W. E. Logan on the Rocks of the Quebec Group. 375 
in relation to the others—which, from 1 to 9, are supposed to be 
in ascending order. ith the exception of those otherwise 
marked, all the determined species have been described by Mr. 
illings. 
he name. This was during my absence in England at the 
nternational Exhibition. Mr. Billings cannot call to his recol- 
I am, my dear Mr. Barrande, yours very truly, : 
gar W. E. Logan, © 
Mr. Joacuim Barranpr, Rue Meziére No. 6, Paris. 
Catalogue of Fossils from the Quebee Group, collected at Point Lévis. 
D|G/A}1/2/3|4/5|6(7(8/9] 
Tetradium?...... PPO nee - 
Graptolithus, several sub-genera (Hall), | , is 
tuguls Mantel... ..scs0s ap ents wit 
: Tretid.. 0's snap scenes a 
“  _Quebecensis .....-.+.---- . 
Obolella Ida... Fee: Vices ve eg ge 
“  desiderata ......-++--+0+ - 
Acro MR. B. cece recerees seeeee * 
Leptena decipiens... Skok Ueiis ele lel ale 
Sy a ae 
Tere e ee ee ee * 
