258 A BOOK OF WHALES 



characters, and its external characters are unknown. 

 It is therefore not very satisfactory, but is retained in 

 deference to Mr. True's researches. It may be, 

 thinks Mr. True, identical with Gray's Delpkinus 

 capensis. It comes from Malabar. 



The third and last species, Delphinns roseiventris, 

 Wagner,^ is in length barely four feet. Form stout. 

 Forehead abruptly sloping. Beak long. Dorsal fin 

 broad. Teeth, 48.! 



The characteristic feature of this species, whence 

 it derives its name, is the rosy ventral surface, more 

 usual in fresh-water dolphins ; the back is black or 

 dark grey. It is a native of the Molucca seas and of 

 Torres Straits. Gray placed this species in the genus 

 Steno because it had not a grooved palate. But this 

 appears to be wrong. 



The genus PRODELPHINUS is carefully to be dis- 

 tinguished from Delphiims. It has a distinct beak ; 

 dorsal and pectoral fins falcate. Vertebrae : C. 7 ; 

 D. 14 (15); L. 22 (19, 21); Ca. 29-38-69-81. 

 Pterygoids in contact. Phalanges: I, 2. II, 9. Ill, 7. 

 IV, 3. V, i. 



Of this genus Mr. True remarks: "The chief 

 character which has been brought forward as 



* SCHREBER'S Saiigeth., PL ccclx., fig. i (fide TRUE). 

 t The description is derived not from Wagner, but from the Voyage 

 tie PAstrola.be, 



