OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 205 



CALAPPA SPRINGERI Rathbun 



Plate 60, Figure 1; Plate 61, Figures 1, 2 



Calappa springeri Rathbun, Proc. Biol. Soc. Washington, vol. 44, p. 71, 1931, 

 (type localitj'. Pass a Loutre, La.; type, U. S. N. M. no. 64073). 



Diagnosis. — Allied to C.fiammea but carapace longer and narrower. 

 Posterior teeth of lateral wing pointed. The smooth longitudinal 

 strip on lower half of manus bent distally upward at an obtuse angle. 



Description. — Front shallow, median sinus obtuse-angled; orbital 

 margin flat, not prominent nor deeply interrupted. Anterolateral 

 denticles 13, shallow but definitely outlined; behind them are five 

 (not four) larger teeth, narrower at base and less produced sideways 

 than in flammea. Middle portion of posterior margin produced, 

 forming a clearly marked angle at either end; of the two large teeth 

 beyond, the outermost has a sharp tip. The granulation of upper 

 surface and of margins finer, lower and less conspicuous than in 

 flammea. The smooth area on lower half of palm is narrow proxi- 

 mally, gradually widening and is continued obliquely upward. The 

 proximal tooth of upper margin is truncate, not bifid; remaining 

 teeth flatter and wider than in flammea. Dactylus of ambulatories 

 widest at about the proximal fourth. Segment 4 of male abdomen has 

 sides nearly parallel, segment 6 is nearly as wide at distal end as at 

 proximal, terminal segment abruptly narrowed at middle to tip. 

 Terminal segment in female larger than in flammea, sides sinuous ; 

 sixth segment relatively shorter than m. flammea, sides concave. 



Color. — General back area light buff-pink or vinaceous-pink tend- 

 ing to salmon ; granules lighter. Hinder parts more whitish. Frontal 

 border dotted and shaded a light or drab Indian purple. Five small 

 spots behind front and three subparallel to anterolateral margin 

 washed-out brown or hazel. Ring in center of carapace same color. 

 Tips of five large lateral teeth white. Chelae almost iridescent 

 between granules; granules dull; superior teeth wdth Indian purple 

 spots. Inside of carpus and merus dragons blood red; purple spots 

 on merus at sinuses between teeth. (W. L. Schmitt.) 



Measurements. — Male, length 93.5, width 143 mm. Female, type, 

 length 85, width 123 mm. 



Range. — Gulf of Mexico. 



Material examined. — As foUows: 



Louisiana: Off Pass a Loutre; about 12 fathoms; 1931; Stewart 

 Springer collector, Caribbean Biological Laboratories; 1 female 

 holotype (64073). 



Florida: About 10 miles south of Tortugas; 49 fathoms; station 31 ; 

 July 2, 1932; W. L. Sclmiitt collector, Carnegie Institution; 1 male 

 (66383). 



