

Right Chela. 





Left Chela. 





Length. Height. Length of Dactylus. 



Length. 



Height. Length of Dactylus. 



6 



114 mm. 42 62 



112 



38 62 







6S 25 39 



68 



23 38 



MUSEUM OF COMPARATIVE ZOOLOGY. 7 



In four of the above specimens the greatest expanse of the ambulatory legs, 

 which is at next to the last pair, is as follows. No. 5, 540 mm. ; No. 6, 625 mm. 

 (24.6 inches) ; No. 8, 380 mm. ; No. 10, 417 mm. The chelae are almost ex- 

 actly alike on the two sides, and in the largest male and largest female give the 

 following measurements : — 



No. 



OXYSTOMATA. 



CALAPPID^E. 



Acanthocarpus Alexandri Stimpson. 



Stimpson, Bull. Mus. Comp. Zoo!., II. p. 153, 1870. 

 A. M. -Edwards, Ibid., VIII. p. 19, PI. I. fig. 2, 1880. 

 Smith, Proc. National. Mus., Washington, III. p. 418, 1881. 



Station 345, N.Lat. 40° 10' 15", W. Long. 71° 4' 30", 71 fathoms. A single 

 male recently moulted and very soft, the carapax about 36.0 mm. long and 

 36.1 broad. It has also been taken at several stations off Martha's Vineyard 

 by the U. S. Fish Commission in 1880 and 1881, and in living specimens from 

 these stations the dorsal surface of the carapax and chelipeds was pale reddish 

 orange, deepest in color upon the elevations of the carapax and upon the bases 

 of the carpal spines of the chelipeds ; while the carapax beneath, the sternum, 

 abdomen, and the under surfaces of the chelipeds and ambulatory legs are 

 white, very slightly tinged with reddish. 



DOPIPPID^. 



Cyclodorippe nitida A. M.-Edwards. 



Bull. Mus. Comp. Zoo!., VIII. p. 24, 1880. 

 Plate II. Figs. 1 - l h . 



Station 319, N. Lat. 32° 25', W. Long. 77° 42' 30", 262 fath. One speci- 

 men, which gives the following measurements : — 



Station 319 



Sex . 9 



Length of carapax to middle of front 6.1mm. 



" " including frontal teeth 6.4 



Breadth between tips of lateral teeth 6.9 



Greatest breadth back of lateral teeth 6.9 



Length of cheliped 10.0 



