THE CANCROID CRABS OF AMERICA 287 



Diagnosis. — Anterior border of buccal cavity almost semicircular, 

 arched upward not forward. Sternum narrow. Merus of outer 

 maxilliped elongate, anterior margin oblique, forming a tooth at inner 

 angle. 



Description. — Carapace finely punctate and obscurely granulate, 

 rather deeply furrowed, most of the furrows indicating regions and 

 subregions; three furrows run obliquely inward from the lateral mar- 

 gin and are bordered behind by granulated ridges; the two anterior 

 of these end in a small tooth not projecting outwardly beyond the 

 general margin. Still further forward on the margin is a similar tooth 

 without the accompanying ridge and furrow. Antero-lateral margins 

 thick, finely granulate, postero-lateral margins concave, smooth and 

 rough with long hair. Front and orbits finely granulate; each lobe 

 of front is subdivided forming two tuberculiform lobules at the 

 angles, median fissure closed. Inner supra-orbital tooth a little less 

 than a right angle; orbital denticles between fissures not projecting 

 into orbit, the outer one much narrower than the upper one; two 

 inferior teeth similar in shape and size, the inner one the more 

 advanced, but less so than the angle above it. 



Outer maxillipeds smooth, ischium slightly ciliated on inner border, 

 merus with a bouquet of long hairs at summit of tubercle. First 

 three articles of cheliped bristling with long hairs ; remainder smooth ; 

 fingers long, robust, strongly channeled. Legs much ciliated, merus 

 and carpus covered with a short thick tomentose velvet. Abdomen 

 ciliated in both sexes ; the sternum has here and there some bouquets 

 of hair. 



Color. — Dirty gold color; dried animal, pale red (Poeppig). Red 

 tinged with yellowish, fingers blackish brown (Milne Edwards and 

 Lucas). 



Measurements. — Holotype of P. hirtipes, length of carapace 57 

 (not 27), width of same 82 mm. (Milne Edwards and Lucas). 



Range. — From Tumbes, Peru (Lenz) to Concepcion, Chile; Juan 

 Fernandez Islands (Lenz, Balss). 



Material examined.— 



CHILE.^ — A part of two carapaces (17539). 



Valparaiso; Edwyn Reed collector; 1 ovigerous female (Buenos 

 Aires Mus., 10807). 



Genus HOMALASPIS A. Milne Edwards 



Homalaspis A. Milne Edwards, Ann. Sci. Nat., ser. 4, vol. 20, 1863, p. 279; type, 

 H. plana (Milne Edwards). 



Carapace broad, longitudinally convex; regions indistinct, not 

 lobulated. Antero-lateral borders obscurely lobed, postero-lateral 

 margins strongly convergent. Front advanced, deflexed, very nar- 

 now, not more than a sixth the greatest width of carapace, not sepa- 

 rated from the supra-orbital margin by a notch or groove. Orbits 



