80 CETACEA. 



47037. Three vertebral centra. Purchased, 1875. 



47038. The imperfect right humcrus and four specimens of the 



radius and ulna. Purchased, 1875. 



Genus ORC A, Gray i. 



Teeth usually |J2 ta)' occu Pyi n o nearly the whole length of the 

 rostrum, and very large and stout, with conical recurved crowns 

 and largo roots, expanded laterally and flattened. The centra of 

 the first, second, and occasionally the third cervical vertebrae are 

 united, while the rest are free. 



Orca citoniensis, Capellini 2 . 



This species is of considerably smaller size than 0. gladiator, and 

 has thirteen teeth in each jaw; it was originally described from the 

 Pliocene of Cctona, Italy. 



Hab. Europe (Italy and (?) England). 



M. 3516. The cast of an unworn tooth, provisionally referred to this 

 species. The original, which is from the Red Crag of 

 Suffolk, and is preserved in the Ipswich Museum, is de- 

 scribed and figured by the writer in the ' Quart. Journ. 

 Geol. Soc.' vol. xliii. p. 15, pi. ii. fig. 10. The specimen 

 agrees exactly with the teeth figured by Capellini, op. cit. 

 pis. i A., ii. ; it also closely resembles the teeth of Pseudorca, 

 but is distinguished by its more compressed root. 



Made in the Museum, 1886. 



M. 3515. Cast of a right pcriotic, belonging to the same species as 

 the preceding specimen. The original was obtained from 

 the lied Crag of Woodbridge, Suffolk, and is preserved in 

 the Museum of Practical Geology, Jermyn Street ; it is 

 described and figured by the writer, op. cit. pi. ii. fig. 9. 

 It exhibits the grooved anterior tympanic articular facette 

 characteristic of the present family (as distinguished from 

 the Physeteridce~), and agrees very closely in characters 

 with the tympanic of 0. gladiator (Mus. E. Coll. Surg. 

 no. 2982), although of considerably smaller dimensions, its 

 length being 0,063. In the latter respect it agrees with 

 the tooth already noticed. Made in the Museum, 1886. 



1 Zool. ' Erebus ' and ' Terror,' p. 33 (1846). 



a Mem. Ac. Sci. 1st. Bologna, ser. 4, vol. iv. p. 670 (1883). 



