COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 151 



Diagnosis: Carapace covered with long, scattered non-plumose setae 

 except on frontal region, the latter practically devoid of hairs; carpus 

 with three strongly projecting teeth on anterior margin, inner half with 

 a series of transverse ridges, outer half with three longitudinal rows 

 of strongly projecting granules, a series of transverse ridges between 

 these rows, surface and teeth with scattered, long, non-plumose setae; 

 manus covered with small projecting granules, proximal half with 

 long, non-plumose setae; walking legs with short plumose hairs and 

 long, non-plumose setae; telson five-plated in females; males unknown. 



Description: Carapace about as broad as long, slightly convex front 

 to back; plicate on posterolateral regions, elsewhere punctate; covered 

 with long, scattered, non-plumose setae, but only a trace of hairs ap- 

 parent on frontal region. Front in dorsal view rather strongly project- 

 ing, shallowly trilobate, the lateral lobes produced beyond eye, nar- 

 row, diverging, median lobe broad, slightly more produced than lateral 

 lobes, with a shallow sulcus; in frontal view strongly trilobate, the 

 lobes about equal in breadth, median one slightly more produced ; 

 faintly granulate on edge, the granules produced to form about six 

 minute spinules at the tip of each lobe. Orbits deep; outer orbital 

 angle produced into a narrow, acute tooth. Separated portion of side 

 wall consisting of one small piece. 



First movable segment of antenna with a high, broad spinule occu- 

 pying most of anterior margin; second with a smaller spinule at distal 

 end of anterior margin; third without anterior projection; flagellum 

 naked. Outer maxillipeds rugose. 



Merus of chelipeds lightly rugose on dorsal surface, with a broad, 

 rugose, strongly projecting subtriangular lobe, a blunt spine at its 

 tip, on anterior margin ; ventral surface smooth. Carpus armed on 

 anterior margin with three teeth (a trace of a fourth present in major 

 cheliped), broad, strongly projecting, slightly curved, proximal one 

 largest, others progressively smaller; surface of teeth covered with 

 small, crowded granules; inner half of carpus with a series of distinct 

 transverse ridges, followed distally by several flattened granules; outer 

 half with three even, longitudinal rows of small granules, latter strongly 

 projecting and tending to be obliquely elongate; between the rows, 

 series of short transverse ridges similar to those on inner half of sur- 

 face; posterior margin obliquely rugose, the rugae forming strong 

 ridges and extending onto outer margin of ventral surface, latter other- 

 wise smooth; dorsal surface of carpus and teeth with a few scattered, 

 long, flexible non-plumose setae. Manus covered with small, strongly 



