THE SPIDER CRABS OF AMERICA 457 



Material examined. — 



Off Sombrero, Florida; 54 fathoms; April 2, 1872, 5th cast; Bache, 

 Stimpson; 1 small female (1914, M. C. Z.); identified by A. Milne 

 Edwards. 



Charlotte Harbor, Florida; 50 fathoms; April 1, 1872; Bache, 

 Stimpson; 1 small female (1915, M. C. Z.) ; identified by A. Milne 

 Edwards. 



Grand Anse, Haiti; P. R. Uhler; 1 ovigerous female (1916, M. C. Z.). 



Guadeloupe; 1 male, holotype of P. spinosissima (Geneva Mus.). 



Soufriere Bay, Dominica; 60 fathoms; A. H. Verrill; 1 female 

 (32712). 



STENOCIONOPS SPINIMANA (Rathbun) 



Plate 267 

 Pericera, sp. Smith, Kept. U. S. Comrar. of Fisheries for 1885 (1887), p. 627. 

 Libinia spinimana Rathbun, Proc. U. S. Nat. Mus., vol. 15, 1892, p. 240, pi. 



30, adult (type-locality, off^Cape Lookout, N. C, 124 fathoms; holotype, 



Cat. No. 14029, U. S. N. M.). 

 Pericera atlantica Rathbun, Proc. U. S. Nat. Mus., vol. 15, 1892, p. 247, 



young (type-locality, off Key West, 45 fathoms; type. Cat. No. 15142, 



U.S.N.M.). 

 Stenocionops spinosisshna Rathbun (not Saussure), Bull. Lab. Nat. Hist. 



State Univ. Iowa, vol. 4, 1898, p. 256. — Hay and Shore, Bull. Bur. 



Fisheries, vol. 36, 1915-1916 (1918), p. 460, pi. 39, fig. 2. 



Diagnosis. — Rostro-orbital region in the adult occupying less than 

 one-fourth of total length of carapace. Median spines of carapace 

 12 or 13. Marginal hepatic spines 3. 



Description of adult. — Nearly related to S. spinosissima but differs 

 as follows: Carapace more rotund and more spinous, spines shorter 

 12 or 13 median spines, 5 gastric, 2 genital, 2 cardiac, 3 intestinal 

 other dorsal spines numerous; anterior marginal hepatic spines 3 

 the most anterior of these is small and in the very old (the largest 

 specimen examined) ma}^ disappear. Rostral horns tapering regu- 

 larly to a very slender tip instead of stout throughout; a little more 

 divergent than in spinosissima. Basal antennal article more twisted, 

 its antero-external angle more advanced and more elevated; the 2 

 outer spines subequal. 



Chelipeds much rougher than in spinosissima; merus and carpus 

 armed with numerous spines ; manus rough throughout its length, the 

 short spines (2 rows above, 1 below) of the proximal end becoming 

 spinules or sharp granules distally. 



Ambulatory legs sparingly spined, merus joints with a terminal 

 spine above; that of first leg with a longitudinal inner-upper row of 

 5 or 6 and a ring of about 4 near distal end; that of second leg with 

 a ring of 3 or 4 spines; of third and fourth legs with only 1 or 2 

 spines besides the terminal one. Three or four small spines on 

 carpus of first leg, 3 spinules or tubercles on carpus of second leg, 

 and only one on carpus of third and fourth legs. 



