262 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



twice the diameter of the legs; hand not much thicker than preceding 

 joints; palm less than twice as long as broad, nearly twice as long as 

 fingers. (After Caiman.) 



^' Measurements. — Length of carapace of female (69177) 5.8, width 

 5.5 mm. 



Eange. — Indian Ocean, Torres Straits, Palmyra Island, and gen- 

 erally tlirough the Pacific northward to Hawaii. Philippines (Sem- 

 per). Colombia, South America; Secas Islands, Panama (Hancock 

 Galapagos Expedition) . The female crab forms galls on certain species 

 of corals of the genera Pocillopora, Seriatopora, Siylophora, Sideropora 

 and Millepora (Edmondson), Coral-galls, possibly due to this species, 

 are known from the Red Sea, Ceylon, and China Sea (Caiman). 



Material examined. — See table 86, page 261. 



Genus CRYPTOCHIRUS Heller 



{Jryptochirus Heller, Verb, zool.-bot. Ges. Wien, vol. 11, abh., p. 19 [17], 1861 

 (type, C. coralliodytes [later and obviously corrected spelling]); Sitzb. Akad. 

 Wiss. Wien, vol. 34, abt. 1, p. 366, 1861. 



Lithoscaptus A. Milne Edwards, Ann. Sci. Nat., Zool. (ser. 4), vol. 17, p. 362, 

 1862 (type, L. paradoxus Milne Edwards); in Maillard, Notes sur I'lsle de 

 la Reunion, pt. 2, annexe F, p. 10, 1862, and ed. 2, vol. 2, annexe F, p. 10, 

 1863. 



Troglocarcinus Verrill, Trans. Connecticut Acad. Arts and Sci., vol. 13, p. 

 427, 1908 (type, T. corallicola Verrill). 



Front of carapace abruptly bent downward and operculum-like ; 

 anterolateral margin and front denticulate. Eyes not retractile; 

 orbits feebly developed, a spine on outer margin. 



Bermudas, Straits of Florida, West Indies; Gulf of Guinea. 



CRYPTOCHIRUS CORALLICOLA (Verrill) 



Figure 47; Plate 78, Figures 5-7 



Troglocarcinus corallicola Verrill, Trans. Connecticut Acad. Arts and Sci., vol. 



13, p. 427, fig. 48, 49, a, b, c; pi. 28, fig. 8, 1908 (type locality, Dominica, 



B. W. I.; type in Peabody Mus., Yale Univ.). — Balss, Crust. VII in 



Michaelson, Westafrika, vol. 3, lief. 3, p. 87, 1922. 

 ■Cryptochirus corallicola Edmondson, Occ. Pap. B. P. Bishop Mus., vol. 10, no. 5, 



p. 5, 1933.— Shen, Hong Kong Nat., suppl. 5, p. 22, 1936. 



Description. — Carapace oblong, transversely convex; sides nearly 

 parallel posteriorly; front bent abruptly downward and covered with 

 small, imequal, sharp spinules and hairs to which dirt, etc., firmly 

 adheres; front edge minutely notched at middle and finely spinulated; 

 anterolateral margin with a row of fine sharp spinules; upper surface, 

 back of the frontal bend, haiiy and granulated, the granules larger 

 anteriorly and toward the sides; minute posteriorly. The sloping 

 anterior part of the carapace has a concave area each side of the 

 median hne. The anteromarginal spines decrease in size backward; 



