450 



BULLETIN 129^ UNITED STATES NATIONAL MUSEUM 



spine which does not reach beyond the orbital border and two short 



spines behind the next article. 



The chelipeds attain in the male a 

 considerable size and are nodose; arm 

 spined above; hand long, cylindrical, 

 and granulate. Fingers about half 

 as long as palm, gaping for their 

 basal half; a tooth on dactylus near 

 its base. 



Measurements. — Length of large 

 male (Cat. No. 5843) from tip of 

 rostrum to tip of posterior spine, 

 146.5; width, including spines, 93; 

 length of horn 47.2; length of 

 cheliped, 215 mm. 



Variations. — Sometimes (Cat. No. 

 25233) instead of dorsal tubercles 

 there are a few (10 or 11) sharp 

 spines. In the young the horns are 

 straight and divergent, but less 



divergent than in the subspecies coelata; with age the horns grow 



proportionally longer and are separated by a smaller angle and their 



terminal halves may become parallel or even curve inward (5843) 



or downward (49902). 



Range. — From Georgia to Bahia, Brazil. Simon's Bay, Cape 



Colony (Miers). Shallow water to 35 fathoms. 

 Material examined. — See table, pages 452-453. 



STENOCIONOPS FURCATA COELATA (A. MUne Edwards) 



Plate 164 



Fig. 131.— STENOCIONOPS FURCATA (43084), 

 MAXILLIPED, X 2.7 



Pericera coelata A. Milne Edwards, Bull. Soc. Philom., ser. 7, vol. 2, 1878, 



p. 224 (type-localities, 10 miles from the Idolos [error for "Jolbos"] 



Islands and near Havana, 175 fathoms; types in M. C. Z.). 

 Pericera caelata A. Milne Edwards, Crust. R4g. Mex., 1879, p. 200,, pi. 



15A, figs. 3-3c. 

 Pericera cornuta (?) and Pericera, sp., Kendall, Bull. U. S. Fish Comm., 



vol. 9, 1889 (1891), p. 303. 

 Pericera cornuta caelata Rathbun, Proc. U. S. Nat. Mus., vol. 15, 1892, 



p. 244. 

 Stenocionops furcata coelata Rathbun, Bull. U. S. Fish Comm., vol. 20 for 



1900, part 2 (1901), p. 73.— Hay and Shore, Bull. Bur. Fisheries, vol. 



35, 1915-16 (1918), p. 460, pi. 39, fig. 3. 



Diagnosis. — Lateral marginal spines four. From 20 to 25 dorsal 

 spines and tubercles. Horns divergent, straight, or nearly so. 



Descri'ption. — Differs from the typical form of the species in its 

 more imeven and spinose carapace, the spines and sharp tubercles of 



