DESCRIPTIONS OF FOEMATIONS 471 



phylum are in the front teeth. I can not identify it with certainty 

 as belonging to any known genus or species. 

 Indicated age, Oligocene to Upper Miocene. 



"Mcrychippus sp., upper and lower teeth. 



A rather small and moderately progressive species; it might be 

 Upper or late Middle Miocene- 

 ''f Alticamclus, distal ends tibia and metapodial. 



Indicated age, Middle Miocene to Lower I'liocene. 

 "Crocodile and Tortoise fragments. 



345. Pointblank road, north of Cold Springs. 



"Cervid, cf. Dromomcrijx, horn fragment, calcaneum. 

 "Camelid, gen. indet, jaw fragments, proximal phalanx. 

 "Rhinoceros, cf. Aphelops, several fragments limb bones, calcaneum. 

 "Large Rhinoceros, cf. Teleoceras or large Aphelops, fragments of limb 



bones. 

 "Proboscidean, cf. TrilopJiodon, unciform. 



Indicated age of the above specimens, Middle Miocene to Lower 

 Pliocene. 



345. One and one-fourth miles north of Cold Springs- 



"Hystricops sp., upper jaw with m*; lower molar. 



This is more primitive than the one known species of this genus, 

 which is Upper Miocene and Pliocene. It is intermediate between it 

 and the supposed ancestral type, the Steneofiber group of the Upper 

 Oligocene and Lower Miocene. 



Indicated age, probably Middle Miocene. 

 '' Blast omcrijx sp., last lower molar. 



This is apparently distinct from any known species, decidedly more 

 progressive than those of the Lower Miocene, less so than the Upper 

 Miocene species B. xvellsi, more perhaps than the Middle Miocene 

 species B. gcmmifer. 



Indicated age, late Middle Miocene or Upper Miocene. 

 "? Orcodont, gen. indet., upper canine and premolar. 



Indicated age, Miocene or Lower Pliocene. 

 "Carnivore, indet., scapholunar and head of metatarsal. 

 "Proboscidean, cf- TrUophodon, fragments of teeth. 



Indicated age. Middle Miocene to Pliocene. 

 "Trionycliid fragments. 

 "Carpike scales. 

 "? Snake vertebra. 



''Mcrychippus sp., cf. srvrisn.s. upiter ami lower teeth and fragmentai'y 

 foot bones; part of right lower jaw. Pt-m^. 



This is a Middle Miocene stage, although small and primitive 

 Merychippi do survive nito the Upper Miocene and Lower Pliocene. 

 No tiMcc of iiiiy of I he distinctively l'i)p(>r Miocene horses among 

 tliesc fi-agmcnts. 



Indicated age, Middle Mio(;ene. 



