NO. 5 PRE-DEVONIAN PALEOZOIC FORMATIONS 34I 



Feet Meters 



Fauna. — A large fauna was found in a gray limestone 18 

 feet (5.4 m.) below the summit of la (64p) : 

 Eoorthis sp. 



Syiitrophia isis Walcott 

 Ozarkispira leo Walcott 

 IValcottoceras monsensis 



(Walcott) 

 Endoccras robsoiicnsis (Walcott) 

 Keytclla sp. 

 At about the same horizon as (64p) on the west 

 side of Mons glacier two smaller collections (65f and 

 65g) were made from blocks of limestone that had 

 fallen on the glacier (65f ) : 



Eoorthis puHlliis Walcott 

 Syntrophia isis Walcott 

 Ozarkispira leo Walcott 

 Plethopeltis sp. 

 Hystricurus sp. 

 Leiostegiutn sp. 

 and from (6sg) the following species: 

 Eoorthis sp. 

 Syntrophia isis Walcott 

 Ozoinia cf. lucan Walcott 

 Hystricurus sp. 

 At a lower zone 60 feet (18.3 m.) below the summit 

 of la the collection included (66u) : 



LinguleUa sp. undt. 

 Syntrophia 

 Eoorthis 



Osomia lucan Walcott 

 Xenostegium eucerus Walcott 

 Fragments of trilobites were seen in the limestones 

 beneath the zone of (66u), but it was not until a 

 layer was found six feet (1.8 m.) from the base of 

 10 that a few of them could be recognized. These 

 included (640) : ' 



Agnostus sp. 

 Plethopeltis sp. 



cf. Plethomctopus annatus (Billings) 

 lb. Massive-bedded, dull gray limestone, with much in- 

 cluded fine arenaceous matter that gives the weathered 



surface a slightly roughened appearance 740 225.6 



Fauna. — None observed. 



Total Mons formation 975 297.2 



^ The material from this locality was not found in situ. These fossils are 

 not referable to the Mons but to the Lower Ozarkian. — C. E. R. 



