228 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



Previous records: 



Gulf of California. Punta Peiiasco, Sonora; San Felipe: S. A. Glas- 

 sell (Glassell). Isla Coronado; S end Isla Tiburon: J. Steinbeck 

 and E. F. Ricketts (Steinbeck and Ricketts). La Paz: (Locking- 

 ton). 



Panama. Isla Saboga, Islas de las Perlas: Askoy (Haig). 



Colombia. Bahia Humboldt: Askoy (Haig). 



Ecuador. Bahia de Santa Elena: E. Festa (Nobili). 



Diagnosis: Carapace covered with tubercles; lateral margins den- 

 tate, rounded ; front with three strong teeth separated by deep, rounded 

 notches; carpus less than one and a half times as long as wide, anterior 

 margin with a broad, very strongly projecting, proximal tooth followed 

 by two or three denticles, surface with strongly projecting, scattered 

 tubercles; manus covered with tubercles, outer margin with a fringe 

 of long non-plumose setae; telson with five plates. 



Description: Carapace approximately as broad as long or slightly 

 broader, lateral margins rounded ; surface with large flattened granules 

 and tubercles, most projecting toward lateral margins, the latter bearing 

 a row of about six teeth, these teeth often not very distinct; long 

 plumose hairs along lateral margins, tufts on dorsal surface, longest on 

 protogastric lobes. Front strongly projecting beyond eyes, below level 

 of protogastric regions, flattened, not deflexed except near tip, trans- 

 verse or faintly trilobate in dorsal view; deeply tridentate in frontal 

 view, the lobes narrow, triangular, pointed at tips, separated by deep 

 rounded notches, and about equally projecting. Eyes visible in dorsal 

 view. 



Movable segments of antenna lightly granular, with a few short 

 plumose hairs; flagellum not much longer than carapace, with short 

 hairs. Outer maxillipeds punctate. 



Chelipeds covered with large, strongly projecting, scattered tubercles. 

 Merus with a small lobe on anterior margin ; dorsal surface with plumose 

 hairs. Carpus less than one and a half times as long as wide, anterior 

 margin with a broad, very strongly projecting proximal tooth followed 

 by two or three denticles; surface covered with short plumose hairs. 

 Manus and fingers covered with long plumose and non-plumose hairs, 

 denticulate on margins; outer margin with long non-plumose setae. 

 Gape of fingers with a light pubescence. 



Walking legs covered with low tubercles, thickly covered with long 

 plumose hairs. 



Telson of abdomen with five plates. 



