16. SOIALIA. 33 



3. Sotalia ga.damu. 



Delphinus (Steno) gadamu, Owen, Tr. Z. 8. vi. p. 17, pi. iii. figa. 1 & 2, 

 pi. IV. figs, 1-5. 



The three specimens placed provisionally under this name, though 

 otherwise much alike, exhibit a gradual transition in the characters 

 of the pterygoid bones, which in the la^t closely resemble those of 

 the ordinary Dolphins (Delphinus and Prodelphinus), not showing 

 that separation in the middle line characteristic of the weU-marked 

 members of the genus Sotalia. It becomes a question to be resolved 

 by the acquisition of further, materials, whether this may be a 

 change due to age, or whether it is of specific importance. 



a. Skull ; mutilated behind. (1477 a— 66. 2. 5. 3.) 



Vizagapatam. Sir Walter Elliot, K.C.S.I. [P.]. 



Type of species. 



h. Stuffed specijaen ; and skull taken from it. (82. 1. 2. 3.) 



Karachi. Karachi Museum, 1882 [E.] 



c. Stuffed specimen ; young ; and skull taken from the same. 



(83. 11. 20. 3.) 

 Secretary of State for India [P.]. 

 Exhibited in the Indian Section, International Fisheries Exhi- 

 bition, London, 1883. 



4. Sotalia lentigiuosa. 



Delphinus (Steno?) lentiginosus, Owen, Tr. Z. 8. vi. p. 20, pi. v. 

 figs. 2 & 8. 



a. Skull. (1476 a— 66. 2. 5. 2.) 



Vizagapatam. Sir Walter Elliot, K.C.S.I. [P.]. 



Type of species. It differs very little from the last. 



