1. SOTALIA. — S. TUCUXI. 155 



43.2'"'; length of rostrum, 25.3""; breadth of beak at base,0.3'"; breadth 

 of same at its middle, 5"'; breadth between orbits, 17.2""; length of 

 temporal fossa, 8.8'"- 



Habitat. — Indian Ocean. Vizagapatam {Owen)', Karachi; Australia 

 (Floiver). 



SOTALIA LENTIGINOSA (Owen). 

 (Plate 2, fig. 3.) 



General form as in S. gadamu, but with smaller pectoral and dorsal 

 fins, and broader flakes. Caudal ridges prominent. 



The color is pretty uniformly bluish cinereous, or slaty, freckled 

 with irregular small spots or streaks of brown or plumbeous pigment, the 

 streaks longitudinal and flecked with white ; the under surface is a 

 shade lighter than the rest of the body. (Owen.) 



Teeth f^. Skull narrower than in S. gadamu. Occipital condyles and 

 temporal fosste larger. Breadth of the rostrum at the middle one- 

 sixth its length. 



Measurements of the exterior. — 9 adult (Owen) : Total length, 94 inches 

 (239.7'^'") ; length of snout, 6 inches (15.3"") : length of mouth, 12 inches 

 (30.G'"'") ; tip of snout to base of pectoral fin, 24 inches (61.2'='») ; lengtli 

 of pectoral (along anterior curve), 12 inches (30.(j'='") ; tip of snout to 

 dorsal fin, 40 inches (102<"") ; breadth of flukes, 21 inches (53.0^^'"). 



Measurements of the slull. — (147Grt, British Museum. Tvpe) : Total 

 length, 47"" ; length of beak, 28.2"" ; breadth of beak at base, 10.2"" ; 

 at its middle, 4.7<='" ; breadth between orbits, 17.4'^'" ; length of temporal 

 fossa, 10.2"". 



Habitat. — Vizagapatam, India {Owen). 



SOTALIA GUIANENSIS (Vau Beueden). 



See Van Beneden, Mem. Couron. Acad. Ro}^ Belgique, coll. in 8°, 

 XVI, 1804, Art. 2. 

 Also page 17. 

 Habitat. — Cayenne, French Guiana. 



SOTALIA BRASILIENSIS Van Beneden. 

 (riate 3, figs. 1 and 2.) 



See page 17. 



Habitat. — Bay of Rio de Janeiro. 



SOTALIA TUCUXI (Gray). 

 (Plate 5, fi<r. 2.) 



See page 17. 



Habifaf. — Amazon River; mouth of Tocantins River {Bates);^ Flor- 

 ida ( U. S. National Museum). 



