EXPLANATION OF PLATE XXIII. 



ODOCOILEUS SINALO^E Allen. 



Specimens (third year males), all collected at Escuinapa, Sinaloa, Mexico. 



Figures J nat. size. 



FIG. i. No. 24533, d\ 3d year; dentition, dpi- 3 , mi-*. Dorsal view: 

 nasals of medium length, very broad, truncate posteriorly, slightly notched 

 anteriorly. 



FIG. 2. No. 24559, cT, 3d year (dp*- 3 , m- 3 ). Dorsal view: nasals of 

 medium length, very narrow, emarginate posteriorly, moderately notched 

 anteriorly. 



FIG. 3. No. 24540, cT, 3d year (dp 1 - 3 , m 1 - 3 ), with canines. Dorsal view, 

 showing large, posteriorly convex nasals. 



FIG. 4. No. 24542, cT, 3d year. Dorsal view, showing very small nasals, 

 with double-convex posterior border, and deep frontal emargination. 



See also nasals and premaxillaries in Plates XXI, XXII, and XXXI. 



