Bulletin 14 



288 



c Dalmanclla s^ibcvqiiata var. r Bathyurus spinigcr. 



pervetus. 

 r Pledorthis plicatcUa. 

 r Rafinisquina altct'iiata. 

 r Rhynchotrcma incFquivalve. 

 c Zygospira recui'virostris. 

 c Columnaria alveolata. 

 r Sti^lopora cleganhila. 



r Leperditia canadensis 



var. nana. 

 c Leperditia fahulites. 

 c Streptolasvia cornicii- 



lum. 

 c Moiiticulipora lyco- 



perdon. 



21. Impure, dark gray limestone containing 

 much chert. This zone is capped by a two inch 

 layer of chert which has been polished by the a(5lion 

 of the ice, glacial striae showing upon it. This is 

 probably the layer spoken of by Prof. Emmons. 

 (See historical sketch.) 5 ft. 6 in. 239 ft. 



c Strophoniena incnrvata. 

 r Zygospira reciwvirostris. 

 r Asaphzis plaiycephaliis. 

 r Leperditia fabidites. 



• 

 22. Covered. 4 ft. 



r Leperditia canaden- 

 sis var. nana. 



r Stroniatoceriuni rogo- 

 sum. 



r Columnaria alveolata. 



>43 ft. 



23. Impure, light gray, coarse grained lime- 

 stone containing nodules of chert. 6 ft. 8 in. 249 ft. 



8 in. 



c Cuneamya sitbtruncata. 

 rr Murchisonia gracilis. 

 rr M. milleri. 

 c Rafinisquina alternata. 



rr Illcenus ar^iirus. 

 rr Dalmanites calliceph- 



alns. 

 rr D. eboraceus. 



X Rhyyichotrema incequivalve. c Leperditia fabidites. 

 c Strophomena incurvata. c Stromatocerium rogo- 

 r PleSlorthis plicateila. sum. 



r Asaphiis platycephalus. c Columnaria alveolata. 



r Streptolasma corniciUiini. r Monticidipora lyco- 



perdon. 



