DISTRIBUTION OF SPECIES 



181 





Thedfokd Region. 



Eighteen-mile 

 Creek. 





• 



» CD 



"IS 



go 

 '£° 

 o 

 W 



CO 

 CD-° 



o 



CN 



a 

 a 



j-T 

 ® 



03 CO 



-T3 



CD 



cS 

 u 

 o 

 O 



to 



CO 



■iH 



CD C 

 P-O 



co* 

 9 



"a 



oo 

 <-. 



O 



r 



CD 



s 



© 



G° 



o 



c 



CO 

 CD 

 "o3 



A 



O 

 o 



eo 

 O 



S 



CD 



CD 



"o 



ft 



OSTRACODA : 



8 Primitiopsis punciulifera (Hall) 





c 





C 



c 



c 





9 TJlrichia conradi Jones 



w 

















R 













Cephalopoda : 



w 













c 



c 









R 



R 









13 Bactrites arkonense Whiteaves 



















w 



















15 0. lambtonense Whiteaves . 







cf 















16 subulatum ? Hall 



w 

 w 



w 











r 

 c 



R 







17 . exile 9 Hall 















a 



18. 0. arkonense Whiteaves 



















Pteropoda : 

 19 Tentaculites attenuatus Hall (var. ) 



c 









R 











20 T qracilistviatus Hall 









cf 

 C 



C 

 C 





c 



re 





21 Styliolina fissurella (Hall) 









? 





22. Coleoprion f tenuis Hall 





w 



s 



c 

 c 







23. Hyolitlies aclis Hall 





















Gastropoda : 



24. Platyceras bucculentum Hall 



25. P. thetis Hall ■ 















R 















r 

 r 





26. P. erectum Hall 



w 













27. P. arkonense S. and G 



c 





R 

 r 



R 

 r 

 r 













28 P. subspinosum Hall 









r 



R 



re 







29. P. carinatum Hall 



w 









30. P. qulnquesinuatum Ulrich 













31. Ovthonychici conicum Hall 













c 



? 

 re 



r 





32. Diaphorostoma lineatum (Conrad) 



33. D. plicatum (Whiteaves) 



w 

 w 



r 













34. B. shumardi (De Vern.) , 



35. D. turbinatum f (Conrad) 





















s 



















36. Pleurotomaria arkonensis Whiteaves. . 









cf 













37. PI. capillaria Hall 





s 









re 

 R 

 C 



re 

 c 

 r 



R 









38. Phanerotinus laxus Hall 



w 

 w 











R 



r 



r 





b 



39. Loxonema sp 













c 



Peleoypoda : 



40. Aviculopecten princeps (Conrad) 



41. Pterinea flabellum (Conrad) 







"r 



r 



R 





42. Actinopteria boydii (Conr.) 



43. Leiopteria rafinesqii Hall 



w 



















S 











44. Limopteria macroptera (Conr.) 









S 









45. Cypricardella bellistriata ? (Conr.) 



46. Nucula lirata Conr 



w 











r 



R 







s 













47. Nuculites triqueter Conr 









c 





r 







d 



48. Leda rostallata Conr 



w 



w 

 w 















49. Paleoneilo plana Hall 



50. Nyassa arquta Hall 



s 



































51. Grammy sia arcuata f Conr., var 



52. Paracydas lirata (Conr.) 













R 



R 









R 











e 



XXVII— Bull. Geol/Soc. Am., Vol. 13, 1901 



