Boone, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 127 



teeth, of which the second from base is much the largest; the fingers 

 interlock closely, without gaping. 



The ambulatories are slender, the meral joint especially compressed 

 laterally, relatively smooth, fitting closely upon those of the adjacent 

 legs, except that of the fifth leg, which is eroded on the exposed upper 

 surface; the carpal joint is not half as long as the meral, flattened 

 on its inner or anterior lateral surface, its upper and outer surface 

 rounded and deeply eroded ; the propodus is shorter than the carpus, 

 nearly square, its upper surface deeply eroded ; the dactyl is one-third 

 longer than the propodus, much slenderer, yet stocky, tapering, with 

 a very sharp, brown, claw-like tip. The lateral margins of the legs 

 are fringed with fuzzy setae, as are also the sidewalls of the carapace. 



Synonymy. — Cancer vermiculatus Lamarck, Hist. Anim. sans Vert., 



vol. 5, p. 271. 

 Xantho vermiculatus H. Milne Edwards, Hist. Nat. Crust., vol. 1, p. 



391, 1834. 



Glyptoxanthus vermiculatus A. Milne Edwards, Miss. Sci. au Mex. 

 et dans L 'Amerique Centrale, t. V., p. 255, pi. 43, fig. 2, 1881. 



Genus: HETEKACTEA Lockington. 

 Heteractea lunata (Milne Edwards and Lucas). 



Plate 40, fig. A. 



Diagnostic characters: The only West American species of the 

 genus so far known, with the outer and upper faces of the chelipeds 

 covered with large, rounded tubercles set in a dense pilosity ; the an- 

 terior part of the carapace also with pilosity. 



Type: The type was taken at Valparaiso, Chile, and is deposited 

 in the Paris Museum. 



Distribution : Known from the tidal zone, from San Diego, Cali- 

 fornia, to Chile. 



Material examined: One ovigerous female, probably seined at 

 Punta Arenas, Costa Rica, March, 1928, by the ''Ara," William K. 

 Vanderbilt, commanding. 



Technical description : Carapace widest anteriorly, 12 mm. long, 

 15 mm. wide across the gastric region; interorbital width 6 mm.; 

 frontal margin and superior orbital margin forming a conspicuous 



