74 tTNGTTLATA. 



by the present writer, op. cit. vol. iii. pi. xvii. fig. 4 (as M. 

 perimensis). 

 Presented by Diwdn Wajeshankar Oowreeshankar, 1885. 



M. 3435. The first two ridges of the unworn second right lower 

 true molar ; from Perim Island. 



Presented by Col. J. W. Watson, 1886. 



Mastodon latidens, Clift 1 . 



This species forms the connecting-link between M. cauileyi and 

 Ehpfias clifti, and unites the two so closely that it is frequently 

 a matter of extreme difficulty to refer individual teeth to their re- 

 spective species. The mandibular syinphysis is not certainly known, 

 but it was probably short and tuskless. The upper molars are 

 very wide, with no cingulum and relatively low transverse ridges, 

 the median longitudinal cleft being frequently indistinct, the acces- 

 sory tubercles small and the valleys comparatively open, the trefoils 

 on the worn ridges imperfect, and the worn dentine surfaces on the 

 inner and outer columns soon uniting. The hind talons are very 

 large, while the inner border of the crown is concave and without 

 a distinct cingulum ; a fifth ridge is sometimes present in m. 2 2 ; 

 and the hind talon of m. 3 is always large, and may sometimes be 

 reckoned as a sixth ridge. The enamel is very thick, and in the 

 hinder teeth quite smooth ; cement is usually absent, and premolars 

 were probably developed. Those molars in which the ridges are 

 relatively taller and the accessory columns more developed pass im- 

 perceptibly into M. catitleyi, while those in which these features are 

 less developed and the median cleft more indistinct lead insensibly 

 on to Elephas clifti. 



Ifn/>. India (Perim Island, Sind, Punjab, and Siwalik Hills), 

 Burma, and Borneo a . 



M. 3424. Cast of a third left upper milk-molar provisionally referred 

 to this species ; from the Pliocene Siwaliks of the Punjab. 

 The original is preserved in the Indian Museum, Calcutta 

 (No. A 65), and is figured by the present writer in the 

 ' Palaeontologia Indica,' ser. 10, vol. i. pi. xxxvii. fig. 4, 

 where it is referred to the right side. 



Made in the Museum, 1886. 



7392. Cast of a little-worn right upper tooth, which is probably 

 mm. 4 or m. 1. The original was obtained by Crawfurd in 



1 Trans. Geol. Soc. ser. 2, vol. ii. pt. 3, p. 371 (1828). 

 - Palwontologia Indica, aer. 10, vol. i. pi. xxxviii. fig. 1. 

 3 Lydekker, Proc. Zool. Soc. 1885, p. 777, pi. xlviii. 



