83 



must be extended northwards in Rupert's Land to the fifty-second 

 parallel of latitude, while the provisional geographical designa- 

 tion of Elephas Rupertianus must be expunged. 



The depression in question was most likely designed to afford 

 a firmer attachment to the central fasciculi of the infraspinatus 

 muscle ; and a similar one, though not so sharply defined, exists 

 in the scapula of an Indian fossil elephant from the Seewalik 

 hills, deposited by Dr. Falconer in the British Museum and Has- 

 lar Hospital, the parts in question being in them smooth and 

 convex. 



The error of my former notice above alluded to, arose from 

 an inspection of Mr. Koch's skeleton of the Mastodon now in 

 the British Museum, whose shoulder-bones exhibit no such de- 

 pression. Neither is this character visible in two other scapulae 

 purchased by the same institution from Mr. Koch as bones of the 

 Mastodon; all the four scapulae having merely some roughness, 

 but no hollow in that part of the infra-spinal surface. From this 

 fact, one might be led to conclude that the concavity in question 

 is merely an individual peculiarity, and does not occur generally 

 in the species ; but it is rare to meet a mere osteological variety 

 so perfectly alike in form in the two limbs as it is in our Swan 

 River scapulse, and, as we presume it to be, in both shoulder- 

 blades of Dr. Warren's Newburgh Mastodon ; for had it been 

 otherwise, that accurate observer would have mentioned it. And 

 the matter admits of another explanation. 



Mr. Koch's skeleton, when first brought from America for 

 exhibition in this country, had its parts not only misplaced, but 

 composed of the bones of more than one individual, there being 

 at least five vertebrae too many in the spine. It may therefore 

 be, that the two scapulse now forming part of the skeleton of the 

 British Museum Mastodon, and the two detached ones, are in 

 reality bones of the American fossil Elephant, of which a cra- 

 nium of great size was purchased by the Museum from Mr. Koch. 

 Dr. Warren has shown that the Mastodon giganteus and the great 

 fossil Elephant were coeval (op. cit, p. 142) ; and Mr. Koch may 

 have dug up the remains of both animals from the same deposit. 

 Not the least doubt rests on the authenticity of every part of Dr, 



