COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 235 



margins unarmed ; widest at epibranchial regions. Surface without pub- 

 escence except for tuft on frontal margin. Side walls with distinct, 

 scattered plumose hairs. Front transverse or slightly convex in dorsal 

 view ; transverse in frontal view, with a very slightly projecting median, 

 obtusely triangular point. Orbits very shallow, scarcely showing a con- 

 cavity in dorsal view; outer orbital angle not produced. 



Movable segments of antenna smooth, without anterior projections; 

 flagellum with short hairs. Outer maxillipeds smooth ; surface of ischium 

 with a few scattered hairs. 



Chelipeds markedly unequal in size. Merus lightly rugose, with a 

 broad, rounded, strongly projecting lobe on anterior margin; posterior 

 margin with scattered hairs. Carpus 1.2 to 1.3 times as long as wide; 

 anterior margin with a high, somewhat convex lamellar crest, its proxi- 

 mal end markedly subrectangular ; anterior and posterior margins 

 fringed with fine plumose hairs; posterior margin lightly rugose. Manus 

 slender; surface smooth, inner margin lightly, obliquely rugose, outer 

 margin and pollex with a sharp crest lined with a row of minute rounded 

 granules, these granules becoming stronger and more projecting on pol- 

 lex; outer margin with a fringe of long plumose hairs extending nearly 

 to tip of pollex; pollex and outer half of dorsal surface of manus with 

 shorter scattered hairs. Dactylus roughened by small granules in form 

 of a crest along outer margin; surface with scattered long hairs. Gape 

 with short scattered hairs. Major cheliped: manus somewhat swollen 

 on dorsal surface, with a low longitudinal crest extending from articula- 

 tion with dactyl; length of palm 1.7-1.8 times that of fingers; dactylus 

 somewhat curved outward, crossing over pollex at tip, its cutting edge 

 with a row of large granules and one or two tubercles. Minor cheliped : 

 dorsal surface of manus less swollen than in major cheliped, with a low 

 longitudinal crest; length of palm only slightly greater than that of 

 fingers; dactylus straight, crossing under pollex at tip, its cutting edge 

 with a double row of small granules. 



Walking legs lightly rugose, all segments fringed with fine plumose 

 hairs on anterior and posterior margins. Merus of third walking leg 

 about twice as long as wide, its posterior margin with four or five 

 strong spinules; merus of legs 1 and 2 unarmed. Propodus with a pair 

 of movable spinules at distal end of posterior margin and a single 

 spinule just behind them, that of leg 3 over twice as long as wide. 

 Dactylus with two strong, incurving fixed spines, the distal one com- 

 posed of two spines nearly joined together; proximad to them a minute 

 spinule. 



