PLIOCENE HARES FROM IDAHO — GAZIN 



119 



trant fold shows no differences, but the anterior external fold appears 

 a little shallower. Moreover, one of the isolated Ps and this tooth in 

 no. 1322 show a slight groove on the anterior face. No differences 

 were observed between the species in tlio lower molariforin teeth. 

 The species Ilypoloxjus limnetus and Ilypolagus furlongi are very 

 close and the differences separating them may be only of geographic 

 importance, but probably the deposits in which remains of the two 

 were found are of slightl}^ different age as indicated by the specific 

 differences observed between the otters'* and some of the ro- 

 dents." In these cases the Grand View stage appears somewhat 

 more advanced. 



ALILEPUS? VAGUS, new species 



Type. — The anterior portion of a right mandibular ramus includ- 

 ing P.,, U.S.N.M. no. 12622. 



Locality. — T. 7 S., II. 13 E., Plesippus quarry, near Hagerman, 

 Idaho. 



Horizon. — Hagerman lake beds. 



Specific characters. — Size near that of Ilypolagus 

 vetus, somewhat smaller than Alilepus oMnectens 

 (Schlosser). Portion of jaw between I and P3 

 relatively short and heavy. Outward deflection of 

 inferior margin of ramus, just anterior to lower end 

 of P3, somewliat sharper than in //. vetus. I and 

 Pg relatively large. P3 with posterior external 

 reentrant fold extending about halfway across 

 tootli and internal fold reaching slightly less than 

 halfway. Anterior external reentrant fold shallow 

 and rounded. 



Description. — The only specimen exhibiting the 

 peculiar character suggesting an alliance with 

 Schlosser's Lepus annectens ^^ from the latter Ter- 

 tiai-y of Mongolia is a single fragmentary ramus 

 (fig. 5) with the third premolar and the basal 

 portion of the incisor. The specimen corresponds very closely in size 

 with the large Ilypolagus jaws from Hagerman but shows several 

 features indicating it to be a distinct type. The jaw portion anterior 

 to P3 is short and moderately robust, accommodating a particularly 

 broad incisor. The mental foramen is of good size and is pla(;ed well 

 out on the external surface of the jaw. The inferior margin of the 



»Gazin, C. L., Journ. Mamm., vol. l.-j, no. 2, pp. l.*?7-149. 10:54. 



"WilHon, R. W., CarncKio LiHt. WaHliinRton Publ. 440. pp. 110-1:55. 19:5:5. 



" Schlosaer, Max, Pal. Sluica. ser. C, vol. 1, fasc. 1. pp. 45-48. Qks. 37-38. 1924. 



KICUHK V^.- -AUlc- 

 imal vaous, new 

 species : Frag- 

 ment of right 

 ramus of mandi- 

 ble, type speci- 

 men (U.S.N.M. 

 no. 12622) ; lat- 

 eral view X 1, 

 lOcclUHal view X 

 2. Hagerman 



lake beds, Upper 

 I.'lloccne, Idaho. 



