126 



BULLETIN 129^ UNITED STATES NATIONAL MUSEUM 



branchial region; also a short spine on subhepatic and on pterygosto- 

 mian region. Rostrum formed of two rounded lobes separated by ' 

 a shallow notch; its margin and the supraorbital margin denticulate. 

 Abdomen and sternum granulate, except for a transverse smooth 

 area between bases of chelipeds. 



Chelipeds a little longer than carapace, spinulous; ischium with a 

 distal spine; manus slightly compressed; fingers nearly as long as the 

 palm, gaping for nearly their whole length, a large tooth in middle 

 of pollex. 



Female: Carapace narrower behind and wider in front than male, 



tuberculation more uniform, spines less frequent. First ambulatory 



leg very little longer than second, about one and 



a half times length of the carapace. Abdomen 



tuberculate or granulate. 



Variations. — This species shows wide vari- 

 ations from the type. Stimpson described a 

 single male from south of the Tortugas as having 

 tubercles on the protuberant parts of the cara- 

 pace and the first segment of the abdomen. 

 Two males out of five from the Tortugas (47069 

 and 47070) resemble Stimpson's in having four 

 carapace tubercles but differ in having an ab- 

 dominal spine. From this there are all varia- 

 tions of roughness, from five spines in place of 

 tubercles, on the one hand, to no tubercles or 

 spines at the summit of elevations on the other. 

 The different combinations of variations in 

 this character are shown in the list of specimens (pp. 124-125), under 

 column "Variations," where the five prominences dealt with are the 

 gastric, cardiac, and branchial (paired) regions and the first abdom- 

 inal segment. 



Unique is one female out of three (23110) which bears a median 

 intestinal spine, no enlarged tubercle or spine on abdomen and four 

 tubercles elsewhere. 



Measurements. — Male (47070), length of carapace to tip of rostral 



teeth 7.2, width 6.2 mm. Female (19943), length 7, width 6 mm. 



Range. — From Cape Hatteras, North Carolina, to Gulf of Mexico 



(coast of Florida), to West Indies and Rio de Janeiro, Brazil. 



Depth, 4 to 75 fathoms. 



Material examined. — See table, pages 124-125. 



Fig. 48.— Batrachonotus 

 feagosus (47070), max- 



ILUPED, X 18.1 



