712 



GEORGE W. STOSE 



rangle. In the Chambersburg belt the formation may be divided into 

 4 faunal zones. 



From the lower zone, characterized by Dinorthis pectinella, 20 

 species were collected, of which the following have been determined 

 by Mr. Ulrich: 



Receptaculites cf. occidentalis. 

 Echinosphaerites sp. undet. 

 Orocystites ? 

 ? Chaetetes cumulata. 

 Hemiphragma irrasum. 

 Dalmanella testudinaria, small n. 



var. 

 Dinorthis pectinella. 



In the second division, characterized by NiduHtes, 3 

 collected and the following tentatively identified : 



Hebertella bellarugosa. 



H. cf. borealis and vulgaris. 



Rafinesquina inquassa? 



Plectambonites pisum var. 



Triplesia n. sp. 



Leperditia fabulites pinguis. 



Ampyx normalis. 



species were 



Nidulites cf. favus. 



New genus of Amygdalocystidae. 



New genus of Pleurocystidae. 



Bolboporites n. sp. 



Praspora contigua. 



P. cf. lenticularis. 



Stroma totrypa (? Diplotryna) sp. 



undet. 

 Hemiphragma irrasum? 

 Stomatopora infiata. 

 S. proutana. 



Orthis sp. undet. 

 Plectorthis n. sp. 

 Dalmanella testudinaria var. 



Dalmanella n. sp. (a£f. D. subae" 



quata). 

 Scenidium anthonense. 

 Strophomena cf. filitexta. 

 Rafinesquina cf. inquassa. 

 R. cf. incrassata. 



Leptaena n. sp. 

 Plectambonites cf. pisum. 

 P. asper (Reudemann). 



Triplesia n. sp. 

 Ampyx n. sp. (cf. A. normalis and A. 



halli). 

 Pterygometopus cf. callicephalus 



(variety approaching P. schmidti). 



Ceraurus pleuraxanthemus. 

 In the third division, which is often crowded with fossils, 43 

 species were collected, of which the following have been determined: 



Diplotrypa sp. undet. 

 Rhinidictya cf. neglecta. 

 Plectambonites n. sp. 

 Leptaena n. sp. 

 Parastrophia cf. hemiplicata. 

 Ulrichospira n. sp. 

 Echinosphaerites sp. 

 Hemiphragma cf. irrasum and otta- 

 waensis. 



Arthropora cf. bifurcata. 



Rhinidictya cf. neglecta. 



cf. Trematopora ? primigenia. 



Orbiculoidea cf. lamellosa. 



Orthis cf. tricenaria. 



Scenidium cf. (Merope). 



Dinorthis n. sp. (aff. D. subquad- 



rata). 

 Strophomena n. sp. 



