Fig. 108.— American Jurassic Mammals— Plagiaulacid/e ; Wyoming Tereitokt, 

 North America. 

 a. E-ght upper jaw of Ctenacodon potent (Marsh), inner view. b. Palatal aspect of upper jaw of 

 C.potens (Marsh), c. Ctenacodon potent (Marsh), front view. d. An incisor tooth, e. Eight 

 ramus of lower jaw of Ctenacodon eerratus (Marsh), outer view. i. Left ramus of lower jaw of 

 Ctenacodon gerratus (Marsh), inner view. g. Outer aspect right premaxillary of AUodon fortis 

 (Marsh) and h. Inner view of same. i. Portion of upper jaw of A. fortis (Marsh). J. Left 

 upper jaw of A. laticeps (Marsh), nalatal aspect of cheek-teeth, k. Palatal aspect of left 

 upper jaw of A. ford? (Mareh). l. An incisor tooth {Ctenacodon). m. Left upper jaw of 

 A. laticeps (Marsh), n. Lower incisor of A fort is (Marsh). 



(For explanation of italic letters to figures, see p. 87.) 



