THE SPIDER CRABS OF AMERICA 



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EUPROGNATHA GRACILIPES A. MUne Edwards 



Plate 34, figs. 3 and 4 



Euprognatha gracilipes A. Milne 

 Edwards, Crust. Rig. Mex., 1878, p. 

 184 (Euprognata); 1879, pi. 35, figs. 3 

 and 3a (type-locality, lat. 23° 32' N., 

 long. 88° 05' \V., 95 fathoms; cotypes, 

 Cat. No. 2881, M. C. Z.) ; Bull. Mus. 

 Comp. ZooL, vol. 8, 1880, p. 7.— 

 Rathbun, Proc. U. S. Nat. Mus., vol. 

 17, 1894, p. 56; Bull. U. S. Fish Comm., 

 vol. 20, for 1900, pt. 2 (1901), p. 58.— 

 A. Milne Edwards and Bouvier, 

 Mem. Mus. Comp. ZooL, vol. 47, 

 1923, p. 375, pi. 11, fig. 2. 



Diagnosis. — Antennal spines nearly 

 or quite as advanced as the front and 

 subparallel to each other. Interanten- 

 nular spine short. Regions surmounted 

 by a spine. Sternum forming a wide 

 crenate border around the posterior 

 portion of the carapace. 



Description. — Branchial region less 

 swollen and hepatic region more prom- 

 inent than m E. rasfellifera. Carapace 

 densely granulous, the granules of vary- 

 ing size and intermixed with tubercles, 

 of which there are five in a transverse 

 row on gastric region. Gastric, cardiac, 

 and branchial regions tipped with a 

 cj'lindrical spine; a smaller abdominal 

 spine. Hepatic margin with a stout 

 spine. Margins of branchial region and 

 ptergygostomian ridge armed with 

 smaller spines and tubercles. Front 

 having a deep median groove and ter- 

 minatmg in two small triangulate teeth; 

 spines of basal antennal article slender, 

 equaling or not quite reaching front; 

 interantennal spine very short. Supra- 

 orbital arches very thick and well 

 marked, tipped with a spine directed 

 diagonally forward and outward. 

 Postorbital spines also much more 

 oblique than in E. rastellifera. A wide 

 prominent lobe diagonally across sides 



