Igg BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



near together on upper and posterior surfaces. Male abdomen 

 gradually tapering from fifth to seventh segment. 



Measurements. — Male (55193), length of carapace to tip of spine 

 15.2, width 12.6 mm. 



Range. — North Carohna to Barbados; 15 to 127 fathoms. 



Material examined. — See table 58, page 188. 



ILIACANTHA INTERMEDIA Miers 



Plate 54, Figures 1, 2 



Iliacantha intermedia Miers, Voyage of H. M. S. Challenger, Brachyura, vol. 17, 

 p. 302, pi. 26, fig. 3, 1886 (type locality, Bahia; type in Brit. Mus.).— 

 Hay and Shore, Bull. U. S. Bur. Fisheries, vol. 35 (1915-16), p. 424, pi. 

 32, figs. 3, 3a, 1918. 



Diagnosis. — Carapace coarsely granulate. Fingers much shorter 

 than palm. 



Description. — Similar to I. subglobosa but with more coarsely 

 granulate carapace; posterior marginal spines short, flat, triangular, 

 connected by a prominent line of granules. Intestinal region not 

 protuberant above the spine. Indentations of distal end of ptery- 

 gostomian channel wider and deeper than in subglobosa. Chelipeds 

 slender; merus cylindrical and granulate, granules much coarser 

 proximally; chela nearly as long as carapace, manus smooth, more or 

 less club-shaped, somewhat inflated proximally but tapering rapidly 

 to the very slender fingers which are about half the length of palm, 

 incurved at tip and denticulate on their occludent margins. Male 

 abdomen widening at sixth segment, which has convex sides. 



Color. — Gray, without markings of any kind (Hay and Shore). 



Aleasurements.—Yemsile, St. Thomas (Copenhagen Mus.), length 

 of carapace 26.6, width 21 mm. 



Range. — North Carolina to Bahia, Brazil; 5}^ to 20 fathoms. 



Material examined. — See table 59, page 189. 



ILIACANTHA LIODACTYLUS Rathbun 



Figure 41; Plate 55, Figures 1, 2 



Iliacantha liodactylus Rathbun, BuU. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 

 p. 291, pi. 8, fig. 2, 1898 (type locality, north of Trinidad, West Indies; type, 

 immature male, U. S. N. M. no. 20327). 



Diagnosis. — Three posterior acute spines; fingers as long as or a 

 Uttle longer than palm. Inner tooth of pterygostomian margin small, 

 outer sinus large. 



Description. — Carapace longer than wide, not counting spine; 

 granules small, prominent and distant, intervening space minutely 

 punctate. Lateral margin a definite line of crowded granules, hepatic 



