THE SPIDER CRABS OF AMERICA 



87 



of horns is 8 mm., length on median line to base of horns, 6.7 mm., 

 width of carapace 6.2 mm. 



Range. — Known only from Stimpson's description of the type- 

 specimen, which no longer exists.* 



EUCINETOPS PANAMENSIS Rathbun 



Plate 23, figs. 3 and 4 



Eucinetops panamensis Rathbun, Proc. Biol. Soc. Washington, vol. 36, 1923, 

 p. 73 (tj'pe-locality. Pearl Islands, Bay of Panama; holotype. Cat. No. 

 2040, M. C. Z.). ' 



Diagnosis. — Rostral horns widely separated, tipped with a spine. 

 Carapace tuberculate. Eyes extending slightly beyond postorbital 

 tooth. 



Fig. 22.— Eucinetops panamensis, male (55120). a. Left chela, X 24. 6. Rostrum, X 17.6 



Description. — Carapace high on the median line where it is strongly 

 tuberculate; three large tubercles cover the cardiac region while a 

 smooth oblong tubercle forms a bridge to the gastric region ; a large, 

 median intestinal tubercle. Branchial 

 regions also tuberculate. Lateral angle 

 marked by a small but strong spine; 

 antero-lateral margin nearly straight, 

 tuberculate, interrupted slightly between 

 the hepatic and branchial regions. Ros- 

 trum one-third as wide as the fronto- 

 orbital distance, divided less than half 

 way into two shallow triangular teeth, 

 each tipped with a small sharp curved 

 spine. Postocular tooth large, triangu- 

 lar, almost equilateral, obliquely up- 

 turned. Eyes exceeding postocular tooth 

 by little more than length of cornea; 

 stalks not tapering. First movable seg- 

 ment of antenna very large, as wide as 

 half the rostrum, furnished on its antero- 

 external mai-gin with a row of long hairs. 



Chelipeds shorter than next leg, chelae tapering distally, fingers 

 narrowly gaping in proximal half. Ambulatory legs hairy; dactyli 

 strongly curved, terminating in long, pale, horny spines. 



Fig. 23.— Eucinetops panamensis, male 

 (55120), maxilliped, x 29.5 



