THE GRAPSOID CBABS OF AMERICA. 31 



Chelipeds not very unequal, and of moderate length, finely granu- 

 late. Merus with a tooth on upper margin near the middle. Carpus 

 with an inner spine of good size and a small spine at outer angle. 

 Propodus widening distally, upper and lower edges margined, upper 

 one convex, fingers broad, grooved, fitting close together, prehensile 

 teeth thin, broad, irregular, tips crossing, dactylus of larger chela 

 with a strong basal tooth. 



Ambulatory legs long and slender, slightly hairy, merus joints 

 with low spinules above. 



First segment of abdomen of male very wide, covering the sternum ; 

 second segment much shorter ; third not reaching the coxae and com- 

 pletely fused with the fourth and fifth. 



Measurements. Male holotype, length of carapace 6, width of 

 same 9.5, width of front 3.2 mm. Female, Tortugas, length of cara- 

 pace 9, width of same 13.5 mm. 



Range. West and south coasts of Florida; 10 to 23 fathoms. 



Material examined. 



West coast of Florida; lat. 25 23' 00" N.; long. 82 43' 00" W.; 

 23 fathoms; sft. gy. M.; temp. G6 F.; Feb. 26, 1889; station 5069, 

 Grampus; 1 male holotype (15272). 



Dry Tortugas, Florida; dredged; 1 female (Mus. S. U. I.). 



Ship Channel, Key West, Florida; 10 fathoms; 1916; J. B. Hen- 

 derson; 1 female (49649). 



PRIONOPLAX CILIATA Smith. 



Prionoplax spinicarpus STIMPSON, Ann. Lye. Nat. Hist. New York, vol. 7, 



1859, p. 59. Not P. spinicarpus Milne Edwards. 

 Prionoplax ciliatus SMITH, Trans. Connecticut Acad. Arts and Sci., vol. 2, 



1S70, p. 1GO (type-locality, Panama; type in P.M.Y.U.). 1 



Diagnosis. Margin hairy. Four side-teeth. Front, seen in front 

 view, projecting below the lower margin of the orbit. No spine at 

 outer angle of wrist. 



Description. Carapace very convex longitudinally, scarcely at 

 all transversely. Surface thickly beset with small tuberculiform 

 granules, space between the granules smooth and shining. Cervical 

 suture indicated by a very distinct smooth sulcus, which is sharp 

 and deep in the longitudinal portions in the middle of the carapace ; 

 branchial regions only indistinctly separated from the cardiac. 



Front lamellar, very strongly deflexed and its edge divided into 

 two prominent, rounded lobes, which, when seen in a front view, 

 project below the inferior margins of the orbits. 



Antero-lateral margin thin and divided by deep rounded sinuses 

 into four slightly upturned lobes or teeth, of which the anterior, 

 the hepatic, and the epibranchial are broad and truncate and their 



1 Unfortunately It is Impossible to give illustrations of this and several other species, 

 the types of which are said to be in the Peabody Museum, as a diligent search in 1916- 

 1937 failed to locate the specimens. 



