THE 
GKEOLOGICAL MAGAZINE 
MENV. SERIES, | DECADE: Vic .VOLe. Ik 
No. L—JANUARY, 1916. 
ORIGINAL ARTICIES.-. 
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I.—Nore on a Mountep Sxeteton oF a ‘Gazeétir-CameL’, 
STENOMYLUS HITCHCOCK, Loomis. 
By C. W. ANDREWS, D.Sc., F.R.S., British Museum (Natural History). 
(PLATE I.) 
(Published by permission of the Trustees of the British Museum.) 
\HERE has recently been exhibited in the Gallery of Fossil 
Mammals at the Natural History Museum a restored skeleton of 
Stenomylus hitchcocki, Loomis, a ‘gazelle-camel’ from the Lower 
Miocene of Nebraska. ‘his specimen (M 10969), which has been 
mounted in relief by Mr. L. EH. Parsons, jun., includes portions of 
the skeletons of two individuals, but much of the dorsal region of the 
vertebral column and the ribs have been restored in plaster. The 
remains are from the Lower Harrison Beds (Lower Miocene) near 
Agate Springs, Co. Nebraska, where upwards of forty skeletons were 
edllected in a small area. Many were complete and lay in such 
a position that they are believed to be the remains of a herd overtaken 
by floods and drowned. 
Stenomylus was an extremely slender gazelle-like animal, differing 
widely from the usual conception of a camel. Its canines and first 
premolars are incisiform, the molars low-crowned. The neck and 
_ limbs are slender and much elongated, and the metapodials are not 
yet united to form cannon-bones. This type of camel seems to have 
been confined to the Lower Miocene of North America. 
The history of the sub-order Tylopoda (Camels) is a remarkable one. 
At the present day it is represented by one family only, the Camelide, 
and of this there are only two genera, one, Camelus, confined to 
Central Asia, the other, Auchenia, to the westernmost and southernmost 
parts of South America. When a group is thus represented by a few 
widely separated forms it may usually be assumed that it is the 
remnant of a formerly much more extensive assemblage which 
attained its maximum development in some region from which the 
few surviving forms have been derived. In the case of the Tylopoda 
this region was North America, where in the Tertiary period the 
group attained a great variety of form and where it survived in 
considerable numbers even to the Middle Pleistocene. During the 
Pliocene representatives had migrated into Asia and South America, 
and it is curious that although camels and llamas coexisted in North 
America no true camels reached South America and no llamas passed 
into Asia. This may perhaps have been because the camels, being 
DECADE VI.—VOL III.—NO. I. 1 
