149 



E. anomala Dawson. 



Cardinia subquadrata Dawson. 



Liopteria dawsoni Beede, {Bakewellia antiqua Dawson} 



Modiola pooli Dawson. 



Parallelidon dawsoni Beede. 



P. hardingi Beede, (Macrodon hardingi Dawson). 



Gastropoda. 



Naticopsis howi Hartt. 

 N. dispassa Dawson. 

 Platyschismal dubium Dawson. 

 Loxonema acutulum Dawson. 

 Murchisonia gypsea Dawson. 



Pteropoda. 



Conularia planicostata Dawson. 



Cephalopoda. 



Nautilus avonensis Dawson. 

 Gyroceras harttii Dawson. 

 Orthoceras dolatum Dawson. 

 0. vindobonense Dawson. 

 0. laqueatum Hartt. 

 0. perstrictum Hartt. 



Trilobita. 



Phillipsia howi Billings. 



Ostracoda. 



Beyrichia jonesii Dawson. 

 Leper ditia sp. 



GEOLOGICAL AGE OF THE WINDSOR SERIES. 



Previous to Lyell's visit in 1843, the Windsor series 

 was generally regarded as lying above the Coal Measures, 

 probably from the resemblance of the former to the 

 gypsum-bearing Permian rocks of Europe. Even Logan 

 [9] in 1842 was of the opinion that "the gypsiferous strata 

 and the associated shales, sandstones, and fossiliferous 

 limestones are not only newer than the coal-measures, 

 but overlie them unconformably, " founding his conclu- 

 sions respecting the geological age of the formation on 



