THE GEAPSOH) CBABS OP AMEBICA. 23 



1893; station 51; 1 male (Mus. S. U. I.). American Shoal Light 

 bearing N. by TV. TV. about 10 miles; 105-110 fathoms; June 27, 

 1893; station 52; 1 male (20027) ; 2 males (Mus. S. U. I.). American 

 Shoal Light bearing NE. by N., 8 miles; 70-80 fathoms; June 29, 

 1893; station 62; 1 male (Mus. S. U. I.). 



Pourtales Plateau; lat. 24 16' 00" N.; long. 81 22' 00" TV.; 

 about 200 fathoms; June 27, 1893; station 56, State Univ. Iowa 

 Exped.; 1 male (Mus. S. U. I.). 



Gulf Stream, off Key TVest, Florida; lat. 24 18' 37" N.; long. 81 

 36' 50" TV.; 127 fathoms; rky.; temp. 58 F.; Mar. 4, 1902; station 

 7301, Fish Hawk; 2 males (46184). 



PILUMNOPLAX EL AT A (A. Milne Edward*). 

 Plate 3. 



Eucratoplax data A. MILNE EDWABDS, Bull. Mus. Comp. Zool., vol. 8, 1SSO, 

 p. 18 (type-locality, West Florida, 13 fathoms; holotype female in 

 Paris Mus.). 



Eucratoplax data ? RATHBUN, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 

 1898, p. 281. 



Diagnosis. Carapace convex, regions defined; edge of front thin. 

 Wrist armed with one spine or tooth. Third, fourth, and fifth seg- 

 ments of male abdomen fused. 



Description of male. Carapace subquadrate, convex, punctate, 

 granulate 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 

 and minute. 



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; immovable finger with a granulate ridge above the lower 

 margin: dactylus with proximal. portion of upper surface granu- 

 late. 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. 



