NOTES ON THE PALEONTOLOGICAL PUBLI- 

 CATIONS OF PROFESSOR WILLIAM WAGNER 



BY 



WILLIAM HEALEY DALL, A.M., 

 Professor of Invertebrate Paleontology, Wagner Free Institute of Science. 



PROFESSOR WAGNER'S best-known publication on American Paleon- 

 tology is his paper in the eighth volume of the first series of the Journal 

 of the Academy of Natural Sciences in Philadelphia. This article occupies 

 pages 51-53, is illustrated by Plate i of this volume, and was published in 

 1839, having been read before the Academy January 2, 1838. It is probable 

 that extra copies of this paper were printed some time in 1838, as such a 

 copy, though not dated, is now before me, which differs in typography, 

 pagination, and plate numbers from the text of the Academy's Journal. The 

 following collation will show the discrepancies : 



In the Academy's text the references to the figures of Pecten iiiarylandi- 

 ctis and Venus inocerifonnis are printed "figure i" and "figure 2" respectively, 

 but on the plate the numbers are reversed. 



I conclude from these discrepancies that the extra copy appeared at a 

 time when it was supposed another plate would precede Professor Wagner's in 

 the Journal, and hence before the printing of the latter and not subsequently. 



From the figures and descriptions it appears that Pecten niarylandicus is 



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