CETACEA. 137 



17- PLATANISTA. 



Head convex, beak compressed, curved up at the end ; teeth 

 compressed ; dorsal none ; back keeled in the place of the fin, and 

 obliquely truncate behind ; pectoral fan-shaped, truncated. 



Platanista, Pliny; " Cuvier, 1829," Me Lesson, Tab.Reg.Anim* 

 198; Wagler, N. S. Amph. 35, 1830; Gray, Illust. Ind. Zool. 

 Platanistina, Gray, Zool. Ereb. Sf Terr, (misprint). 

 Susu, Lesson, GEuv. Buffon, i. 215, 1828; Tab. Reg. Anim. 198. 

 Delphinorhynchus, sp. Lesson. 

 Delphinus, sp. Lebeck. 



There is a head of a young specimen in the Anat. Mus. Univ. 

 Edin. Knox Cat. n. 105. The reflexed portion of the maxillary 

 bones only partially developed ; their inner sides are cellular and 

 radiately ridged with a ragged edge. 



As the animal increases in age, the ends of the jaws become 

 more turned up, and the teeth enlarge and become thicker at the 

 base. 



1. PLATANISTA GANGETICA. The Sou Sou. 

 Blackish lead-colour, rather paler beneath. 



Delphinus Gangeticus, Lebeck, N. Schrift. Berlin, Natur. iii. 



280. t. 2; Home, Phil. Trans. 1818, 417. t. 20; Roxburgh, 



Asiatic Researches, vii. 170. t. ; Desm. Mam. 513 ; Fischer, 



Syn. 506; Cuvier, Oss. Fos. v. t. 22. f. 8-10. 

 Delphinorhynchus gangeticus, Lesson, Man. 406. 

 Platanista gangetica, Gray, Illust. Ind. Zool. t. ; F. Cuv. 



Cetac. 252; Gray, Zool. E. fy T. 45; Cat. Mam. Brit. Mus. 

 Delphinus Shawensis, Blainv. in Desm. Diet. H. Nat. ix. 153, 



from spec, in Mus. Coll. Surg. 

 D. rostratus, Shaw, 514, from spec, in Mus. Coll. Surg. ; Home, 



Phil. Trans. 1820, t. 20. 

 Platanista, Lesson. 



Susu, (Euv. Buffon, i. 215. t. 3. f. 3, 1828. 

 Platanista, Plin. Hist. Nat. ix. ch. 15. 

 Dauphine du Gange, Cuvier, Oss. Foss. v. t. 22. f. 8, 10, from 



spec. Shaw. 

 Inhab. India, Ganges. 



a. Stuffed specimen. India, Ganges. 



b. Younger. India, Ganges. 



c. Skull : end of nose nearly straight, young. India, Ganges. 



d. end of nose recurved. India. Presented by Gibson 

 Rowe, Esq. 



