140 TTNGTTLATA. 



formula of the milk-dentition is I. |, C. \ , Mm. | ; there being one 

 lanariform and three molariform milk-molars. This shows that the 

 missing upper premolar in the existing Camels is pm. 2, the two 

 missing lower teeth being respectively pmT2 and pm . 3. In the 

 lower true molars of both Siwalik species there is a vertical ridge at 

 the antero-external angle found in the genus Atichenia, but not in 

 modern Camels. The cervical vertebrae of the fossil species are 

 intermediate between those of Auchenia and the modern Camels. 



Camelus sivalensis, Falconer & Cautley 1 . 



This species is as large as the existing Camel. The enamel of 

 the teeth is rugose, and the inner surface of the lower true molars 

 nearly flat in the middle line, without any vertical ridge in an early 

 condition of wear. The mandible is long and slender. 



Hob. India. 



All the following specimens are from the Pliocene of the Siwalik 

 Hills, and, unless otherwise stated, belong to the Cautley Collection 

 (Presented, 1842). 



39597. The hinder part of the cranium, in a crushed condition, 

 (Fig.) showing m. 2 and m. 3 in an early stage of wear. This 

 specimen (which, with those mentioned below, is the type 

 of the species) is figured by Falconer and Cautley in the 

 * Fauna Antiqua Sivalensis,' pi. Ixxxvi. fig. 1. The molars 

 exhibit the characteristic rugosity of the enamel. 



Presented by Gen. Sir W. E. Baker, K.C.B., 1848. 



36664. The middle portion of the cranium, showing the four last 

 (Fig.) cheek-teeth in a middle stage of wear. Figured by 



Falconer and Cautley, loc. cit. pi. Ixxxvi. fig. 2. The 



enamel of the molars is rugose. 



Presented ly the Secretary of State for India, 1860. 



40566. Fragment of the left maxilla, containing m. 2 and m. 3, in 

 (Fig.) a well-worn condition. Figured by Falconer and Cautley, 

 loc. cit. pi. Ixxxvii. fig. 3. The enamel is rugose ; and 

 the length of the base of the crown of m. 3 0,047. 



40563. The left half of the middle portion of the cranium, showing 

 (Fig.) the three true molars in a well-worn condition. Figured 

 by Falconer and Cautley, loc. cit. pi. Ixxxvii. fig. 2. 



1 Asiatic Kesearches, voL xix. p. 120 (1836). 



