1925). One-half to 28 fathoms, rarely to 120 

 fathoms. 



Type locality. — Guadeloupe, in cavities of the 

 keys. 



Known range. — Off Beaufort Inlet, N.C., to 

 west Florida; Vera Cruz, Mexico; West Indies 

 to Islet of Sao Sebastiao, Sao Paulo, Brazil. 



Remarks. — Ovigerous females are known from 

 May to November in the Bahamas and Florida, 

 and in December from Brazil (Rathbun, 1925, 

 and U.S. National Museum records) . 



Genus Tyche Bell, 1835 



Garth, 1958, p. 172. 

 Tyche emarginata White 



Figures 225, 226, 233B 



Tyche emarginata White, 1847a, p. 206. — nay and Shore, 1918, 

 p. 461, pi. 39, fig. 4.— Rathbun, 1925, p. 508, pi. 272; pi. 273, 

 figs. 7-12 (rev.).— Garth, 1946, pp. 406-408, text-fig. 1. 



Recognition characters. — Carapace oblong-oval, 

 flattened, with lamellate expansions in front 

 covering ocular peduncles, and another prolonged 

 and bilobed behind, stout hooked hairs on rostrum 

 and prominent elevations. Front wide, with four 

 long horns, lateral horns forming anterior angles 

 of orbit, divergent, longer and more elevated than 

 median rostral horns. Ocular peduncles entirely 

 uncovered below. Gastric region swollen, with 



Figure 225. — Tyche emarginata White. Male in dorsal 

 view, legs of left side not shown, 5 mm. indicated. 



Figure 226. — Tyche emarginata White. Left 

 outer ruaxilliped (after Garth, 1946). 



three low tubercles, two anterior, and a third 

 posterior and median; cardiac region depressed, 

 with three small tubercles. Lateral borders 

 straight and nearly parallel at hepatic regions, 

 rounded at branchial regions. Dorsal surface of 

 hepatic region concave; branchial region with 

 large tubercle on anterior lobe, and a prominent 

 tuberculate crest above lateral margin. Exopodite 

 of third maxilliped with basal protuberance re- 

 curving to cover base of ischium, merus inserting 

 deeply into outer distal portion of ischium by 

 similar but less developed process, inner margin 

 of ischium strongly dentate. 



Chelipeds of male more than twice length of 

 post orbital part of carapace; palms somewhat 

 dilated and compressed; fingers gaping at base, 

 dentate throughout length. Walking legs orna- 

 mented with stout hooked hairs; dactyls spinulous 

 on middle third, spinules increasing in size distally. 



Abdomen of both sexes with seven free seg- 

 ments. 



Measurements.— Carapace : female, length, 35 

 mm. ; width, 21 mm. 



MARINE DECAPOD CRUSTACEANS OF THE CAROLINAS 



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