COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 169 



flattened granules, dactylus nearly smooth. Entire surface of chelipeds 

 with short plumose hairs, arising in groups from the distal end of each 

 granule ; usually these hairs vestigial and visible only under high magni- 

 fication, so that chelipeds appear naked or nearly so, but in occasional 

 specimens forming a short pile obscuring the granules; at greatest 

 length this pile extending about half the length of the pollex. Fingers 

 meeting only at tip in major cheliped, for entire length in minor 

 cheliped ; gape filled with a thick pubescence, more pronounced in ma- 

 jor cheliped, on cutting edge of pollex extending nearly to tip. 



Merus of walking legs with a thick fringe of long plumose hairs 

 on anterior margin; carpus and propodus thickly covered with similar 

 hairs. 



Telson of abdomen with seven plates. A pair of pleopods in male. 



Material examined: See Table 52. 



Measurements: Males, 5.1 to 20.7 mm; non-ovigerous females, 4.0 

 to 14.9 mm; ovigerous females, 7.5 to 20.5 mm. The maximum lengths 

 for male and ovigerous female were attained by specimens from the 

 Lund University Chile Expedition (Haig, 1955). 



Color: "Spotted with brownish black of different shades and a light 

 red tint, carpus brownish, apex of fingers approaching vermilion." 

 (Dana, of preserved specimens) Some of the specimens examined by 

 the writer were a pale yellow-buff, while others had a pinkish tinge. 

 In a few individuals there were small, pale orange spots on the carapace 

 and abdomen. 



Ecology: Pachycheles grossimanus seems to occur almost exclusively 

 in the intertidal zone; two specimens were dredged by the Lund Uni- 

 versity Chile Expedition at Canal Chacao in 40 meters (22 fathoms) 

 from a bottom of small stones. The species has been reported under 

 stones, from holdfasts of algae (Macrocystis and Lessonia), and from 

 the hull of a barge. 



Ovigerous females have been taken in January, February, May, 

 June, July, October, and November. 



Range: San Lorenzo, Peru, south to Canal Chacao, Chile. Shore; 

 exceptionally to 22 fathoms. 



