52 REPORT OF THE 



3. — Trenton Group. 



The gray silicious limestone seen resting on quartz on Sul- 

 phur Island, north of Drummond's, is regarded as the lowest 

 fossiliferous limestone within the limits which have come under 

 observation. On the south and south east sides of Copper Bay, 

 in Montreal Channel, is observed a series of limestones sup- 

 posed to belong but a short distance higher up. The following 

 fossils have been recognized from the extensive collections 

 made along this shore. I have not the time at present to 

 classify them stratigraphically ; nor would such particularity 

 comport with the scope of the present report. They are re- 

 ferred to their localities: 



At 158, Bhynchonella plena. 



At 160, in fragments on the beach, Subulites elongatus, Gy 

 pricardites ventricosus, Murchisonia bicincta. 



At 7(2 A.=d. in the Synoptical Table, next chapter, Bhyn- 

 chonella plena, Bhynchonella altilis, Strophomena (n. >p.) 



At 163=162 F.=uppcr part of 710 D , Schizocrinus, Leplwna 

 subtenla, Subulites elongatus, Gypricardites ventricosus, Pluroto- 

 maria subconica, Bhynchonella plena, Asaphus gigas. 



At 164=162 B., Strophomena camerata. 



At 166, (not in place) Bhynchonella plena, Telradium cellu' 

 losum. 



At 709, the north-eastern extremity of the headland on the 

 south-east side of Copper Bay, Leperditiafabulites, Leptcena sub' 

 tenia, Dalmannites cailicephalus, Ambonychia amygdalina, Stropho_ 

 mena plicifera, Gypricardites (sp ? ), Asaphus gigas, Orthoceras 

 anellum (?) Pleurotomaria subconica, Illcenus, Subulites n. sp, 

 Gypricardites ventricosa, Murchisonia, (sp?) Orlhis bellirugosa, 

 0. trisenaria. 



At 711, Strophomena filitexta, Beceptaculites 



At 785, Bhynchonella plena, Orlhis (resembling 0. pectinella, 

 but distinct). 



At 786, Streptelasma corniculum * 



*The region from which the foregoing fossils were obtained, is colored on Fofter and 

 Whitney's map, as lying along tho northern margin of the CalciIVrous tantlstono belt. For 

 identificatioas of species 1 am under great obligations to Proi. Hall. 



