No. 10 GARTH : BRACHYURAN FAUNA OF THE GALAPAGOS 415 



Numerous tiny and larger red spots appear in groups and scattered on 

 carapace, but none on ambulatory legs, which are nearly white; merus 

 banded with chrome orange, nail of dactyl yellow. (Petersen) 



Habitat. — Sand, sand and shell, sand and nullipore, sand and coral. 



Depth.— 9-SO fms. 



Remarks. — M. bellii is now recorded from the Galapagos Islands. 



Genus AETHRA Leach, 1816 



Aethra scruposa scutata Smith 



Plate 70, Figs. 1, 2 



Aethra scutata Smith, Amer. Journ. Sci., ser. 2, vol. 48, p. 120, 1869. 

 Oethra scruposa, var. scutata A. Milne Edwards, Crust. Reg. Mex., p. 



170, pi. 31, figs. 2-2e, 1878. 

 Aethra scruposa scutata Rathbun, Bull. 129, U.S. Nat. Mus., p. 552, pi. 

 195, and synonymy, 1925. 



Type locality. — La Paz, Lower California. 



Type.— In Yale Univ. Mus. 



Range. — From La Paz, Lower California (Smith), to Mazatlan (A. 

 Milne Edwards). 



Diagnosis. — Carapace transversely elliptical, margins thin, expanded 

 to conceal legs and cut by closed fissures into numerous broad teeth. 

 Margins of chelipeds and ambulatory legs produced, dentate. 



Material exajnined (4 specimens from 2 stations). — 

 28-33. Gardner Bay, Hood Island, 2 fms, Jan. 25, 1933, 1 male. 

 796-38. Sulivan Bay, James Island, shore, Jan. 21, 1938, 1 male, 2 

 females (1 photographed). 



Measurements. — Largest specimen, male: length 63.0 mm, width 

 97.1 mm, cheliped (rigid) coxa to elbow 34 mm, elbow to tip of dactyl 

 42 mm, chela 36.3 mm, dactyl 23.4 mm. 



Color in life. — The appearance of the carapace is that of a much 

 eroded rock encrusted with coralline algae. 



Habitat. — Under rocks at low tide. 



Depth. — Strictly a shoreline species. 



Remarks. — For five years a single, very large male from Hood Island 

 was the only representative of this species in Hancock collections, despite 

 repeated collecting over the same territory. Then, in 1938, an exceptional 

 tide at Sulivan Bay gave Velero HI collectors three more specimens, in- 

 cluding females, along with more of the equally desirable Glyptoxanthus 

 hancocki Garth (1939) and Daldorfia garthi Glassell (1940), all three 

 of which occupy extremely low tide levels. 



A. scruposa scutata is now recorded from the Galapagos Islands. 



