2 g 2 NATURAL HISTORY BULLETIN. 



on the branchial, hepatic and intestinal regions; regions well 

 marked. Front deflexed, about two-fifths the width of the cara- 

 pace; margin thin, divided into two very slightly convex, entire 

 lobes. Orbit nearly as wide as half the front, with two short, 

 closed fissures above and a large outer notch; edge granulate; 

 outer angle obtuse, not prominent; upper margin nearly 

 transverse. Antero-lateral margin shorter than the postero- 

 lateral. Lateral teeth four besides the orbital; the first small, 

 triangular; the second, the broadest; the third the longest 

 and most prominent, acuminate; the fourth postero-lateral, 

 minute. Second segment of abdomen much narrower than 

 the first and third, exposing the sternum; third segment with 

 angular margins; third, fourth and fifth segments coalesced; 

 terminal segment with extremity rounded; proximal margin 

 concave. Surface of abdomen smooth, of sternum granulate. 



Chelipeds unequal; granulate; merus trigonal, thick, upper 

 margin with a spine one-third the distance from the proximal 

 end. Carpus with an anterior groove, and sharp inner spine. 

 Granulation of the smaller propodus coarser than that of the 

 larger; in both there is a tendency to form longitudinal ridges. 

 There is a broad truncate tooth on the propodus at the base 

 of the dactylus in both chelae; in the larger, the dactylus has 

 a large basal tooth; both fingers deeply grooved; pollex with 

 a granulate ridge above the lower margin; dactylus with 

 proximal portion of upper surface granulate. The brown 

 color of the dactylus does not extend quite to the manus; the 

 color of the pollex is even less extensive. Fingers not gaping. 

 Ambulatory legs slender; superior margin of meral, carpal 

 and propodal joints minutely spinulous. 



One male was dredged at station 2644, steamer " Alba- 

 tross," off Cape Florida, lat. 25 40' N., long. 8o° W., 193. 

 fathoms (U. S. Nat. Mus. No. 11407)- 



Female. — At stations 2400 and 2401, southwest of Cape San 

 Bias, Florida, 142 and 169 fathoms, were taken one female 

 each, which I refer provisionally to the same species as the 

 above. They differ from the male as follows: The postero- 

 lateral margins are less convergent, and the lateral teeth are 



