Sir W. E. Logan on the Fauna of the Quebec Rocks. 217 
us) 1. 
ese two species occur in the same fragment of rock. Of all 
these fossils, 1 Orihis is common to A?, A? and A‘; 1 Leptena, 
1 Camerella, 1 Lingula, 1 Agnostus, and 1 Bathyurus, are common 
to A? and A*; 1 Asaphus is common to A® and A’. 
The dip at P is to the southeastward, and therefore an in- 
verted dip. Northwest of this, and therefore above it, at such-a 
distance as would give a thickness of between 200 or 300 feet, 
we have a band of shale with nodules of limestone, the nodules 
made up of other rounded masses in a matrix holding fossils, 
many of them silicified. From afew of these compound nodules 
we have obtained Orthis 11, Leptena 1; this band we shall-call 
B'. A band like this occurs about half a mile or more to the 
southwestward. It may be a higher band, or it may be the 
Same band, but we shall call it B?. From this we obtain On- 
nowdea (columns) 3, Orthis 1, Camerella 1, Nautilus 1, Orthoceras 
1, Leperditia 1, Trilobites (2 genera undetermined) 2. In another 
position to the southeast, on the southeast of the same anticlinal 
previously mentioned, we meet with a conglomerate band sup- 
Posed to be the same as B?; but, in case it should be different, 
we shall call it B®. Here we have Orthis 3, Pleurotomaria 2, 
Murchisonia 1, Ophileta 1, Helicotoma 1, Nautilus 1, Maclurea 1, 
Orthoceras 8 or 4, Cyrtoceras 1, Bathyurus 1, Illenus 2, Asaphus 1. 
Of all these fossils, 1 Orthis and 1 Camerella are common to B! 
*; the same Orthis and Camerella with 1 Leptcena are com- 
Mon to Bt, At, A? and A?. 
_ To the north of all these exposures, and on the northwest 
side of a synclinal running parallel with the synclinal already - 
are supposed to be not far removed from A? and A?, We shall 
call this cliff A. The fossils from it are Telradium 1, Orthis 1, 
Lingula 2, Trilobites (genus undescribed) 1, with a great collec- 
tion of compound Graptolide, described and being described by 
Mr. Hall under the genera Graplolithus 25, Retiolites 1, Reteo- 
pete 2, ae dine 5, Dendrograptus 3, Thamnograptu 3, 
onema, 
IT have given you these details of localities, because as the 
Sudject requires further investigation we do not yet wish to 
Sommit ourselves entirely as to the equivalency of separate ex- 
Pestres. But there is no doubt that the whole is one Phe 
Whee deposited under one set of alternating circumstances. the 
Whole fauna, as known up to the present time, is composed of— 
