58 



Zoological Society : — 



the corpus, of precisely the same form as that figured in Cuvier's 

 Oss. Foss. pi. 25. f. 14. 



Fig. 6. 



Fig- 7. 



Fig. 8. 



Fie. 9. 



" Of the pectoral fin we have only the scapula, of which I send 

 you a drawing (fig. 10); both processes are well developed and some- 

 what compressed. 



Fig. 10. 



Scapula. 



" The animal was found some leagues from Buenos Ayres, on the 

 banks of the River Plata, where it came ashore some thirty years 

 ago. It was brought to the gardens of Rosas, at Palermo, where the 

 skeleton was exhibited a long time, till, after the fall of the tyrant, 

 it was transferred to the Museum. The parts now deficient were 

 then lost. 



" I suppose that the species might be the same as that you have 

 indicated in your synopsis as Balcenoptera australis, Desmoulins 

 (Voy. Ereb. and Terror, Mamm. p. 20) ; but as I have never seen 



