COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 135 



17b. Carpus with a broad lobe notched to form 2 shallow teeth; 

 walking legs with long plumose hairs ; telson 7-plated in males, 

 incompletely so in females ; no male pleopods. . calculosus 



Pachycheles chacei Haig 



Plate 31, fig. 3 

 Restricted synonymy: 



Pachycheles rudis, Nobili, 1901b, p. 18 (part). Not P. rudis Stimpson. 

 Pachycheles chacei Haig, 1956a, p. 9, pi. 1 (type locality, Bahia Cale- 

 donia, Atlantic Panama) ; 1957b, p. 6. 



Previous Pacific records: 

 Colombia. Bahia Humboldt: Askoy (Haig 1957b). 

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



Diagnosis: Carapace practically devoid of hairs; carpus covered 

 with small granules tending to form longitudinal rows on outer half, 

 anterior margin with a broad lamellar lobe with a row of about eight 

 strongly projecting granules or small teeth along its edge; manus and 

 fingers with granules similar to those of carpus; walking legs almost 

 devoid of hairs ; telson five-plated ; a pair of pleopods in male. 



Description: Carapace about as broad as long in males, usually 

 slightly broader (1.1 times) in females; plicate on posterolateral and 

 frontal regions, otherwise smooth or punctate ; devoid of hairs except 

 for occasional traces on frontal region, visible only under high magni- 

 fication. Front rounded in dorsal view, sinuously triangular or faintly 

 trilobate in frontal view. Outer orbital angle produced into a small tooth. 

 Separated portion of side wall consisting of one large piece and usually 

 two smaller ones. 



First movable segment of antenna smooth, with a distinct conical 

 tubercle on anterior margin ; second and third smooth ; flagellum naked. 



Merus of chelipeds lightly rugose, with a small granular lobe on 

 anterior margin. Carpus armed on anterior margin with a broad lamel- 

 lar lobe, occupying nearly entire margin and with a row of about eight 

 strongly projecting granules or small teeth along its edge, the distal 

 ones a little larger; surface of carpus and lobe covered with small gran- 

 ules, larger and sometimes a little elongate on outer half, there tending 

 to form more or less even longitudinal rows. Manus and fingers with 

 rough granules, similar to those of carpus, more projecting toward 

 outer margin. Dactylus of major cheliped strongly curved ; fingers gap- 

 ing in major cheliped, meeting entire length in minor cheliped ; gape 



