FREE INSTITUTE OF SCIENCE 



6l 



PROCAMELUS 



intermediate, the phalanges having a little more resemblance to those of the 

 camel than the corresponding bones of P. medius or miniums. The median 

 phalanges are not thin and flattened as in Camelits, but are stout, while the 

 terminal phalanges are also stouter than in the Camel. P. minimus is remark- 

 able for the length of the proximal phalanges, which in this respect exceed 

 those of the existing Auchenia llama, although the articular surfaces of the two 

 are of nearly the same size. Two phalanges from the forefoot of P. minimus, 

 one of which is shown in plate xvi. fig. 8, are a little more than one-fourth 

 longer than the corresponding bones of P. gracilis, shown in plate Ixxix. fig. 7 

 of Vol. IV., " Report of the U. S. Geographical Surveys West of the looth 

 Meridian," and there called Procameliis occidentalis. Compared with Holo- 

 meniscus hestermis and H. sitlcatus the proximal phalanges of P. major are 

 shorter and heavier. 



There are not sufficient specimens present to show whether or not there is 

 the same discrepancy in size between the phalanges of the fore and hind feet 

 that is found in existing camels and llamas. 



