270 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 46. 



In the t3^pe of Camelops Icansanus there is a space of 45 mm. between 

 the two teeth. It is to be noted further that the maxillo-premaxillary 

 suture in C. Icansanus crosses the alveolar border 20 mm. behind the 

 incisor. What may have been the form of the nasal border of the 

 prem axilla of C. Icansanus behind the part present in the type, we 

 do not know. As will be seen, that of C. huerfanensis is strongly 

 concave, differing thus from C. Jiesternus, the species of Camelus, and 

 the lama, m all of which this border is sinuous. Unfortunately, the 

 anterior end and the upper border of the left maxillary which came 

 into contact with the premaxilla is broken away. 



The type of C. huerfanensis differs from Merriam's specimens of 

 C. Jiesternus in having the posterior palatine foramina placed farther 

 backward; that is, opposite the first molar, instead of opposite the 

 third or fourth premolar. In the specimens described by Merriam 

 the mental foramina are said to be situated immediately below or 

 slightly behind the canine, as in the lama. In C. huerfanensis they 

 are placed but little in front of the hinder end of the symphysis and 

 probably well behind the canines. In the camel last mentioned the 

 coronoid process of the lower jaw is relatively wider than in the 

 C. hesternus, as shown by Merriam's figure 5. 



It is possible to describe some of the very fragmentary parts of 

 the skull of Cragin's type. A part of the occipital region (Plate 25, 

 fig. 1) is present, but it does not extend down to the foramen magnum. 

 There was a strong sagittal crest, but its summit has crumbled away. 

 The width of the occiput, measured along a line passing through the 

 lateral foramina, was close to 110 mm., the same as in the case of the 

 dromedary present. The lambdoidal crest is thin and sharp. On 

 the supraoccipital surface there is a median descending ridge, rough 

 and rounded, and separating two deep excavations. Exterior to 

 these there is on each side another deep excavation, at the bottom 

 of which is placed the lateral foramen. This region resembles that 

 in Merriam's specimens. The paroccipital process is longer, thicker, 

 and wider than in the Bactrian camel, and at its extremity presents 

 a hook. Its form is quite like that of the lama. A fragment of the 

 right maxUla has near its upper edge a depression which corresponds, 

 doubtless, to the fossa mentioned by Merriam. 



Figiu'es 2-4 of Plate 25, as already stated, give views of the left 

 premaxilla. The total length of the fragment is 126 mm.; the width 

 of the upper end is 26 mm.; at the narrowest part, 20 mm.; near the 

 anterior end, 31.5 mm. The thickness, a short distance below the 

 upper, or hinder end, is 7 mm.; just at the bottom of the socket for 

 the incisor, 17 mm. The incisor socket indicates that the tooth was 

 large, its height, close to the place of emergence of the tooth, being 

 22 mm. The socket was at least 40 mm. deep. The surface believed 



