Loomis — Camels of the Harrison Beds. 



69 



considerable, I7 mm . The premolar series is simple, there being 

 no crescent on any of the teeth, and premolars 2-4 measuring 

 23 mm . The three molars are those typical of the genus, but 

 rather high crowned, and together extending 45 mm . The jaw 

 is very slender and with a short coronoid process. It measures 

 but 12-| mm in depth under the first premolar, and 17 mm under 

 the second molar. 



Fig. 3. 



Fig. 3. Lower jaw used as type of Protomeryx leonardi. Nat. size. 



The following table is arranged to show the relative size of 

 the different species of Oxydactylus, and especially to show 

 the variations in the proportions of the snout and in the posi- 

 tions of the canine aud first premolar teeth : 









Diastema 

 i 3 - c 



Diastema 

 c — p 1 



C8 



2 1 



CO 1 



£ a 

 l D i 



C3 



1,1 



03 



STph 



CO 1 



a lp * 



■3 s 

 to 1 7 

 a 



i-l 1 p« 



0. longipes. 



U. Harrison 



340 



13 



14 



18 



102 



17 



17 



104 



0. brachyodontus 



U. Harrison 



... 



14* 



18* 



19* 



93 



17* 



22* 



100 



0. lulli 



U. Harrison 



275 



12 



19 



19 



85 



15 



20 



91 



0. gibbi 



U. Harrison 



... 



10 



16 



18 



?2f 



12 



24 



77f 



0. campestris 



L. Harrison 



290 









70 









The genus Stenomylus contains the other Harrison camels 

 and is distinguished by having a complete dentition of very 

 hypsodont teeth, by the upper canines being partly and the 

 lower wholly incisiform, and by the slender build. Three 



* These measurements are taken from the figure. 



f The last molar being absent, it is estimated as being normal to the genus. 



