COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 159 



Pachycheles subsetosus, new species 

 Plate 13; plate 32, fig. 4 

 Types: Holotype, male, Hamburg Museum Cat. No. K27053, from 

 Puntarenas, Costa Rica, 6-8 fathoms; 1894; collected by L. Leibfarth. 

 Paratypes: same data as holotype, one male, two females (one oviger- 

 ous), two young (Hamburg Museum Cat. No. K7559) ; one male and 

 one ovigerous female, Allan Hancock Foundation. 



Diagnosis: Carapace with a tuft of plumose and non-plumose hairs 

 on front ; anterior margin of carpus with a broad, granulate- or serrate- 

 edged lobe, surface nearly smooth except near posterior margin, with 

 a few scattered, non-plumose setae ; manus nearly smooth, covered with 

 long, stiff, non-plumose setae ; walking legs with wide-set plumose hairs 

 and long, stiff, non-plumose setae; telson seven-plated in males, five- 

 plated or incompletely seven-plated in females; a pair of pleopods in 

 male. 



Description: Carapace about as broad as long, slightly broader (1.1 

 times) in females; strongly convex front to back, surface uneven, re- 

 gions distinct, plicate on posterolateral regions, otherwise covered with 

 punctae and short rugae ; front with a tuft of plumose and non-plumose 

 hairs, carapace otherwise naked except for vestigial hairs arising from 

 punctae and rugae. Front rounded in dorsal view, trilobate in frontal 

 view, the median lobe rather strongly produced. Outer orbital angles 

 produced into a small tooth. Side wall rugose, covered with long plumose 

 hairs; separated portion consisting of numerous small pieces. 



First movable segment of antenna lightly granular, with a low tu- 

 bercle on anterior margin ; second and third lightly granular, without 

 projections; flagellum naked. Outer maxillipeds lightly rugose, ischium 

 covered with long plumose hairs. 



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

 subtriangular lobe on anterior margin ; a fringe of plumose hairs near 

 posterior margin ; ventral surface smooth. Anterior margin of carpus 

 produced into a rounded, granulate- or serrate-edge lobe, not cut into 

 teeth; lobe and anterior two-thirds of surface nearly smooth, covered 

 with very short rugae similar to those of carapace, and with small pro- 

 jecting granules, forming irregular longitudinal rows, near posterior 

 margin; a few scattered non-plumose setae on carpus and lobe; ventral 

 surface smooth. Manus nearly smooth, except for a few small, strongly 

 projecting tubercles; covered with very short rugae, granular toward 

 outer margin, the granules projecting there to form a serrate edge; 

 surface rather thickly covered with long, stiff, non-plumose setae; ven- 



