316 



Report of the State Geologist. 



87 



Orthothetes arctostriata 



r 



88 



0. perversa r 



J. 





89 



Stropheodonta demissa. 



R 



91 



S. perplana. rc 



J. J. 





92 



S. inequistriata. rc 





99 



Chonetes scitula. r 





100 



C. lepida. r 





101 



C. coronata. r 





103 



Productella spinulicosta. 



c 



105 



Spirifer mucronatus. C 





110 



S. audaculus. c 





112 



S. macronotus. c 





114 



S. fimbriates, rc 





116 



Amboccelia umbonata. r 





119 



Cyrtina Hamiltonensis. c 





120 



Nucleospira concinna. C 





121 



Athyris spiriferoides. r 





124 



Atrypa reticularis, r 





127 



Camarotcechia Horsfordi. 



r 



Bryozoa : 







141 



Stictopora incisurata. C 





143 



Ta3niopora exigua. r 





148 



Fenestella sp. c 





Anthozoa : 



152 Streptelasma rectum, r 



The shale above this is usually barren, Stictopora incisurata occasionally 

 occurring, while the upper few inches are devoid of fossils and calcareous 

 material in general as already noted. 



C. The fauna of the Encrinal limestone or the Spirifer sculptilis fauna. 



The Encrinal limestone contains a distinct association of fossils, many 

 of which are not found outside of it. In this region Spirifer sculptilis is 

 entirely confined to it, .-SI mucronatus being scarcely represented. S. sculptiii-- 

 is therefore chosen as the characteristic form, though it is by no means the 

 most abundant Spirifer in this rock. Many of the species which are only 

 sparingly represented in the Lower shales are here abundant. Such are 

 r Tropi(lohj)tus carinatus and Rhipidomella Vanuxemi. In general most ot the 



