132 U.S. NATIONAL MUSEUM BULLETIN 292 



Callinectes marginatus var. larvatus. — Verrill, 1908, p. 368, text-fig. 22b, pi. 18: 

 fig. 1. 



Diagnosis. — Carapace with central trapezoidal (metagastric) area 

 nearly half as long as anterior width; anterolateral margins not 

 strongly arched; anterolateral teeth curved forward; lateral spine 

 slightly more than twice as long as posterior margin of preceding 

 tooth. Submedian pair of frontal teeth very small but distinct. First 

 pleopods of adult male not overlapping, distal portion curved sharply 

 laterally, not reaching beyond middle of sternite supporting fourth 

 pereiopods; terminal portion provided with scattered, extremely 

 minute spinules and tapering gradually to rather sharp tip. A moder- 

 ately large species, maximum carapace length in midline about 50 mm. 



Habitat. — Marine and estuarine, perhaps occasionally in fresh 

 water. 



Distribution. — Western Atlantic from Florida to Estado de Sao 

 Paulo, Brazil (Bermudas, Bimini Is., New Providence I., Andros I., 

 Long I., Cuba, Jamaica, Hispaniola, Puerto Rico, Saint Thomas, 

 Saint Croix, Guadeloupe, Dominica, Isla de Margarita, Islas Los 

 Roques, Curasao, Aruba, Isla de Providencia, Isla de Utila) ; eastern 

 Atlantic from Mauritania and Cape Verde Islands to northern Angola. 



40. Callinectes ornatus Ordway 



Figure 37e 



Callinectes ornatus Ordway, 1863, p. 57 [type-localities: Cumand (Venezuela), 

 Haiti, Bahamas, Dry Tortugas, and Charleston Harbor (South Carolina)]. — 

 Rathbun, 1930, p. 114, text-figs. 15b, 16a, 17a, 18b, pi. 50.— Wilhams, 1966, 

 p. 84, figs. 1, 4a, b. 



Diagnosis. — Carapace with central trapezoidal (metagastric) area 

 little more than one-third as long as anterior width; anterolateral margins 

 not strongly arched; anterolateral teeth curved forward; lateral spine 

 two and one-half to three times as long as posterior margin of preced- 

 ing tooth. Submedian pair of frontal teeth very small, almost rudi- 

 mentary. First pleopods of adult male nearly straight, overlapping 

 proximally, reaching nearly to suture between sternites supporting 

 third and fourth pereiopods; provided with scattered, small spinules 

 becoming more numerous subdistally; extreme tip bluntly lanceolate. 

 A large species, maximum length of carapace in midline about 60 mm. 



Habitat. — Marine and estuarine, occasionally in fresh water. 



Distribution. — New Jersey to Estado de Sao Paulo, Brazil (Ber- 

 mudas, Bimini Is., Eleuthera I., Andros I., Long I., Cuba, Jamaica, 

 Hispaniola, Puerto Rico, Saint Thomas, Saint Croix, Saint Martin, 

 Saint Eustatius. Guadeloupe, Saint Lucia I., Barbados, Islas Los 

 RoqueSj Bonaire, Curasao, Aruba). 



