348 



BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Vca latis MILNE EDWARDS, Hist. Nat. Crust., vol. 2, 1S37, i>. 22, male (type- 

 locality, Antilles ; type in Paris Mus.) ; Iccvis in index, vol. 3, 1840, 

 p. G3S. 



Vca cordata WHITE, List Crust. Brit. Mus., 1847, p. 31. SMITH, Trans. 

 Connecticut Acad. Arts and Sci., vol. 2, 1SG9, pp. 13 and 36. YOUNG, 

 Stalk-eyed Crust. Brit. Guiana, 1900, p. 250, pi. 1 (male, colored plate). 



Oca f)Uofiii>cs GILL, Ann. Lye. Nat. Hist. New York, vol. 7, 1859, p. 43 

 (type-locality, St. Thomas; type not extant). 



Vcides cordatus RATHBUN, Ann. lust. Jamaica, vol. 1, 1897, p. 25. 



Oediplcura cordata OKTMANN, Zool. Jahrb., Syst., vol. 10, 1897, p. 336. 



Diagnosis. Carapace of male about one and one-fourth times as 

 wide as long. Jugal region almost smooth. Lower margin of palm 

 convex. First pair of legs of adult male the longest. 



Description. Carapace naked and smooth above, very broad, the 

 greatest breadth much anterior to the middle, very convex fore and 

 aft. Cervical suture very distinct. Gastric 

 region broad and flattened in the middle, tho 

 protogastric subregions only partially separated 

 from the mesogastric, the posterior part of 

 which is rounded and slightly protuberant but 

 still lower than the branchial regions. A deep 

 furrow either side of the cardiac region. 

 Branchial regions swollen, evenly rounded 

 above, lateral margins very convex anteriorly, 

 and indicated by a very slight denticulated 

 ridge. Fronto-orbital border edged by a sharply 

 raised rim; front lobiform, almost perpendicu- 

 lar. Orbit more than twice as long as it is high, 

 with a broad and deep hiatus, over which pro- 

 jects the blunt outer angle ; lower margin nearly 

 straight and formed of two nearly parallel 

 ridges, the lower of which is armed with a line 

 of small tubercles, and the upper irregularly 

 granulous. Inferior orbital region smooth, separated by a deep 

 sulcus from the buccal area. Inferior lateral regions swollen and 

 nearly smooth, only a few low granules near the orbital region. A 

 ridge on each side of the buccal area is armed with a few small 

 tubercles. 



Chelipeds very unequal, the greater one very large. Merus stout, 

 the inferior angles armed with sharp spines, superior angle coarsely 

 granulous. Inner margin of carpus rounded and armed with spines; 

 distal margin below also armed with spines. Hand as long as, or 

 longer than broad, spinous on the upper margin and inside, lower 

 margin granulous, outer surface smooth. Fingers thick, curving 

 toward each other, gaping, inner margins spinous. tips slightly 

 excavate. 



FIG. 158. UCIDES COK- 

 DATUS, AKDOMEN OF 



MALE (17595), NAT- 

 UOAL SIZE. 



