COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 215 



fringe of coarse clavate hairs and slender setae. Manus with three low 

 crests on dorsal surface and a fourth along outer margin, these 

 crests defined by grooves; outer margin of manus and pollex with a 

 thick fringe of coarse clavate hairs and scattered, long, slender setae. 

 Gape with a pile of short, coarse clavate hairs extending nearly entire 

 length of each finger. 



Walking legs slender, faintly rugose, covered with thick, coarse 

 clavate hairs and scattered, long, slender setae. 



Telson of abdomen with seven plates. 



Material examined: See Table 63. 



Measurements: Measurements were taken on only four Pacific spec- 

 imens: two males, 6.5 and 8.0 mm, and two non-ovigerous females, 

 7.6 and 8.4 mm. This is apparently the largest member of the genus. 



Color: The color in life has not been recorded. Some of the ex- 

 amined preserved specimens were a dark brownish-orange, with hairs 

 of about the same shade. These crabs often appear dark brown or black 

 because the hairs covering them are coated with fine silt. 



Ecology: The Velero III specimens and the one collected for the 

 American Museum of Natural History and reported by Boone (1931) 

 were taken in the intertidal zone under stones; no collecting data were 

 available for the rest of the Pacific coast material. In the Atlantic, the 

 species has been reported in the littoral among rocks and associated 

 with corals, and to a depth of 25 fathoms. 



No ovigerous females from the Pacific coast were examined. 



Remarks: The six specimens listed in Table 63 are the only ones 

 known from the Pacific coast, where the species is apparently uncom- 

 mon. 



Range: Bahia de Salinas, Costa Rica, south to San Francisco, 

 Panama. Western Atlantic, throughout the Caribbean area. 



Megalobrachium smithi (Glassell) 

 Plate 16, fig. 5 ; plate 39, fig. 2 



Pisosoma smithi Glassell, 1936, p. 286 (type locality, Miramar Beach 



near Guaymas, Sonora, Gulf of California). 

 Pisonella smithi, Glassell, 1938a, pp. 437, 442. 

 Megalobrachium smithi, Chace, 1942, p. 100. 



Previous records: Gulf of California. Punta Penasco, Sonora; Punta 

 Sargent, Sonora; Miramar Beach near Guaymas, Sonora; Isla del 

 Carmen; Isla Espiritu Santo: S. A. Glassell (Glassell 1936). 



