THE GRAPSOID CRABS OP^ AMERICA. 818 



Inner margin of arm produced in a triangular lamina. Surface of 

 cheiiped very rough, the palm covered with coarse scaly granules, 

 which are continued partl}'^ on the fingers. There is an oval gape at 

 the base of the fingers. 



Third leg twice as long as the carapace, its merus two and two- 

 thirds times as long as wide. The merus joints do not diminish in 

 width from the middle to the distal end. 



Color. — Dull blackish; claws orange red; eyes green (A. H. Yer- 

 rill). 



Measurements. — Male holotype, length of carapace 26.5, greatest 

 width of same 26.3, anterior width 24.7, width of front 14.1 mm. 



Habitat. — Lives on steep muddy banks of rivers in small deep 

 holes, which it burrows in the soft earth at the water's edge :iiid into 

 which it retreats when alarmed. Found in most of the rivers of 

 Jamaica where the water is brackish ( Jarvis) ; also on mangroves. 



Ranye. — West Indies. Turbo, Panama (M. C. Z.)- Al^o Goi-et'. 

 Senegal. 



Material exarmned. — 



Baracoa, Cuba; Feb. 1, 1902; Wm. Palmer; 1 female (25550). 



Rio Cobre (St. Catherine), Jamaica; P. W. Jarvis; 1 male (holo- 

 type of S. hronieliarum) . 1 female (19406): 2 males, 2 females 

 (\94i8). 



Interior of Jamaica; E. A. Andrews; 1 female (17003). 



Santo Domingo, West Indies; 1878; W. M. Gabb; 1 male (3193). 



Porto Rico: Biol. Survey, U. S. Dept. Agriculture; Anasco and 

 Bayamon, in bird stomachs; specimens in collection of Biol. Sur- 

 vey. Gundlach. collector (4801, Berlin Mus.). 



Dominica, West Indies; A. H. Verrill; 1 male (32715). 



Laiou, Dominica; J. G. Ramage; 12 specimens (88.26, Brit. Mus.). 



Martinique; M. A. Rousseau; 2 females (Paris Mus.). 



Port Castries, St. Lucia; Albatross; 2 males, 1 female (22108). 



Goree, Senegambia; M. Robert; 1 male, 1 female (cotypes), 

 (20311). 



SESARMA (HOLOMETOPUS) FESTAE Nobili. 



Sesarnm, (HoJometopns) festae Nobili, Boll. Mus. Zool. Auat. Comp. R. 

 Univ. Torino, vol. 16, No. 415, 1901, p. 42 (type-localities, Tnm.ico, 

 Colombia, and Esmeraldas, Ecuador; tj'pes in Turin Mus.). 



Diagnosis. — Near angmtum. Carapace wider than long. Upper 

 margin of hand with a small, denticulated crest. 



Description. — Lateral margins of carapace almost a straight line, 

 spreading a little posteriorly. Tooth at outer angle of orbit acute, 

 directed forward and slightly inward. Front vertical, rather high, 

 lower border with a deeply sinuous crest; frontal lobes subequal, 



