MAMMALS FROM SIAM. 



65 



The skull is remarkable for the antero -posterior length of the 

 bullae, which in this dimension are larger than those of full- 

 grown animals from Peninsular Siam and about twice the length 

 of those of Sus jubattolus, a small race occurring on Terutau 

 Island, off the west coast of that region and occupying a position 

 with regard to it very similar to that of Koh Chang in respect of 

 S.E. Siam. It is possible therefore that, when better material is 

 available, this pig may prove to be a representative of a local race. 



Though Blyth, in 1875 (Cat. Mamm. & Birds of Burma, p. 43), 

 drew attention to differences in the Tenasserim animals, the 

 common wild pigs throughout Eastern Asia were all regarded 

 as typical cristatus until Miller separated the Peninsular Siamese 

 and Tenasserim animal under the name of S'.juhatus (Proc. U.S. 

 Nat. Mus. XXX. p. 745, 1906), and it is this, or some allied form, 

 that occurs in Southern Indo-China. 



Head and body, 1110 mm. ; tail, 190 ; height at shoulder, 610. 

 Skull : greatest median length. 265 ; greatest breadth, 116 ; 

 antero-posterior length of bullae, 26. 



46. Orcella brevirostris (Owen). (Text-fig. 2.) 



Orcella brevirostris de Pousargues, Mission Pavie, Indo-Chine, 

 Etudes Diverses, iii. p. 546 (1904). 



Text-fio'ure 2. 



Photograph of Porpoise (Orcella brevirostris) at Klong Yiii, S.E. Siam. 



A male example of this cetacean was brought to me by fisher-- 

 men at Klong Yai on 6th December, 1914, but my preservatives 

 being then neaidy exhausted I only kept the skidl. 



Except that it had the profile of the head considerably less 

 Proc. Zool. Soc. — 1916, Ko. Y. 5 



