622 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



Measurements of type. 



[Dimensions in millimeter's.] 



Anteroposterior. Transverse. 



Diameters of p' 2. .5 2.1 



Diameters of if 2.5 2.5' 



Diameters of p^ . 3 2 



Diameters of p'' 5 2.5 



Diameters of m^ 4.6 2.1 



Diameters of m^ 2 2.3 



Total length of upper dental series 25 



Length of molar-iiremolar series 19.5 



Anteroposterior. 



Diameters of lower ih 7.0 



Diameters of lower m, 3.3 



Diameters of lower nb 2.4 



Total length of lower serie.s, including incisor 20. S 



Length of molar-jn-emolar series 12.2 



Length of lower .law 2G 



Length of lower jaw. including incisor 31 



I>ei)th of lower jaw at nh 6. 8 



Depth of lower jaw at p, 5.5 



Total length ')f skull 41 



Greatest width of skull (across glenoid fossse) .31.6 



Width of sknll at p^ ir». ,5 



Width of palate hetwt'en first premolars 8 



Width of palate belween last molars '_ 8 



W^idth of palate between fourth premolars 11 



Distance from occipital condyle to posterior border of palate 15 



Transverse diameter of occipital condyles 9.2 



Distance from center of glenoid fossa to m^ : 11 



Distance from condyle of lower jaw to m^ 11 



Ijength of humerus (estimated) ; 24 



liength of distal portion preserved 16 



Greatest diameter of head of humerus 4.9 



Transverse diameter of shaft 2. 6 



Width across condyles 5.(5 



Width across articular surface (anterior) 3.4 



Width across articular surface (posterior) 2.6 



Anteroposterior diameter of trochlea 3. 4 



Total length of pelvis (estimated) 37 



Length of ischium 12.5 



Diameter of acetabnUnn 3.8 



Length of femur 32+ 



Diameter of shaft 4 



PTILODUS SERRATUS?" (Marsh). 



A left lower fourth premolar (Cat. No. G088, U.S.N.M.), found 

 in the same deposits from which the types of P. montanus and P. 



° IlaJodon scrratus Marsh, Amer. Jouru. Sci., XXXVIII, 18S9, p. 87, pi. iii, 

 fig. 14. 



