Proceedings of the Wernerian Society, 191 



The Equus heniionus* (as implied in the specific name) is interme- 

 diate in its characters between the horse and the ass. In comparing 

 the wild with the domestic horse, Mr Jameson remarked, that the head 

 is much larger in proportion to the si2e of the animal ; the ears longer 

 and more erect ; neck finer and more slender ; legs more slender ; 

 tail asinine ; hoofs also asinine, and subcylindrical ; mane short, and 

 of a deep brown colour, approaching to liver brown ; mouth rather 

 small, and nostrils situate close to the muzzle ; a dorsal line, of a deep 

 chestnut-brown, extending from the bottofn of the mane to two-thirds 

 along the tail, the latter third being composed of a tiift of black hair. 

 The general colour of the animal is characteristic : muzzle white ; 

 head, face, and external portion of earS, chestnut-brown ; the body, 

 and the external parts of the shoulders and horns, are of a wood 

 brown colour ; while the fore parts of the neck, belly, and legs are 

 white ; and the line where those two colours meet is well-defined, 

 the colours nowhere blending into each other. Mr Jameson further 

 mentioned that the specimen stands exactly 13 hands high ; and that 

 the other most important measurements were — length of head, 2 feet ; 

 neck, 2 feet 5 inches ; back, from shoulder to rump, 4 feet S inches ; 

 tail, 1 foot 6 inches ; legs, 4 feet 8 inches ; circumference of neck, 

 1 foot 10 inches ; girth of body, 5 feet ; from flank to flank, 2 feet 

 6 inches ; length of ears, 8 inches. The dental system was Unfor- 

 tunately imperfect in the specimen. 



The Tartarian Marmot was found to be entirely new to natural 

 history, and greatly superior in size to all its congeners, several 

 American species being placed on the table. Professor Jameson 

 has named it Arctomys tataricus, and the following is the descrip- 

 tion : — Length from nose to tip of tail, 2 feet 10 inches ; length of 

 tail, 6i inches ; girth between scapulae or round anterior flanks, 

 1 foot 1 inch ; girth round posterior flanks, 1 foot 5 inches ; length 

 from flank to flank, 11 inches ; extremities, 8 inches ; girth round 

 throat, 11 inches ; height at shoulder, 9 inches : — head and eyes 

 rather large ; ears rudimentary ; nostrils black, and naked at the 

 part which separates them ; upper lip distinctly bilobated, leaving 

 the incisors uncovered ; moustaches on both sides of muzzle, and 

 above and below the eye : — teeth, 2 incisors in the upper, and 2 



* Female specimen. 



