268 Annals of the Carnegie Museum. 



Through the publications by Dr. Loomis (/. c.) and Peterson* 

 this cameloid is now well known, and the abundance of its remains, 

 which have recently been collected in this quarry by Amherst, Yale, 

 the American, and the Carnegie Museums is quite out of the ordinary, 

 especially on account of their wonderfully perfect preser\-ation, the 

 hyoids and the cartilaginous ribs in many instances being present.^ 

 A survey of this plan results in further confirming Dr. Loomis' state- 

 ment of the possible origin of interment of this material, i. e., the herd 

 of animals meeting with a catastrophe up the stream, their carcasses 

 floated down and found lodgment in the backwater of some large cove 

 in which sands were accumulating behind a barrier of considerable ele- 

 vation. (See Plates XLII and XLIII.) The fact that the section 

 of packed sand in which the Stenomylus quarry is located is in the 

 neighborhood of 60 to 80 feet (about 22 to 32 meters) in depth, appears 

 to the writer to necessitate the idea of an uneven topography of the 

 locality in which the stream was located. Although it is nearly 

 always difficult to detect evidences of the former topography of an 

 extended area of sediment, it is known that in the Agate Spring Fossil 

 Quarries there are evidences of an uneven surface.* The Carnegie 

 Museum Quarries, Nos. I and 2, as well as the University of Nebraska 

 Quarry, are on one level with a slight dip to the north, while quarry 

 A of the Carnegie Museum some distance to the north from those first 

 mentioned, is considerably lower, but contains practically the same 

 fauna as the former. As stated by Dr. Loomis, and observed by re- 

 ferring to the accompanying field sketch, Stenomylus is almost exclu- 

 sively the only material so far found in this quarry. Hence the name. 

 These skeletons indicate that the carcasses perhaps floated down stream 

 some distance before they found a lodgment, which, in a measure adds 

 weight to the contention of Loomis that Stenomylus was perhaps an 

 upland form. 



The Mounted Skeleton. — (Plate XLIV.) As usual the conception 

 of the animal is most perfect when the skeleton is set up in full relief. 

 There have been a number of half-relief skeletons prepared in this 

 museum and one of them sent abroad. From these together with the 



'Ann. Car. Mus., Vol. IV, pp. 41-44, 1906; pp. 286-300, 1908. 



* Besides the fine material collected by Yale, Amherst, and the American 

 Museums, there were perhaps thirty or forty individuals collected by the Carnegie 

 Museum, of which 16 are practically complete. 



^Memoirs of the Carnegie Museum, Vol. IV, 1910, p. 205, Fig. i. 



