HORNERSTOWN MARL. 157 



Pelscypoda. 



Cucidlaea sp. 

 Caryatis veta Whitf. 



Gastropoda. 



.Two undetermined species. 



142^. This bed, two feet in thickness, is a nearly black green- 

 sand marl essentially like that below, but it contains an abundance 

 of fossil shells, the following species being recognized : 



Brachiopoda. 



Terebratula hadani Mort. 



PEIvECYPODA. 



Gryphaea dissimilaris n. sp. 

 Polorthius tibicdis (Mort.). 



142^. The highest bed at the Hartshorn marl pits is a green- 

 sand marl similar to that below, 2j^ to 3 feet in thickness, but 

 with a distinctly greener color. It is filled with shells, all of 

 which are stained a yellowish color, and the examples of 

 Terebratula are much less common than in the bed below. The 

 only species recognized in the fauna are: 



Brachiopoda. 



Terebratula harlani Mort. 



PelECypoda. 



Gryphaea dissimilaris n. sp. 



Locality 160. — Two miles north of Pemberton and a little over 

 I mile southwest of Juliustown, an exposure of the Hornerstown 

 marl has afforded the following fauna : 



Brachiopoda. 



Terebratula fragilis Mort. 



