MERRIAM: THE FAUNA OF RANCHO LA BREA. 227 



an uncommonly deep depression. The foramen ovale and the posterior opening 

 of the alisphenoid canal are also situated very near together, and are usually 

 in a distinct common depression. The situation of these foramina in this species 

 is approximated in some of the Recent wolf species, but the openings are not 

 often so nearly united in the Recent forms as to approach the extreme of 

 variation here. 



Measurements of Skull 



m co ^ r 



3 S - — 



.a a - — 



■3 S 3 a 



'g "3 'S £ 'a 



tS S n r. - 



O O ^ — ^- 



Length, anterior end of premaxillaries to posterior end 



of occipital condyles 282 mm. 267 250 223 



Length, anterior end of premaxillaries to anterior end 



of posterior nasal openings 155 141 131.5 119 



Width across nose, measured between outer sides of 



bases of canines 67.3 58.5 52 50.2 



Width, measured between outer sides superior sec- 

 torials 107.5 96.2 S5 89.5 



Width across zygomatic arches 175 ap 164.5 138.4 134 



Least diameter between superior borders of orbits 64.9 54.1 51 43.2 



Width between postorbital processes of frontals 93.9 77 67.7 64 



Length from a line drawn between posterior borders of 

 glenoid fossae to posterior end of occipital con- 

 dyles _... 54 57 52 52 



Length, anterior end of left ramus of mandible to 



middle of condyle 230 ap 210.5 202 17S 



Height of lower jaw measured between summit of cor- 



onoid process and inferior side of angle 91.3 87 85.7 82.5 



Height of lower jaw below hypoconid of M t 39.7 35.3 30.6 29.8 



Height of lower jaw below protoconid of P s 36.9 32.5 31.9 24.5 



Thickness of lower jaw below protoconid of M t 20.3 19.3 14.9 16 



(a) No. 10856. (c) No. 984, Univ. Calif. Mus. Vert.. Zool. 



(6) No. 10834. (d) No. 11257. 



ap approximate. 



Permanent Dentition 



Superior Dentition. — The incisors of the upper jaw (fig. 4) are not more 

 noticeably crowded in specimens 10828 and 10856 than in the modern Alaskan 

 wolves. 



I 1 is not materially different from that in the large modern wolves. On F 

 the basal lobe on the median side is small or wanting and there is a second 



