Raymond — Upper Devonian Fauna with Clymenia. 119 



2. Green shale zone. — These are the green shales described 

 by Peale (part of A, above). Fossils abound and further col- 

 lecting should reveal a much larger fauna. Clymenia and 

 Entomis are abundant, associated with a great number of 

 brachiopods and lamellibranchs. For the complete faunal 

 list, see the table below. 



3. White olocky shale. — The exact horizon of this zone is 

 not known, as the fossils were obtained at a locality where the 

 layers seemed to be somewhat disturbed. In the field it 

 appeared to be above the green shale, but it could not be 

 located in any place where the beds were undisturbed. The 

 faunal list is short, but the fossils are abundant : — 



Fish spines, 



Goniatite, either Cheiloceras or Tornoceras, 



Orthoceras sp., 



JBellerophon sp., 



Posidonomya sp., very abundant, 



Lingula sp. 



4. Gray limestone zone. — This limestone weathers readily 

 and produces great quantities of fine fossils, mostly brachio- 

 pods. Two species of Clymenia occur in this zone, but the 

 goniatites are very rare. This same limestone is well exposed 

 in the Devonian ravine at Logan, but no specimens of Cly- 

 menia were found at that locality ; it has, however, furnished 

 two fragments of cups of crinoids, one of which has been 

 identified as a species of Mariacrinus, by Mr. Frank Springer. 

 This is of interest, as it is the first crinoid reported from the 

 Devonian of the Rocky Mountains. The fossils found in the 

 limestone at these two localities are indicated in the table 

 below. This seems to be the upper limit of the range of 

 Clymenia. 



5. Yellow sandstone zone. — This sandstone or sandy lime- 

 stone forms the capping bed of the Devonian both at Three 

 Forks and at Logan. A few beds are very fossiliferous and 

 the fauna indicates a transition into the Mississippian (Madison 

 limestone). 



At Three Forks were found : — 



Prorhynchits sp., Ambocoelia gregaria, 



Spring othy vis carteri, Gleiothyris sp., 



Spirifer disjunctits, Schuchertella inflata, 



Pugnax pugnus, Productus sp., 



Camarooetchia contracta, Edriotrypa sp. 

 Leiorhynchus mesicostale ? 



The fossils of the various zones are tabulated below to show 

 the range of the species : 



