54:2 Mr. C. Forster-Cooper 07i a 



LV. — MaciotUeriuni salimim, sp. n., a new Chali'cothere 

 from India. By C. Forster-Cooper, M.A., Superin- 

 tendent of the University Museum o£ Zoology, Canibiidge. 



Among some fragmentary specimetis from tlie salt-range of 

 India, said to have been found near Chenji, and therefore 

 Sarmatian in age, is a left upper inohir of a Cluilicotliere, 

 whicli is different in certain particuUir.s from other species of 

 tlie family hitherto described from India. 



This tooth is in good condition, only just touched by wear, 

 and, as there is no sign of any jiressure-mark on the hind 

 border, is presumably a third inolar. It is approximately 

 square in outline, measuring 38 mm. along the outside border 

 and 39 mm. along a line from the cingulum of the protocone 

 to the outside edge of the parastyle. 



The forms so far described from India are :— 



PhylloLiUon naricus (Pilgrim *). 

 Schizotherium pilgrimi (Forster-Cooper f). 

 Chalicotherium (Circotherium) sivalense (Falconer & 

 CautleyJ). 



The first two species are from tlie earlier deposits of the 

 Bugti beds, and from the first-mentioned the present specimen 

 can at once be distinguished by its being square instead of 

 oblong in shape, from the second by its much larger size, and 

 from C. sivalense by the absence in the latter of a proto- 

 conulej a feature to which attention has not hitherto been 

 drawn. 



The present specimen, for which the name Macrotherium^ 

 salinum is proposed, has the following characters : — The 

 crown surface (tig. 1) shows a well-marked protocone, from 

 which a sharply defined ridge runs in a wide curve to the 

 protoconule. The latter cusp is rather more sharply defined 

 from the paracone than is usually the case. The cingulum 

 is broad in front and runs round tlie protocone, and ends in 

 the valley between tiie protocone and hypocone. It is not 

 interrupted by the protocone as it is in C. sinense and, to 

 some extent, in P. naricus. 



* Pilgrim, Mem. Geol. Surv. India, n. s., vol. iv. p. 34, and Forster- 

 Cooper, P. Z. S. 1920, p. 357. 



t Loc. cit. p. 362. 



I Trans. Geol. Soc. 1837, and Falconer's Memoirs, vol. i. pi. xvii. 



§ The attribution to this particular genus is tentative only, and is 

 based upon the subequal shape of the tooth (comp. Holland and Peterson, 

 Mem. Carnegie Museum, vol. iii. p. 210). 



