DECAPOD CRUSTACEANS OF THE WEST INDIES 53 



orly; short longitudinal carina protruding from gape and produced 

 anteriorly as divergent paired ridges. A large species when adult, 

 maximum postorbital carapace length about 55 mm; estuarine 

 specimens considerably smaller. 



Habitat. — Adults marine; juvenile and immature specimens in 

 brackish, exceptionally in fresh water. 



Distribution. — Cuba and Yucatan to Estado do Rio de Janeiro, 

 Brazil (Cuba, Jamaica, Hispaniola, Puerto Rico, Saint John, Saint 

 Croix, Antigua I., Saint Lucia I., Trinidad). 



2. Penaeus brasiliensis Latreille 



FiGXJBE 76 



Penaeus brasiliensis Latreille, 1817, p. 156 [type-locality: Brazil]. — Holthuis, 

 1959, p. 66, fig. 6c.— Boschi, 1963, p. 23, fig. 7. 



Diagnosis. — Lateral rostral grooves reaching nearly to posterior 

 margin of carapace, broad, each usually more than three-fourths as 

 wide as median ridge. Rostrum shorter than antennal scales, usually 

 with ventral teeth. Antennular flagella shorter than peduncle. Basis 

 of both first and second pereiopods armed with sharp spine. Fourth 

 and fifth pereiopods shorter than third. Petasma open with paired 

 hoodlike distomedian projections; stiff marginal strip unarmed, 

 distomedian tip projecting from surrounding tissue. Thelycum covered 

 by paired membranes produced laterally and tightly closed in midline, 

 with no anterior gape; anterior carina absent. A large species when 

 adult, maximum postorbital carapace length about 60 mm, estuarine 

 specimens considerably smaller. 



Habitat. — Adults marine; juvenile and immature specimens in 

 brackish, exceptionally in fresh water. 



Distribution. — Cape Hatteras, North Carolina, to Estado do Rio 

 Grande do Sul, Brazil (Bermudas, Cuba, Jamaica, Hispaniola, 

 Puerto Rico, Saint Thomas, Saint Croix). 



3. Penaeus duorarum notialis Perez Farfante 



Figures 5, 7c 



Penaeus brasiliensis. — Many authors prior to 1939 [part]. 

 Penaeus duorarum Burkenroad, 1939 [part], p. 31. — Boschi, 1963, p. 20, fig. 6. 

 Penaeus duorarum notialis P^rez Farfante, 1967, p. 94, fig. 4 [type-locality: off 

 Las Piedras, Gulf of Venezuela]. 



Diagnosis. — Lateral rostral grooves reaching nearly to posterior 

 margin of carapace, broad, each usually more than three-fourths as 

 wide as median ridge. Rostrum shorter than antennal scales, usually 

 with ventral teeth. Antennular flagella shorter than peduncle. 

 Basis of both first and second pereiopods armed with sharp spine. 

 Fourth and fifth pereiopods shorter than third. Petasma open with 



