WHITE PINE MOUNTAINS. 543 



an angle of 24° to 30° eastward. The lower beds are a fine-grained, some- 

 what siliceous, black limestone, varying considerably in compactness and 

 bedding, and frequently passing into calcareous shales. Higher up in the 

 series, they develop more of a dark-blue color, banded with layers of fine 

 arenaceous limestones and occasional cherty bands a few inches in thickness. 



From the large number of organic remains obtained in the hurried 

 study of these strata, it is evident that the field is one that would well 

 reward the palaeontologist, who would make a careful search of the for- 

 mation. 



Messrs. Hall and Whitfield have described from these Pogonip lime- 

 stone beds the following forms : 



Crepiceplialus {Loganellus) Haguei, n. sp. 

 Crepicephalus (Bathyurus) angulatus, n. sp. 

 Crepiceplialus (Loganellus), sp. undet. 

 Crepiceplialus (Loganellus), sp. undet. 

 Conocephalites (Pterocephalus) laticeps, n. sp. 

 BikellocepTialus flahellifer, n. sp. 

 DikellocepJialus quadriceps, n. sp. 

 Ptychaspis pustulosus, n. sp. 

 Ptycliaspis, n. sp. undescr. 

 CJiariocephalus tumifrons, n. sp. 

 Agnostus communis, n. sp. 

 Lingulepis Mcera. 

 Obolella, sp. undet. 



Near the top of the Pogonip limestone, at the northern end of the ridge, 



were found the following forms, which have been referred to the Quebec 



group: 



Ptychaspis pustulosus, n. sp. 



Bathyurus Pogonipensis, n. sp. 



OrtJiis Pogonipensis, n. sp. 



Strophomena Nemia, n. sp. 



Poramhonites ohscurus, n. sp. 



BapJiistoma acuta, n. sp. 



CyrfoUtes sinuatus, n. sp. 



