482 H. M. AMI THE GEOLOGY OF QUEBEC. 



Quebec, and Dr. Selwyii has placed an interesting collection of these rocks, 

 made by Mr. Weston at Montmorency falls, in the hands of Mr. Ferrier, 

 who will discuss their lithological and petrographical characters in the near 

 future. 



The Trenton : Lorette. — At Lorette falls, on St. Charles river, the Trenton 

 limestones are seen to rest un conformably over the Laurentian. They con- 

 sist at the top of thinly bedded, impure limestones, holding a number of 

 characteristic fosssls, including — 



Strophomena alternata ; Bellerophon bilobatas ; 



Lepkena sericea ; Trinueleus concentricus ; 



Orthis testudinaria ; Illcenus, sp. und. 



There are some fifty feet of strata exposed in the whole escarpment (which 

 faces the north) here along the line of contact at the falls, the lowest of which 

 are rather heavily bedded and consist of light gray semi-crystalline lime- 

 stones, abounding in fossil remains characteristic of the Trenton, the presence 

 of Litidtes undatus, Emmons, at the base indicating proximity to the Black 

 River formation. The following species were obtained in the lower beds of 

 the exposure : 



Pacliydlclya acuta; Ambonychia bellistriata (?) ; 



Batostoma ottawaense ; Pterinea trentonensu ; 



Prasopora hjcoperdon ; Litidtes undatus; 



Disclna pelopea ; Endoceras proteiforme ; 



Lingula philomela ; Aparchites mundulus ; 



Strophomena alternata ; Primitia ivhiteavesii ; 



Leptcena sericea ; Isochilina amii ; 



Orthis testudinaria ; Primitia mundula ; 



" sp. und. ; 5e?/ric/u'(X, sp. und.; 



" sp. nov. (?) ; Ceraurus pleurexanthemus ; 



Anastrophia hemiplicata ; Calymene senaria ; 



" var. (?) ; Encrinurus vigilans ; 



Comdaria trentonensis ; Dalmanites callicephalus ; 



Theca, sp. nov. ; Trinueleus concentricus ; 



Bellerophon bilobatus; Asaphus platycephalus ; 



Bucania pu7ictiJerou^ ; Z/«c/tas, sp. und. ; 



Ctenodonta dubia; Illcenus milleri. 



Charlesbourg. — At Charlesbourg the Trenton terrane may be seen to ad- 

 vantage some four hundred yards north of the village, and also at Temple- 

 man's quarry, a few paces east of the road. Here the strata are horizontal, 

 while at Lorette they are considerably inclined, the dip there increasing from 

 four or five degrees to nearly thirty in the vicinity. The rock at Temple- 

 man's quarry is rather pure and crystalline, takes a good dressing, and the 



