I CONTRIBUTIONS TO PALiEONTOLOGY. 177 



several months that I became aware of the existence of another cop}- 

 in the hands of Mr. Paterson, and I here communicate a reprint of 

 it, in order that the scientific world may know what was originally 

 printed. 



At the same time, some additional matter, the results of previous 

 studies, ^vas added to the Report; in regard to which, that there 

 might be no misapprehension, I sent a note to the printer, to be 

 inserted at the end, stating that additions had been made during 

 1860*. To honest minds, there could be no difficulty in appreciating 

 my motive for appending that notice. I could gain nothing in time 

 by adding this new matter to the Report : I could as well have 

 printed and circulated it separately, and with the date of publica- 

 tion. There is no antedating, nor attempt at antedating : the Report 

 was published in December, 1860. The delay in publication was due 

 simply to the non-completion of the engraving of plates belonging to 

 the preceding part of the Report; and this gave me an opportunity 

 of making the corrections, and adding other matter. 



* I was subsequently informed by the printer that this note did not reach him till 

 the last form was in press, and consequently it does not appear in some of the first 

 impressions. 



[Senate, No. 11 6, J 23 



