192 ON THE ROCKS OF THE QUEBEC GROUP. 



Ridge, and running parallel with it, he has met at D, with anew 

 species of Dikelocephalus 



To make the distribution of the fossils, which we in Canada (in- 

 cluding Mr. Devine and Mr. Cayley) have obtained at Point Le>is, 

 more clearly understood, a catalogue of them has been prepared, 

 with the specific names of those which have been described, and a 

 separate column for each of the bands, and made a part of the 

 present communication. In this catalogue no certain stratigraphical 

 place is assigned to the bands D, G, and A, in relation to the 

 others ; which, from 1 to 9, are supposed to be in ascending 

 order. With the exception of those otherwise marked, all the 

 determined species have been described by Mr. Billings. 



Mr. Marcou, it appears to me, has gone somewhat out of his 

 way to insinuate a discourtesy towards you on the part of the Ca- 

 nadian Survey, in that we have, as he says, distributed fossils of 

 the Quebec group, in England, to more favoured geologists than 

 yourself. Mr. Marcou could not have stated this from his own 

 knowledge, as it is not consistent with fact. The truth of the mat- 

 ter is precisely the reverse of this. We long ago did our- 

 selves the pleasure of transmitting to you a small collection of the 

 principal species ; while we have presented none to any other of 

 our geological friends in Europe. On this side of the Atlantic we 

 have exchanged a few specimens with Col. Jewett, of the New York 

 State Museum, for New York species, of which we stood greatly 

 in want ; and we are just now about to make a small exchange with 

 Mr. A. H. Worthen, State geologist of Illinois, for species from 

 several of the Western States, of which we have long been anxious 

 to possess authentic specimens. Mr. Marcou seems especially 

 aggrieved that he did not obtain a pygidium of Dikelocephalus 

 magnificus, asked for, as he states, in your name. This was during 

 my absence in England, at the International Exhibition. Mr. Bill- 

 ings cannot call to his recollection that the application was made 

 in your name. Such an application would have afforded him the 

 opportunity of informing Mr. Marcou, that you were probably 

 already supplied, in the collection sent ; but it would not have 

 altered the propriety of what, in conformity with his duty, he found 

 himself under the necessity of replying ; namely that he was not 

 authorized to distribute the specimens of the Provincial Collection. 

 I am, my dear Mr.Barrande, 



Yours very truly, 

 M. Joachim Barrande, W. E. LOGAN. 



Rue Meniere No. 6, Paris, 



