No. 10 GARTH : BRACHYURAN FAUNA OF THE GALAPAGOS 507 



62-33. Black Bight, Albemarle Island, shore, Feb. 8, 1933, 2 males. 

 68-33. South of Cape Berkeley, Albemarle Island, shore, Feb. 10, 



1933, 3 males, 4 females. 

 69-33. Albemarle Point, Albemarle Island, shore, Feb. 11, 1933, I 



female. 

 82-33. Conway Bay, Indefatigable Island, shore, Feb. 17, 1933, 2 



males. 

 85-33. North Seymour Island, shore, Feb. 18, 1933, 1 male. 

 153-34. Mangrove Point, Narborough Island, shore, Jan. 14, 1934, 



1 male, 2 females. 

 179-34. Bartholomew Island near James Island, shore, Jan. 23, 1934, 



1 ovig. female. 

 184-34. James Bay, James Island, shore, Jan. 24, 1934, 1 ovig. female. 

 306-35. Marchena Island, shore, Dec. 2, 1934, 1 female (photo- 

 graphed ) . 

 314-35. Academy Bay, Indefatigable Island, shore, Dec. 7, 1934, 1 

 ovig. female. 

 Measurements. — Largest specimen, female: length 30 mm, width 

 38 mm, cheliped 50 mm, chela 25 mm, dactyl 15.7 mm. 

 Habitat. — Rocky shore, above water line (spray zone). 

 Depth. — Shore. 



Remarks. — G. lividus is a most secretive species in comparison with 

 Grapsus grapsus, dwelling in crevices above the water line and darting 

 into some deep recess upon the slightest sign of danger. Only the glint of 

 the long, yellow hairs with which the walking legs are liberally provided 

 reveals the hiding place of the species. 



Genus PACHYGRAPSUS Randall, 1840 



Pachygrapsus transversus ( Gibbes ) 



Plate 87, Fig. 2 



Grapsus transversus Gibbes, Proc. Amer. Assoc. Adv. Sci., vol. 3, p. 181, 

 1850. 



Pachygrapsus transversus Gibbes, Proc. Amer. Assoc. Adv. Sci., vol. 3, 

 p. 182, 1850. Rathbun, Proc. Washington Acad. Sci., vol. 4, no. 8, 

 p. 279, 1902; Bull. 97, U.S. Nat. Mus., p. 244, pi. 61, figs. 2 and 3, 

 and synonymy, 1918. Boone, Zoologica, vol. 8, no. 4, p. 253, fig. 92, 

 1927. Finnegan, Journ. Linn. Soc. London, vol. 37, p. 649, 1931. 

 Sivertsen, Med. fra det Zool. Mus., Oslo, nr. 38, p. 19, 1933. 

 Schmitt, Smithsonian Misc. Col., vol. 98, no. 6, p. 25, 1939. 



