4. TKTllORTIYNCUUS. 



347 



" La machoiro inforieiire est assez haute en arritTC, fortcment 

 bombee sur le cote, etroite en avant. La peau des gcncives est noire, 

 toute la surface est couvertc de petites losangcs en saillie, (jui la 

 rendent raboteiise. Les dents sont en forme de iiiseaux ; ehaque 

 dent a six centimetres et dcmi de longueur sur deux centimetres et 

 demi de largeur ou d'cpaisseur, mais toute la dent est, pour ainsi 

 dire, racine." — Vmi Beneden, I. c. 



Fis-. 09. 



'■'fir 



Skull and tooth of Petrorhynchus Indicus, from Van Ijeneden. 



Misled by M. Yan Benedcn's description and figure, whicli are 

 here reproduced, in mj' paper in the ' Proceedings of the Zoological 

 Societ)-,' 18(;5, p. 522, I Avas induced to form ZijJtius Indicus into a 

 genus distinct from the Mediterranean and the Cape Whales. Since 

 that paper Mas prepared M. Van Beneden has visited England and 

 seen the Cape skuU, and considers it the same as or very nearly allied 

 to the one he described, and on his return he most kindly sent to 

 the British Museum and the College of Surgeons a cast of the beak 

 and the front end of the lower jaw of his specimen ; and there can be 

 no doubt that they are very ne;irly allied, if not specimens of dif- 

 ferent ages of the same species. For the present it is as -well to keep 

 them separate, pointing out the distinction between them. In Zijihiia 

 Indicus the very largely developed vomer gradually tapers off beliiiid 

 towards the blowers ; in the F. i'tqx'nsis it continues nearly of the 

 same thickness to the hinder end, and is there suddenly and i)er- 

 pendicularly truncated. It is only necessary to compare the two 

 tigui'cs to explain how I came to consider them distinct forms. 



