538 A. LEITH ADAMS ON REMAINS OF THE 



The following remains belonging to Professor O'Beilly's collection 

 I have been enabled to identify. 



ELEPHAS PMMIGENITTS. 



1. A portion of a mandible containing the sockets of two molars 

 on either side. The descending ramus and coronoid process, with 

 the diasteme and portions of the alveoli, are deficient. The jaw is 

 evidently that of a young elephant, and probably belonged to the 

 owner of the following molars. ■ It has the round oval chin of the 

 Mammoth. 



There are a few laminations of tusks, but of no use for descriptive 

 purposes. 



2. A right upper first true molar, about half-worn. It is entire 

 excepting the loss of the tips of the fangs. There is a broad pres- 

 sure-mark, or hollow, of the advancing tooth behind. The crown 

 holds 12 plates and 2 talons in a length of 5 inches. The maximum 

 breadth of crown is 2-3 inches. 



The enamel of the plates is thicker than usually observed in 

 Arctic specimens, and in that respect is more like mammoths' teeth 

 from the brick-earth of the Thames valley. There is, moreover, a 

 greater roughening of the outer surface of the enamel, which on the 

 worn disk produces a faint crimping not generally observed in 

 northern specimens ; otherwise the tooth is un distinguishable from 

 the same molar of the mammoth. 



3. Two fragments of germ molars : — 



a. A fragment of an upper tooth, holding 8-9 posterior ridges, 

 including a broad, flat, digitated talon. The plates are of precisely 

 the same character as in the preceding tooth, but longer and 

 broader. 



b. Three plates and posterior talon of a similar tooth to a, and 

 most probably the fellow of the opposite maxilla. These two frag- 

 ments are probably portions of the second or successional molars 

 of the same individual as the owner of the first true molar and the 

 above mandible. 



4. a. A left os innominatum of a young elephant, the unions of the 

 three elements being unankylosed. There is a loss of only a portion of 

 the posterior aspect of the ilium and distal extremities of the ischium 

 and pubis. The contour of the thyroid foramen is nearly entire, show- 

 ing the narrow upper portion which characterizes this opening in the 

 Mammoth and Asiatic elephant as compared with that of E. africanus. 

 The obturator notch is also broader than in the latter. The bone 

 has altogether the character of the same part of the Mammoth. 

 The acetabulum is 16 centimetres in diameter by 8 centimetres in 

 depth. 



b. Fragment of the ischium, right side, probably of the same indi- 

 vidual as the owner of a. 



5. a. Portion of a left femur two feet in length extending from be- 

 hind the great trochanter to the condyles. The bone has the slen- 

 der character of the thigh-bone of the Mammoth, agreeing, moreover, 



