326 



17.5 25+ 115 139 



Statiou. 

 305 

 326 

 329 



N. Lat. 

 41° 33' 15" 

 33° 42' 15" 

 34° 39' 40" 



Also taken by the U. S. Fish Commission, oflF Martha's Vineyard, in 1881, 

 Stations 1028 and 1029, 410 and 458 fathoms ; one young specimen in each 

 case. 



