b. Marginal spines behind orbit four, carapace with 

 about four median spiniform tubercles 



■furcata coelata (p. 261). 

 bb. Marginal spines behind orbit three, carapace with 

 about eight median spines 



spin interna ( young ) ( p. 262) . 

 aa. Hepatic region enlarged and produced separately 

 from curve of branchial region, marginal hepatic spines 

 3 : carapace with 12 or 13 median spines 



spiniwana (adult) (p. 262). 



Stenocionops furcata coelata (Milne Edwards) 



Figures 241, 245H 



Pericera coelata Milne Edwards. 1878, p. 224. 

 Stenocionops furcata. coelata: Hay and Shore, 1918, p. 460, 

 pi. 39, fig. 3.— Rathbun, 1925, p. 540, pi. 164 (rev.). 



Recognition characters. — Carapace oblong- 

 ovate, approximately three- fourths as wide as 

 long, uneven, with strong spines and a dense cov- 

 ering of short setae and many scattered, longer, 

 hooked hairs. Rostrum consisting of two nearly 

 straight diverging horns with rows of hooked 

 setae. Orbital region broad, eyes small, retractile 

 within tubular orbits; preorbital spine strong, 

 suborbital and postorbital spines much smaller. 



Figure 241. — Stenocionops furcata coelata (Milne Ed- 

 wards). Male in dorsal view, legs of right side in 

 part after Rathbun (1925), legs of left side not shown, 

 20 mm. indicated. 



MARINE DECAPOD CRUSTACEANS OF THE CAROLENAS 

 1763-049 O— -65 18 



Basal antenna] article enlarged, armed with one 

 or two small distal spines or tubercles not visible 

 dorsally. Middorsal line with four strong spini- 

 form tubercles, one on gastric region, remainder 

 on cardiac and intestinal regions, fourth spine 

 with tip curved forward. Lateral border with 

 four stout spines, one on hepatic, remainder on 

 branchial region; in addition, two other stout 

 spines on branchial region and various smaller 

 ones toward front. Ventral surface of body, ex- 

 cept distal articles of chelipeds, closely covered 

 with bulbous setae hiding carapace. 



Chelipeds in adult males fairly large and no- 

 dose; hand long, cylindrical, and granulate; fin- 

 gers approximately half as long as palm, gaping 

 in basal half, a tooth on dactyl near base. In other 

 individuals chelae weak; fingers less than half as 

 long as palm; merus with strong spines above near 

 distal end preceded by several smaller spines. 

 Walking legs moderately elongate, more or less 

 rough with clusters of hooked hairs, articles sub- 

 cylindrical. 



Abdomen in male and female with seven dis- 

 tinct segments. 



Measurements. — Carapace: large male, length, 

 137 mm.; width, 111 mm. Length rostral horn, 

 26 mm. Carapace : smaller male, length, 91 mm. ; 

 width, 64 mm. Length rostral horn, 25 mm. 



Variations. — Large specimens have relatively 

 shorter rostral horns than smaller individuals; 

 young specimens are smoother than old ones. 



Color. — Dark red. 



Habitat. — This species is found on a variety of 

 bottoms, including fine white sand, yellow sand, 

 coarse gray sand, sand with algae, sandy shell, 

 broken shell, and coral. It has been reported most 

 often from coarse bottom (Rathbun, 1925), and 

 occurs on shelly reefs off Beaufort Inlet, N.C. 

 Shallow water near shore to 60 fathoms, rarely to 

 278 fathoms. 



Type localities. — Ten miles from Jolbos Is- 

 lands [Yucatan], and near Havana [Cuba], 175 

 fathoms. 



Known range. — Off Beaufort, N.C, to north- 

 west Florida and Alabama; Yucatan Channel; 

 West Indies to Barbados. 



Remarks. — This species is similar to the typi- 

 cal subspecies 8. f. furcata which ranges from 

 Georgia to Bahia, Brazil, in shallow water near 

 shore to 35 fathoms depth. The typical subspecies 

 has the carapace more evenly sculptured and is 



261 



