36 Journal of the F.M.S. Museums. [Vol. VII, 



quoted by Mr. Kloss but he has unfortunately omitted to note 

 that therein the specimen from Koh Si Chang has been 

 definitely selected as the type, as indeed had already been done 

 by Bonhote in 1900. The dimensions given by Wroughton 

 perfectly agree with those of the type of Sc. f. partus, Kloss, as 

 is shown by the figures here repeated, those in parentheses 

 being from the type of Sc. f. portus. Allowance must of course 

 be made for the fact that the body measurements of the type 

 of Sc. finlaysoni have presumably been taken on the dry skin. 



Head and body, 175 11971: tail, 175 (183); hindfoot, 43 

 (44) mm. Skull: greatest length, 46 (46.5); interorbital 

 breadth, 17.3 (16.7); zygomatic breadth, 28 (27.5); length of 

 nasals, 13 (12.6) mm. 



Under the rules governing nomenclature, as almost un- 

 iversally recognised by zoologists, the first reviser has the right 

 to designate the type of a species from the original material, if 

 such has not been done by the author of the species. 



Sciurus finlaysoni portus therefore becomes a pure synonym 

 of Caljosciurus finlaysoni finlaysoni 1 Raffles). 



The mainland animal being thus without a name I propose 

 to dedicate it to the original discoverer. 



Callosciurus finlaysoni tachakdi. subsp. now 



Diagnosis. Similar to the typical form from Koh Si 

 Chang but considerably larger, greatest length of skull 

 53-5 — 57-° mm - against 44.0 — 47.7 mm. in the typical form. 



Type. Male adult (skin and skull) in British Museum 

 from R. Mee Nan, Siam, altitude, 75 m. collected by Mr. T. 

 H. Lyle on April 4th, 1900 (spin. f. sub. Sciurus finlaysoni, 

 Bonhote, P.Z.S. (i) 1901, p. 53.) 



Co-types. Krabin, Bangpakong R., Central Siam, collect- 

 ed by native collector in November, 1915. Nos. CBK. 2020, 

 2037—8. 2046 — 8). (cf. Kloss, Journ. Nat. Hist. Soc. Siam, ii. 

 pp. 16, 30 (1916). 



