50 JVUliNAL, NATURAL HIST. SOCIETY OF SIAM. Vol. I. 



Ear 27 X 21 ; tliird finger, metacarpal 51, first phalanx 25 ; lower 

 leg and hind foot ( c. u. ) 51. 



Skull : greatest length to front of canine 29 ; basi-sinual length 

 187 ; zygomatic breadth 16 ; interorbital breadth OG ; mastoid breadth 

 14; front of canine to back of w' 11.2 ; three upper molars together 

 6-4 ; three lower molars 10-6. 



Hab. N. Siam. T^'pe from the Chiengdao Cave, 50 miles north of 

 Chiengmai. Alt. 350 m. 



Ty;pe. Adult male (skin in spirit). B.M. no. 13. 4. 18. 3. 

 Collected January 1913. Presented by Th. H. Lyle, Esq.. H.B.M. 

 Consul at Chiengmai. 



The Sze-chwan Hippos ideros lyratti being as yet only known 

 from the type specimen, a female, and the present example being a 

 male, it at first sight seemed possible that we had here the ui>known 

 male of that species. But further examination shows such differences 

 as to render this impossible, notably the smaller general size, the much 

 mailer teeth ( this in a male as compared with a female ), and the 

 development of the pendant lappets at the front edge of the horseshoe, 

 not at all likel}^ to be a sexual character. 



The type-specimen was obtained in a cave in company with 

 examples of H. armiger, as also happened curiously enough with the 

 type of H. pratti. 



This adds another to the many new Siamese mammals discover- 

 ed by Mr. Lyle, and I have had great pleasure in connecting his name 

 with it. 



(The above was published by permission of the Trustees of the 

 British Museum, in the Annals aM) MAGAZl^71^ of Natural Histoky, 

 Ser. 8, vol. XIL, July 1913.) 



