1891.] mr. o. thomas on ungulates. 385 



1. The Chevrotains. 



The species of Tragulus appear to be rather less in number than 

 was admitted by Prof. Milne-Edwards in his monograph of the 

 group \ as T. kanchil does not seem to be separable from T.javanicus. 

 The authors' names also used by Prof. Milne-Edwards want some 

 revision, as in two out of the four species the first mention of the 

 animal was unaccompanied by a Latin binomial name. The following 

 synopsis shows briefly the characters, ranges, and proper names of 

 the four species which deserve recognition : — 



A. Body not spotted with white. Skin between rami 



of lower jaw naked, glandular. Malayan. "^ 



a. Dark smoky-grey, belly greyish white without 



rufous or fulvous edging. 

 a^. Size large, hind foot with hoofs 140-150 millim. 

 Hab. S.Tenasserim, Malay Peninsula, Sumatra, 



and Borneo 1. T. napjt, F. Ouv.^ 



b. Rufous, at least on sides and along edges of belly. 

 b^. Bright rufous above ; back of neck not darker 



than the rest of the upper surface. Size 

 medium ; hind foot about 130 millim. 



Hab. " SirndsL Islands " (Milne-Edwards) 2. T, Stanley anus, Gv, 



c^. Greyish above, brightening to rufous on sides. 



A darker line, sometimes nearly black, along 



nape of neck. Size small; hind foot 110- 



125 millim. 



Hab. Camboja, Cochin China, S. Tenasserim, 



Malay ]:'eninsula, Sumatra, Borneo, and 



Java 3. T. Javanicus, Gmel. 



B. Body spotted with white. Chin and throat all 

 equally hairy. 



c. Size medium ; hind foot about 130-135 millim. 



Hab. India and Ceylon 4. T. meminna, Erxl. 



The West-African Chevrotain, " Hyomoschus^^ aquaticiis, Og., is, 

 as stated by Pomel, Riitimeyer, and others^, certainly congeneric with 

 the fossil Dorcatherium naui, Kaup, described in 1 836, nine years 

 before Gray formed the genus Hyomoschus. The animal will there- 

 fore have to stand as Dorcatherium aquaticum. 



2. Llamas and Alpaca. 



It is clear that the generic name of this group must be Lama 

 and not Auchenia, as Cuvier, the founder of the former name, had 

 no more power to withdraw it than any other author. The earlier 

 references to the two names are as follows : — 



Lama, G. Cuv. Anat. Comp. i. Tabl. gen. 1800 ; Desm. N. 



Diet. d'H. N. (1) xxiv. Tabl. p. 31, 1804; G. Fisch. 



Zoognosia, iii. p. 3.il (1814). 

 Lacma, Tiedern. Zool. i. p. 420 (1808). 

 Auchenia, 111. Prod. S. N. p. 103 (1811); G. Cuv. R. A. i. 



p. 25(1817). 



Many suggestions have been made as to the true relationship that 



' Ann. Sci. Nat. (5) ii. p. 49 (1864). 



■-' The references to these names are all given in Prof. Milne-Edwardd's jDaper. 



' For references, see Lydekker. Cat. Fuss. Mamm. B. M. ii. p. 153 (1885). 



