. Bulletin - United States National Museum. Science. THE SPIDER CRABS OF AMERICA 211 Amathia agassizii Smith, Bull. Mus. Comp. Zool., vol. 10, 1882, p. 1, pi. 2, figs. 2 and 3 (type-locality, off Charleston, South Carolina, lat. 32° ' N.; long. 77° 42' 30" W., 262 fathoms; type in Mus. Comp. Zool.); Proc. U. S. Nat. Mus., vol. 6, 1883, p. 3; Kept. U. S. Commr. of Fish and Fish- eries for 1882 (1884), p. 346 [2]. Anamathia crassa Smith, Proc. U. S. Nat. Mus., vol. 7, 1884 (1885), p. 493.—Rathbun, Proc. U. S. Nat. Mus., vol. 17, 1894, p. 60, pi. 1, fig. 4; Bull. Lab. Nat. Hist. State Uni
. Bulletin - United States National Museum. Science. THE SPIDER CRABS OF AMERICA 211 Amathia agassizii Smith, Bull. Mus. Comp. Zool., vol. 10, 1882, p. 1, pi. 2, figs. 2 and 3 (type-locality, off Charleston, South Carolina, lat. 32° ' N.; long. 77° 42' 30" W., 262 fathoms; type in Mus. Comp. Zool.); Proc. U. S. Nat. Mus., vol. 6, 1883, p. 3; Kept. U. S. Commr. of Fish and Fish- eries for 1882 (1884), p. 346 [2]. Anamathia crassa Smith, Proc. U. S. Nat. Mus., vol. 7, 1884 (1885), p. 493.—Rathbun, Proc. U. S. Nat. Mus., vol. 17, 1894, p. 60, pi. 1, fig. 4; Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 1898, p. 254, pi. 1.— Faxon, Mem. Mus. Comp. Zool., vol. 18, 1895, p. 10. Anamathia agassizii Smith, Proc. U. S. Nat. Mus., vol. 7, 1884 (1885), p. 493; Rept. U. S. Commr. of Fish and Fisheries for 1885 (1886), p. 624 [20], pi. 1, figs. 2, 3, 3a. Scyramathia agassizi Saks, Norske Nordhavs Exped., Crust., vol. 1, 1885, p. 274. Diagnosis.—Median spines 6; gastric spines 6; a prominent tooth at angle of buccal cavity; 2 spines on basal antennal article; a stout spine at extremity of merus of ambulatory legs. Description.—Carapace very convex in both directions with a tendency to median carination; surface pubescent. Median spines, 6 (2 gastric, 1 genital, 2 cardiac, 1 intestinal); a spine (paired) beside each of the median gastric spines; the anterior of the median spines forms the first of an oblique row extending backward to the spine at the lateral angle of the bran- chial region; a prominent, marginal hepatic spine; three small spines form a triangle on the inner portion of the branchial region. Above the posterior margin there is a small spine on each side of the middle, and over the bases of the last two legs, a row of six or more spinules; above the anterior of these an irregular row of spines extends forward to the anterior angle of the buccal cavity. Spines of rostrum stout, gradually tapering, acumi- nate, diminishing in length with age. There
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