THE SPIDER CRABS OF AMERICA 105 



ously granulate. Postocular spines even more coarsely tuberculate; 

 when viewed from above their margins appear laciniate. 



Surface of abdomen thickly set with beadlike tubercles; the first 

 segment bears a promment granulate spine, and there is a rudimentary 

 spine on each of the three following segments. 



Chela slender (in female), covered with small tubercles; remaining 

 articles of cheliped and also ambulatory appendages furnished with 

 small spines, tubercles, and scattered curled setae. (After Faxon.) 



Measurements. — Female, cotype, length of carapace 7, width 6 mm. 



Range. — Known only from the type-locality, Cocos Island, off Bay 

 of Panama. 



Material recorded. — Near Cocos Island; lat. 5° 32' 45" N., long. 

 86° 55' 20" W.; 52 fathoms; nuilipore or rky.; 62.2° F.; February 

 28, 1891; station 3369, Albatross; 2 females, cotypes (Cat. No. 4477, 

 M. C. Z.). 



Genus COLLODES Stimpson 



Collodes Stimpson, Ann. Lye. Nat. Hist. N. Y., vol. 7, 1860, p. 193; type, C. 

 granosus Stimpson. — A. Milne Edwards, Crust. R^g. Mex., 1878, p. 

 175. — MiERS, Journ. Linn. See. London, Zool., vol. 14, 1879, p. 645. — 

 Alcock, Journ. Asiat. Soc. Bengal, vol. 64, 1895, p. 189. — Rathbun, 

 Bull. U. S. Fish Comm., vol. 20, for 1900, pt. 2 (1901), p. 55. 



Carapace ovate-triangulate. Rostrum short, entire or bifid. 

 Hepatic region convex. Postorbital process usually large, triangular, 

 not close to eye and separated from the supraorbital arch by a deep, 

 open, marginal fissure. Eyes of moderate length, partially retractile. 

 Basal joint of antenna with a terminal tooth or spine and two margins 

 more or less dentate, the inner margin in a plane at right angles to 

 the outer; flagellum longer than rostrum. Merus of outer maxillipeds 

 obcordate, deeply cut on distal margin, strongly produced at outer 

 and inner angles. Chelipeds of moderate length; merus trigonal, 

 curved. Ambulatory legs of moderate length, the first pair a little 

 longer or shorter than the second pair; third pair usually shorter 

 than either; fourth pair the shortest, dactyli very slender. 



Abdomen of male with six, of female with five segments. Surface 

 usually hairy, the hairs collecting and retaining particles of mud; 

 upper surface of legs usually furnished with curved hairs, lower 

 surface with long, straight hairs or bristles. 



Distributed on the Atlantic coast of America from S. of Marthas 

 Vineyard, Massachusetts (northern limit, lat. 40° 07' 48" N., 

 eastern limit, long. 69° 30' 00" W.), to Gulf of Mexico (eastern half) 

 and West Indies (as far as Martinique) ; also from Cape Frio, Brazil, 

 to Gulf of San Matias, Patagonia. Pacific coast of Mexico from 

 Abreojos Point, Lower California, to Cape St. Lucas and into the 

 Gulf of California. Also Malabar coast of India (Alcock). 



Bathymetric range, shallow water to 373 fathoms. 



