OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 211 



33.9, width at middle 39.8, greatest widtli 42.2, width at postero- 

 lateral angles 39.4 mm. 



Range. — From North Carolina to Grenada; 7K to 115 fathoms. 



Material examined. — See table 68, page 212. 



CALAPPA SULCATA Rathbun 



Plate 64, Figures 7, 8; Plate 65, Figure 1 



Calappa sulcata Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, p. 

 289, pi. 9, figs. 3, 4, 1898 [type locality, off Delta of the Mississippi, 35 fath- 

 oms (14941)]; BuU. U. S. Fish Comm. for 1900, vol. 20, pt. 2, p. 85, 1901. 



Diagnosis. — Carapace with a prominent horizontal tooth at either 

 end of posterior margin. A sharp spine at angle of posterolateral 

 wing and another at proximal end of manus. 



Description. — Extreme width of carapace little greater than 

 extreme length. Upper surface of carapace finely granulate; five 

 prominent longitudinal rows of tubercles; anterolateral border with 

 about 14 crenulations, granulate on edge. Posterior margin with a 

 large triangular prominent tooth at either end. Posterolateral wings 

 subrectangular, a large spine at angle, in front of which are three 

 teeth diminishing in size; on the posterior edge are two larger sub- 

 equal teeth, the inner one a little the smaller. Front divided by a 

 round median notch into two teeth; a much smaller tooth at inner 

 end of orbit. The endostomial septum has a short sharp tooth 

 pointing forward and visible in front view. 



Arm expansion 4-lobed, outer lobe much the largest, prolonged 

 to a spine. Superior crest of palm "w^th six or seven teeth; outer 

 surface with a broad, nearly smooth, horizontal sulcus which distally 

 turns at an obtuse angle and terminates opposite the upper line of 

 dactylus; it is bordered for the most part by coarsely granulate 

 tubercules. 



Color. — In alcohol, light pinkish brown. Seven small and narrow 

 rings of dark red: three on carapace, one median encircling the third 

 median tubercle, counting from the front; one on each branchial 

 region, about middle of length of carapace and encircling the fourth 

 of the outermost continuous row of tubercles. One ring on each 

 wrist and one on each palm near upper margin and inclosing the 

 tubercle toward proximal end of margin; this tubercle is not in the 

 center of the ring but near its upper periphery. 



Measurements. — Female (24079), extreme length 21, width at 

 posterior lateral spines 23.8, width at sinus in front of wings 23 mm. 



Range. — North Carolina to Gulf of Mexico and Puerto Rico; 12 

 to 35 fathoms. 



Material examined. — See table 69, page 213. 



