COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 201 



Diagnosis: Carapace somewhat convex transversely, thickly covered 

 with long plumose and non-plumose hairs ; median frontal tooth broad, 

 its margins spinulate, produced a little beyond narrow lateral teeth, all 

 three pointed at tips; epibranchial angle rounded, bearing two or three 

 minute spinules ; carpus less than one and a half times as long as wide, 

 proximal third of anterior margin with a broad, strongly projecting lobe 

 tipped with a distally directed spine ; fingers opening horizontally or 

 somewhat obliquely ; telson seven-plated. 



Description: Carapace covered with faint plications and flattened 

 fine granules; somewhat convex transversely; regions not distinct; 

 covered with long, scattered plumose and non-plumose hairs, most 

 thickly on frontal and protogastric regions. Frontal teeth acute, extend- 

 ing beyond eyes, lateral ones narrow, slightly converging; median one 

 broad and slightly more produced, somewhat concave, its margins spinu- 

 late, separated from lateral teeth by a narrow U-shaped notch. Outer 

 orbital angle produced into a broad tooth. Epibranchial angle rounded, 

 distinct, bearing two or three minute spinules. 



Movable segments of antenna more or less smooth, without projec- 

 tions; flagellum naked or with vestigial hairs visible only under mag- 

 nification. Outer maxillipeds lightly rugose. 



Chelipeds covered with small flattened granules. Merus with a 

 broad, rugose, strongly projecting, spine-tipped lobe on anterior mar- 

 gin ; surface with a few long, scattered plumose hairs, especially toward 

 posterior margin. Carpus less than one and a half times as long as wide; 

 a broad, strongly projecting lobe on proximal third of anterior margin, 

 the lobe rounded on its proximal side, angled on its distal side, and 

 tipped with a distally directed spine ; surface covered with tufts of long, 

 non-plumose setae. Palm (as well as fingers) lying in a nearly hori- 

 zontal plane, broad, dorsal surface flat, outer margin strongly curved ; 

 thickly covered with tufts of long, non-plumose setae, becoming inter- 

 mingled with plumose hairs toward outer margin, latter bearing a long, 

 thick fringe of plumose hairs. Dactylus thickly covered with long non- 

 plumose setae, outer margin of pollex with a long fringe of plumose 

 hairs; gape without pubescence. 



Walking legs rather stout, lightly rugose; merus with a fringe of 

 plumose hairs along anterior margin, that of leg 3 inflated ; all seg- 

 ments with tufts of long non-plumose setae. 



Telson of abdomen with seven plates. 



Material examined: See Table 60. 



