MAMMAL SURVEY OF INDIA, BURMA AND CEYLON. 295 



Irrawaddy. The type locality of sladenl is Thizyain (? Tigyaing) on 

 the Irrawaddy, just below Katha, where Capt. Kemmis also took it. 



In this collection sladeni reappears unchanged on the East bank 

 of the Chindwin at Kindat, in exactly the same latitude. It has, 

 however, spread North and South along the River, forming local races 

 which, though intergrading, are at certain points fairly constant. 

 No less than six such are recorded in this Report. Besides these 

 Mr. Thomas has described two other forms, hartoni and midas, the one 

 from near Mansi on the JJju River, the other from Myitkyina on 

 the upper reaches of the Irrawaddy. Yet both these forms differ 

 very much less from true sladeni than any of the Chindwin forms. 



The type localit}^ of T. pygeri/thrus janetta is Mandalay, and the 

 Survey obtained it also at Mt. Popa. Thus the Lower Irrawaddy 

 would seem to be a barrier to its extension Westwards but ceases to 

 be so above the junction of the Chindwin. 



Batufa gigantea is an Assamese species and appears unchanged 

 «,t the extreme North of the Chindwin, at Hkamti, where it is found 

 on both banks. On the West bank it comes a short way South form- 

 ing a local race lutrina, but on the East bank it was not found 

 below Hkamti, although it is found but little if at all changed 

 through the Shan States to Siam and beyond. (See Introduction 

 to Mt. Popa Report.) Rahifa felLii belongs to the TnelaiKypefla 

 group (which includes 'plicBopeiola), of which we have received spe- 

 cimens from Mt. Popa and Tenasserim, and which we know extends 

 far South into Malaya. Here the T. iiygerythrus distribution seems 

 to be duplicated. We find no Battifa on the East bank beyond 

 Yin, and here B. fellii is closely related to fhceoijeiola marana, the 

 Burmese form of true Malay '^nelano'pe'pla. I do not pretend to 

 draw any conclusions but have only written of the matter in such 

 detail in the hope of interesting Members, and inducing them to 

 carry the enquiry further. Let us hope that we shall be able later 

 to obtain a collection "similar to this one" from the Upper Irra- 

 waddy, but in the meanwhile much might be done by local residents. 



Mr. Shortridge records his acknowledgment for assistance rend- 

 ered to him as follows : — 



" Not only on the Chindwin Expedition but throughout the 

 whole time we have been working in the Province, Mr. B. S. Carey, 

 C.S.I., C.I.E., the Commissioner of this Division, has been one of 

 the chief helpers and mainstays of the Survey in Burma. Capt. R. 

 W. Smart, Military Police, gave us a great deal of very much-needed 

 help on the Upper Chindwin, and on the Lower Chindwin Capt. L. 

 ■E. L. Burne, Deputy Commissioner, made every arrangement to 

 ensure our success in his District. 



Among others w^ho helped in many ways are Mr. R. Wooster and 

 every one we met belonging to the Irrawaddy Flotilla Company and 

 the Bombay Burma Trading Corporation. 



