DECAPOD CRUSTACEANS OF THE WEST INDIES 131 



ing unarmed under low magnification; tip usually directed laterad and 

 toward sternum. A large species, maximum carapace length in midline 

 about 55 mm. 



Habitat. — Marine and estuarine, perhaps occasionally in fresh 

 water. 



Distribution. — West Indies and British Honduras to Estado de 

 Santa Catarina, Brazil (Cuba, Jamaica, Hispaniola, Puerto Rico, 

 Saint Thomas, Saint Croix, Martinique, Saint Lucia I., Barbados, 

 Trinidad, Isla de Providencia, Isla de Utila). 



38. Callinectes exasperatus (Gerstaecker) 



Figure 37c 



Lupea exasperata Gerstaecker, 1856, p. 129 [type-locality: Puerto Cabello, 



Venezuela]. 

 Callinectes tumidus Ordway, 1863, p. 574 [type-localities: Key West, Florida, 



and Haiti]. 

 Callinectes exasperatus. — Rathbun, 1897b, p. 150; 1930, p. 130, text-figs. 15f, 



16f, 17e, 18e, pi. 56. 



Diagnosis. — Carapace \vith central trapezoidal (metagastric) area 

 nearly half as long as anterior wddth; anterolateral margins strongly 

 arched; anterolateral teeth curved forward; lateral spine usually 

 less than twice as long as posterior margin of preceding tooth. Sub- 

 median pair of frontal teeth small but distinct. First pleopods of 

 adult male slightly overlapping proximally, diverging, and then 

 abruptly recurved mesially in distal half, reaching about to suture 

 between sternites supporting third and fourth pereiopods; distal 

 portion provided with scattered minute spinules; extreme tip broaden- 

 ing slightly and obliquely truncate. A large species, maximum carapace 

 length in midline about 63 mm. 



Habitat. — Marine and estuarine, perhaps occasionally in fresh 

 water. 



Distribution. — Southern Florida to Estado do Parana, Brazil 

 (Bermudas, Cuba, Jamaica, Hispaniola, Puerto Rico, Saint Croix, 

 Saint Martin, Islas Los Roques, Isla de Providencia). 



39. Callinectes marginatus (A. Milne-Edwards) 



Figure 37d 



Neptunus marginatus A. Milne-Edwards, 1861, p. 318; pi. 30: fig. 2 [type-locality: 



Gabon, West Africa]. 

 Callinectes larvatus Ordway, 1863, p. 573 [type-localities: Key West and Dry 



Tortugas, Florida, Bahamas, Haiti]. 

 Callinectes africanus A. Milne-Edwards, 1879, p. 229 [type-locality: Cape Verde 



Islands]. 

 Callinectes larvatus var. africanus? — Benedict, 1893, p. 537. 

 Callinectes marginatus. — Rathbun, 1897b, p. 149; 1930, p. 123, text-figs. 15e, 



16d, 17d, 18c, pi. 53.— Monod, 1956, p. 208, figs. 238-239. 



