2 



ternal border elevated, and the inner border notched medially. Incisor 

 compressed. 



Length of inferior molar series, .010 ; anteroposterior diameter of first 

 molar, .0024 ; length of fourth molar, .003 ; depth of ramus at diastema, 

 .0055 ; depth at third molar, .0095. 



This species is considerably larger than the S. relictus. It is dedicated 

 to Jacob L. Wortinan, of Eugene, Oregon, a successful explorer of the 

 paleontology of that State. 

 Paciculjjs insolitus, gen. et sp. no v. 



Char. gen. Superior molars three, rooted. Enamel forming three entrant 

 loops on the external face of the crown, aud one on the internal face. 



While the number of the superior molars of Paciculus is as in the Mu- 

 rid'm, the details of their structure is much as in Dasyprocta and Steneo- 

 fiber. But one species is known. 



Char. spec. Size small. Molars regularly and rapidly diminishing in 

 size posteriorly. Inner enamel loop turned forwards ; the external straight 

 and transverse, excepting in the first molar, where the anterior column of 

 the tooth is extended forwards, and the anterior loop is turned backwards. 



Length of superior molar series, .000 ; length of first molar, .0021 ; width 

 of first molar, .0018; length of third molar, .001. 

 Canis lemur, sp. nov. 



This species is represented by several crania in my possession. It is the 

 smallest of the genus yet discovered in the Miocene formation of Oregon. 

 It is characterized by the contracted proportions of the muzzle, the width 

 of the front, and the large size of the eyes. The postorbital process is only 

 a short angle. The superior border of the temporal fossa is traceable from 

 the postorbital process. Those of opposite sides embrace a smooth sagittal 

 area of an elongate urceolate form, and unite posteriorly in a very short 

 crest. The species is further characterized by the large size of the first su- 

 perior tubercular molar, which with the second, has a distinct inner cingu- 

 lar border, and median tubercle. The superior sectorial is short, and its 

 inner cusp is anterior. 



Some mandibles probably belonging to this species exhibit posterior cut- 

 ting lobes on the third and fourth premolars. The blades of the sectorial 

 are very short, and the heel large and wide. The tubercles of the tubercu- 

 lar are large. 



Length of cranium to front border of orbit, M. .0525 ; elevation of occi- 

 put, .058; length of superior sectorial, .007; length of first tubercular, 

 .0058 ; width of first tubercular, .0078 ; width of second tubercular, .005 ; 

 length of second tubercular, .0035 ; interorbital width of second specimen, 

 .0056; length of inferior dental series, .048; length of sectorial, .008 ; 

 length of heel of sectorial, .0035 ; length of inferior tubercular, .055 ; depth 

 of ramus at sectorial, .0105. 



This species is smaller than Canis gregarius, and differs from both it and 

 the C. cuspigerus in the larger orbits, more contracted muzzle, and in the 

 distinct superior border of the temporal fossa, etc. 



