136 CETACEA. 



The following is the measurement of D'Orbigny's specimen : 



met. cent. 



Length, entire 1 4 



of muzzle 23 



to eye 34 



to blower 40 



to ears 43 



to pectoral fin 52 



to dorsal fin 1 30 



of pectoral 42 



Breadth of pectoral 018 



of caudal 50 



Height of dorsal 9 



Circumference of thickest part ... 1 4 



The specimen in the Paris Museum, which Desmarest described 

 as Delphinus Geojfroyii, is evidently this species. It was taken 

 from the Lisbon Museum, and is covered with paint. It has no 

 dorsal, and it shows the teeth sufficiently to exhibit their rugose 

 state, and the large and peculiar tubercle on the inner side of the 

 hinder ones, which is characteristic of this genus, and which ap- 

 pear to have been overlooked by M. Desmarest, who describes 

 them as " coniques, obtuses, avec une sorte de collet inferieure- 

 ment, et entre leur surface est rugueuse." 



This painted Lisbon specimen, according to M. F. Cuvier, was 

 the type on which Cuvier described his Delphinus frontatus (Ce- 

 tac. 122). 



The skull in the Paris Museum, from M. D'Orbigny, has a 

 prominent tubercle behind the blow-holes : eyebrows convex and 

 rugose on the top ; beak with a slight groove on each side above ; 

 lower jaw with scarcely any ridge on the sides ; the symphysis 

 long, occupying more than half the length of the lower jaw ; teeth 

 large, regular, hinder ones with a rounded, regular tubercle on 

 the inner side. 



Length of skull 19 



of beak 12 



of symphysis . . 9 



of teeth-line . . 11 



The Delphinus macrogenius (Fischer, Cuvier, Oss. Foss.v.312. 

 t. 23. f. 4, 5. f. 9-11) appears to belong to this tribe. 



e. SJcutt with the maxillary bones bent up in front of the blower 

 and forming a vault. Teeth compressed. Paddles or pec- 

 toral fins fan-shaped, truncated at the end. Platanistina. 



Platanistina, Gray, Zool. E. fy T. 45, 1846. 



