214 BULLETIN 1G6, UNITED STATES NATIONAL MUSEUM 



CALAPPA GALLUS (Herbst) 



Yellow Box Crab 

 Plate 65, Figures 2, 3 



Cancer gallus Herbst, Versuch einer Naturgeschichte der Krabben und Krebse, 



vol. 3, pt. 3, pp. 18 and 46, pi. 58, fig. 1, 1803 (type locality, East Indies; 



type not extant) . 

 Cancer (Calappa) gallus Latreille, in Cuvier, Regne animal, ed. 2, vol. 3, p. 24, 



1817. 

 Calappa gallus Milne Edwards, Histoire naturelle des Crustaces, vol. 2, p. 



105, 1837.— Rathbun, BuD. U. S. Fish Comm., vol. 20 (1900), pt. 2, p. 85 



1901.— MoNOD, Bull. Soc. Sci. Nat. Maroc, vol. 8, p. 116, figs. 2B, 3, 9D, 



1928. 

 Calappa galloides Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, p. 71 [25], 



1859 (type locality, Florida Keys; type not extant). 

 Calappa squamosa Desbonne, in Desbonne and Schramm, Crustaces de la 



Guadeloupe, etc., p. 51, pi. 6, 1867. 

 Calappa gallus var. licornis Miers, Crustacea, in Report on the zoological col- 

 lections made in the Indo-Pacific Ocean during the voyage of H. M. S. 



Alert, p. 550, 1884 (type locality. Providence Island, 19 fathoms; type in 



Brit. Mus.). 

 Calappa gallus var. galloides A. Milne Edwards and Botjvier, Mem. Mus. 



Comp. Zool., vol. 27, no. 1, p. 122, 1902. 

 Calappa gallus var. capellonis Laurie, Brachyura, in Herdman's Reports to the 



Government of Ceylon on the Pearl Oyster Fisheries of the Gulf of Manaar, 



Suppl. Repts. no. 40, p. 354, 1906. 



Diagnosis. — A deep hollow between gastric and hepatic regions. 

 Between the hollows two transverse rows of four tubercles each, the 

 outer tubercles of the hind row much the largest. Posterior third of 

 carapace covered with short transverse granulated rugae. 



Description. — Extreme length of carapace varying from about 

 three-fourths to five-sixths of breadth; anterior two-thirds covered 

 with tubercles, posterior one-third with short, transverse, granulate 

 ridges; anterolateral margin crenulate; posterior border slightly 

 arcuate, finely beaded, unarmed; clypeiform expansions well devel- 

 oped, bearing six strong teeth with beaded edge, two teeth behind 

 and three in front of posterolateral tooth. Orbits directed forward, 

 only slightly upward. Kostrum wholly in advance of orbits, laminate, 

 and with four subequal, blunt teeth. Hepatic region defined by 

 furrows; a large median tubercle in front of cervical suture. Upper 

 surface of wrist tuberculate. Winglike expansion near end of arm 

 4-toothed. About 10 tubercles on upper half of outer surface of 

 palm; on the lower half the tubercles widen into crenulate laminae; 

 on and near the fixed finger are small, round, flat tubercles. 



Color.- Upper parts generally orange to orange-brown, becoming 

 brighter on front of chelae; under parts dull yellow. Carapace above 

 and front of chelae covered with irregular spots of dark red or reddish 

 brown, variable in size and form; many of the larger granules and 

 tubercles of carapace white, especiall}' those that lie in rows on the 

 posterior transverse ridges and those on the scattered elevations. 



