MAMMALS FROM SIAM. 61 



up to modern requirements for subspecific purposes, and is at 

 best that of a young animal only. 



Measurements of the skull are as follows; those in parentheses 

 being of the Karen Hill animal referred to above : — Basal length, 

 1 19 (119) mm. ; greatest breadth, 75'5 (68) ; mesial nasal length, 

 71 (64); anterior nasal breadth, 27 (29); posterior nasal breadth, 

 36 "5 (40); length of naso-premaxillary suture, 43 (39); length of 

 frontal suture, 31 (29) ; bregma to back of occipital crest, 42 (34) ; 

 diastema^ 36 (38); upper molar series, 31 (27); distance between 

 outer corners of the two infraorbital foramina, 57 (53) ; height 

 of nasion from centre of palate, 51 (51). 



Thus the Siamese-Cambodian skull, while of the same length, 

 is broader than the other ; but the nasals are narrower through- 

 out^ though longer ; the tooth-row is longer, as is that portion of 

 the skull posterior to the bregma. 



Other measurements that may be recorded are : — Median dorsal 

 length' of skull, 139 mm.; median nasal length, 71; median 

 frontal length, 31 ; median parietal length, 18. Collector's 

 external measurements: — Head and body, 835; tail, 115; hind 

 foot, 93 ; eat, 45*5. 



Having regard to these difierences, together with geographical 

 derivation, S.E. Siam being more than a thousand miles distant 

 from the Sunderbunds, it seems possible that the eastern animal 

 may eventually prove distinct ; but until the mammal survey of 

 India, now much curtailed, has been actively resumed again, a.nd 

 topotypes of hengalensis are available, nothing can be done. For 

 the present, therefore, I content myself with the above i-emarks. 



Pousargues, in Mission Pavie, Indo-Chine, Etudes Diverses, iii. 

 p. 533 (1904), states that H. hengalensis does not extend east- 

 ward beyond Burma., but Gryldenstolpe (Arkiv for Zoologi, 

 Band 8, No. 23, p. 20) has since recorded, under this name, a 

 porcupine obtained by him in ISTorthei-n Siam which appears to 

 be intermediate in cranial dimensions between Fea's Tenasserim 

 specimen and the present animal. 



[At Mr. Kloss*s request I have examined this skull, and it is 

 referred to in my pnper on Acanthion Mossi, Ann. Mag. N. H. 

 (8) xvih p. 136, Jan. 1916.— 0. Thomas.] 



42. MUNTIACUS MUNTJAK) subsp. 



An immature male, with the posterior molars not fully up, 

 Avas obtained on Koh Chang Id. 



It is a very brightly coloured animal. Dorsal region and 

 upper side of tail fulvous-chestnut becoming ochraceous on the 

 under surface, limbs, base of ears, and sides of head. Forehead 

 and front of pedicels tawny, top of muzzle brown. On the nape 

 and the front of the lower limbs there is a scattering of blackish- 

 brown hairs, which are in excess near the hoofs, particularly on 

 the hind feet. A black line along the horn pedicels and the 



