160 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



tral surface with flattened granules, devoid of setae except for traces 

 near outer margins. Fingers covered with punctae and very short rugae, 

 occasionally with one or two setae, otherwise devoid of hairs. In males, 

 dactylus of major cheliped strongly curved, cutting edge with a large 

 proximal tubercle; pollex slightly curved, broad, and flattened, cutting 

 edge with a large proximal tubercle; fingers gaping except at tip, gape 

 with traces of plumose hair. In minor cheliped (males) and both major 

 and minor chelipeds (females), dactylus and pollex straight, slender, 

 without tubercles or teeth on cutting edge, meeting for entire length, 

 crossing at tips, gape without pubescence. 



Walking legs faintly rugose or punctate, all segments with an an- 

 terior fringe of wide-set plumose hairs, surface of carpus and propodus 

 with long, stiff, non-plumose setae. 



Abdomen smooth or punctate; telson of male seven-plated, that of 

 female five- or incompletely seven-plated. A pair of pleopods in male. 



Measurements: Holotype male: length 5.4 mm; width 5.9 mm. Para- 

 types: males, 3.9 and 5.9 mm; non-ovigerous female, 6.8 mm; ovigerous 

 females, 5.2 and 5.6 mm; young, to 2.8 mm. 



Color: All specimens had faded in alcohol, and no markings were 

 visible. 



Ecology: Taken at 6-8 fathoms, the bottom not recorded. 



Relationships : This new species does not closely resemble any other 

 eastern Pacific form, nor does it appear to be closely allied to any of 

 them. 



Remarks: The specific name is from the Latin sub-, somewhat, and 

 setosus, bristly. 



Range: Known only from the type locality, Puntarenas, Costa Rica. 



Pachycheles monilifer (Dana) 



Plate 33, fig. 4 



Restricted synonymy: 



Porcellana rugosimanus White, 1847, p. 63 (nomen nudum). 

 Porcellana monilifera Dana, 1852, p. 413; 1855, pi. 26, fig. 3 (type 



locality, Rio de Janeiro, Brazil). 

 Pachycheles moniliferus, Stimpson, 1858, p. 228. 

 Pachycheles monilifer, Rathbun, 1900, p. 148. 



Previous records: None from the Pacific coast. 



