Raymond : Fauna of Upper Devonian of Montana. 157 



4, 5, 6. The same species. Three views of a larger individual. X 2. 



7. The same species. A cast of a ]3art of a right valve, showing the posterior 

 scar and the pallial line. X 2. 



8, 9, 10. Loxopteria clarkei Raymond. Three views of a small specimen from 

 the red shales. X 2. 



11, Loxopteria holzapfeli Raymond. A fragment, showing a practically perfect 

 posterior wing. X 2. 



12, 13, 14. Loxopteria clarkei Raymond. Three views of a nearly complete 

 specimen. X 2- 



15, 16, 17. The same species. Three views of a large specimen. X 2. 



Plate VI. 



I, 2. Goniophora subrecta Hall? Two views of a specimen from a nodule of 

 limestone. X 2. 



3. The same species. A small and very imperfect specimen from the red shale. 



X 2. 



4. Orthoceras montanenst Raymond. X 2. 



5. 6. The same species. A sectioned specimen, showing the curvature of the 

 septa and the short siphonal funnels. X 2. 



7. Geisonoceras norma/e 1^3.yvcionA. X2. 



8, 9. Geisonoceras accelerans Raymond. The original of No. 9 is much flat- 

 tened. X 2. 



10. Platyclymenia aviericaita Raymond. The type. The inner whorls are not 

 preserved. X 2- 



II, 12, 13. The same species. Three views of a fragment to show the ribs, the 

 suture, and the form of the section. X 2. 



Plate VII. 



1. Platyclymenia americana Raymond. Part of the body whorl of a large in- 

 dividual from the shale, showing how indistinct the ribs become. Natural size. 



2. The same species. A fragment, showing the position' of the siphuncle and 

 the depressed section of the whorls. X 2. 



3. The same species. Another fragment showing some of the inner whorls. 



4. Platyclymenia polypleura Raymond. A large specimen with the inner whorls 

 concealed. X 2- 



5. The same species. A specimen showing a part of the inner whorls. X 2- 



6. The same species. A portion of a body whorl, showing the numerous ribs. 



X2. ■ 



7. Platyclymenia annulala var. densicosta Freeh. A copy of Freeh's figure to 

 show similarity to Platyclymenia polypleura. 



8. Platclymenia annulata (Miinster). A copy of Freeh's figure. 



9. Bactritesnitidus'Rz.ymoxxA. A large, but somewhat cru.shed specimen. X 2. 



10. II, 12. The same species. Fragments showing the suture, siphuncle, septa, 

 and the shape of the section. X 2- 



13, 14. Prolobites simplex Raymond. Two views of a rather large specimen. 

 X2. 



