COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 103 



mentum produced into a long fringe; all segments of walking legs 

 with a long fringe of hairs on anterior margin, merus unarmed, that 

 of leg 3 somewhat inflated. 



Description: Carapace nearly smooth, regions not distinct. Front 

 trilobate, the lobes rounded, about equal in breadth, lateral lobes di- 

 verging from median lobe, latter more advanced and with a distinct 

 median groove. Outer orbital angle produced into a spine-tipped tooth. 

 No epibranchial spine. Carapace completely covered with a short, fine 

 tomentum, as are the side walls of the carapace, eyestalks, movable 

 segments of antennae (except flagella), dorsal surface of chelipeds and 

 walking legs, and abdomen (except telson). 



First movable segment of antenna with a strongly projecting, lamel- 

 lar lobe on anterior margin ; second and third nearly smooth ; flagellum 

 naked. Outer maxillipeds lightly rugose. 



Chelipeds finely granular, nearly smooth. Merus with a strongly 

 projecting, broad, pointed tooth on anterior margin. Carpus less than 

 twice as long as wide, anterior margin with a strong proximal lobe, 

 anterior and posterior margins converging distally from its highest 

 point; posterodistal angle produced into a small spine. Manus with a 

 thin outer margin ; surface near outer margin with a series of three to 

 six small, low, wide-set, rounded tubercles; on outer margin of manus 

 and pollex a fringe of long plumose hairs, long non-plumose setae inter- 

 spersed with them. Fingers long and slender; gape with a short to- 

 mentum and a few long scattered setae; a few long setae on inner ven- 

 tral surface of manus and on ventral surface of dactylus. 



Walking legs nearly smooth ; merus unarmed, that of leg 3 some- 

 what inflated ; tomentum produced into a long fringe on both margins 

 of all segments. 



Material examined: See Table 30. 



Measurements: Males, 2.8 to 5.9 mm; non-ovigerous females, 3.3 

 to 3.8 mm; ovigerous females, 4.0 to 5.4 mm. Nobili recorded one of 

 the syntypes as 5.25 by 5.25 mm. One of the male syntypes examined 

 by the writer was larger than this, measuring 6.3 mm in length. 



Color: According to Nobili, who studied the type series only a 

 few years after its collection, the color was reddish-rose, the tubercles 

 near the outer margin of the manus reddish-purple. The two syntypes 

 examined by the present writer had lost all their color; the same was 

 true of all other specimens of Petrolisthes holotrichus examined. 



