Grabau — Faunas of the Hamilton Group. 



309 



Anthozoa . 



152 Streptelasma rectum, r 

 161 Monotrypa fruticosa. r 

 Aulopora sp. r 



In the lower half Zdorhynchus multicostus is extremely abundant while 

 in the upper half Ambocoelia umbonata predominates. Spi/rifer mucronafais 

 and Chonetes lepida are equally abundant throughout. This might be con- 

 sidered the normal S. m ucronatus fauna. 



r. The Athyris spiriferoides bed. 



This is a bed ol calcareous concretions, quite continuous and about a foot 

 in thickness. In it A.thyris spiriferoide& is extremely abundant and well pre- 

 served. The other fossils are rare, and are mainly found in the shale in which 

 the concretions are embedded. The bed is nine feet below the Encrinal lime- 

 stone. The following is the list of fossils : 

 Crustacea : 



6 Primitiopsis punctulifera. r 

 Pteropoda : 



13 Tentaculites bellulus. r 



Lamellibranchiata : 



55 



Paljeoneilo tenuistriata: r 



56 



P. fecunda. rc 



58 



P. emarginata. r 



Brachiopoda : 



7V) 



Pholidops Haniiltoniae. r 



82 



Rhipidomella Vanuxemi. r 



91 



Stropheodonta perplana. r 



99 



Chonetes scitula. r 



100 



C. lepida. r 



116 



Ambocoelia umbonata. r 



120 



Nucleospira concinna. r 



121 



Athyris spiriferoides, C 



Bryozoa : 





141 



Stictopora incisurata. r 



Anthozoa; 



162 



Aulopora serpens, r 



