252 



fragments, chiefly heads Find 2yyglcUa of Trilobites ; and it is very difficult 

 to obtain specimens on account of the great hardness of the stone. I 

 succeeded, however, in collecting the following species : Conoccpha- 

 lites Zenkeri; DikcUocephaluf: magnijicus, D. plmiifrons, D. megalops, 

 D. cristatus ; pygidia of a DUcelloceplialus not named by Billings, but 

 figured No. 11 and 12 ; Arionellus cyHndricus, A. subclavatus ; Meno- 

 ceplialus SedgeivicH, MenocepTialus globosus ; a large Capvlus, an 

 Orfhisina, and the stems and even the foot of a Crinoid. 



All the known species of the Redoute limestone have been described 

 in a masterly manner by Mr. Billings in his memoir, On some species 

 of Fossils from the limestone near Point Levi, opposite Quehec, August, 

 1860. I did not find the DilcellocepTicdus Belli and D. Oweni, nor 

 Agnostus Americanus, A. Orion and A. Canad^Msis, which Mr. Bil- 

 lings describes as part of his fauna of Limestone No. 1. Without 

 touching the stratigraphical question, Mr. Billings separates the species 

 under the heads of Limestones Nos. 1, 2, 3, and 4. His numbers 2, 3, 

 and 4, are evidently what I call the Calciferous Sandstone strata, and 

 his No. 1 represents in part the Redoute Limestone. I say in part, for, 

 perhaps, he has put in No. 1 some specimens resembling those of the 

 Redoute Limestone, especially when broken in very small fragments, 

 that really belong to the strata de la terre du Cure. For instance, I 

 found a good specimen of his BatJiyurus hitubercidatus, not at the 

 Redoute, but at the terre du Cure, and I did not find a single speci- 

 men or trace of the genus Bathyurus in the Redoute Limestone ; con- 

 sequently my observations in the field do not lead me to consider the 

 genus Bathyurus as a primordial one ; it belongs exclusively to the 

 lower part of the second fauna. According to my observations, the 

 fauna of the Redoute Limestone is entirely primordial, without any 

 mixture whatever of fossils of the second fauna, being limited to the 

 genera Conocephalites, Dikellocephalus, Arionellus, Menocephalus, 

 Capulus, Orthisina, and a Crinoid, which, characterize the primordial 

 fauna in America as well as in Europe. 



The inferior part of the St. Albans group is formed by what has 

 been called the Sillery and Chaudiere red shales and sandstones, in 

 which no fossils have as yet been found. In Canada this part of the 

 group is much more developed than in Vermont, or perhaps the differ- 

 ence in colors is due to metamorphism in Vermont. 



Finally, there is a beautiful quartzite at the falls of Montmorency, 

 which 1VL-. Logan, for an unknown reason, continues to call Lauren- 

 tian gneiss. It forms the bed of the Montmorency river and the 

 chasm of the precipice. It is indistinctly stratified by beds from ten 

 to twelve feet thick, very dark and compact, and has all the characters 

 of a metamorphic sandstone or true quartzite. Direction or strike N. 

 45° E. to S. 45° W., dipping south-east at an angle of 80 or 85 

 dcizrees. 



