Peterson : Miocene Beds of Nebraska and Wyoming. 53 



Transverse diameter of P ¥ 6 



Antero-posterior diameter of P T 1 6 



Transverse diameter of P^ 8 



Antero-posterior diameter of M T 25 



Transverse diameter of M T 11 



Antero-posterior diameter of M 5 14 



Transverse diameter of M T 10 



Antero-posterior diameter of M-3 9 



Transverse diameter of M f 7 



Nothocyon (Galecynus) annectens sp. nov. 



(Type Specimen, No. 1602, Cam. Mus. Cat. Vert. Foss. ) 



This species is provisionally referred to the genus Nothocyon though 

 future discoveries of more and better material may necessitate sepa- 

 rating it from that genus. The type (No. 1602) consists of the 

 upper and lower jaws, the dentition being complete with the ex- 

 ception of the lower incisors. The specimen was found associated 

 with the type of Amphicyon superbus in the upper part of the lower 

 Harrison horizon near the Agate Spring Fossil Quarry, in Sioux 

 County, Nebraska. 



In size the type most nearly agrees with Nothocyon lemur from the 

 John Day beds of Oregon. Nothocyon latidens is somewhat larger 

 and the internal border of 1VP- has a greater antero-posterior diameter. 

 According to Cope (Tertiary Vertebrata, p. 930) there are no inter- 

 mediate tubercles on 1VP- in the latter species. Upon the whole, the 

 dentition of the present specimen is more specialized than that of the 

 forms from the John Day beds. 18 



The left side of the skull of the type has part of the orbit pre- 

 served ; it was apparently of large size. The anterior border of the 

 orbit is partly formed by the ascending process of the jugal. The 

 postero-external portion of the maxillary is much convex antero-pos- 

 teriorly, has a constricted area at P^ and a slight eminence over the 

 canine. The muzzle evidently had a pointed appearance like that 

 in N lemur. The superior incisors are about uniform in size ; the 

 lateral incisor has a heavy cingulum on the internal face which ex- 

 tends obliquely downward and disappears at the external angle near 

 the base. The canine is. long, rather slender, and considerably re- 

 's Dr. Matthew, who kindly compared the specimen, points out that it reveals a 

 combination of the characteristics of N. lemur and N. latidens. 



