Appendix. 



Leiorh vnchus Newberryi. 



Leiorhynchus Newberryi H. and W., .23d Rept. State Cab., N. Y. In the 

 descriptions of this species it is correctly referred to the Chemung group, but 

 improperly to the Waverly group on the plate. 



Genus PHOLADELLA H. and W. 



Preliminary Notice of Lamellibranchiate Shells of the Upper Helderberg, 

 Hamilton, and Chemung groups, etc. (State Cab. Nat. Hist., Dec, 1869, p. 63). The 

 name (''Hall, u. g.") incorrectly inserted without my knowledge.— R. P. W. 



Pholadella Newberryi. 

 Pholadella Newberryi H. and W. Prelim. Notice, cited above, p. 65. 



AUorisma. (Sedgwickiaf) pleuropistha Meek, Pal. Ohio, vol. i, p. 309, plate 13, 

 Figs. 4« and 46. 



Pleurotomaria Mississippiensis. 



p£ecroTomaria Mississippiensis White and Whitf., Proc. Bost. Soc. Nat. Hist., 

 1862, p. 203, vol. 8. 



Pleurotomaria texliligera Meek, Pal. Ohio, vol. i, p. 314, plate 13, figs, la 

 and b. 



NOTE. , 



The material embodied in the foregoing paper, with the accompanying plates, 

 was originally prepared lor, and was expected to form a part of Volume III. of the 

 Palaeontology of Ohio, and to be published as a part'of the work of the geological 

 survey of that State, then under the directorship of Prof. John S. Newberry ; but 

 owing to a change of policy of the State 1 authorities, the volume was never published. 

 Subsequently, apart of the matter was published in the Annals of the Academy of 

 Sciences in March, 1882, under the title of "Descriptions of New Species of Fossils 

 from Ohio," and references made to the N volume and plates as prepared for. the sur- 

 vey Report. Consequently the new genera and species will date from that publica- 

 tion, except a few of the Crustaceans which had been previously published in the 

 Am. Jour. Scienqe for January, 1880, pp. 33 to 42, in conjunction with one hundred 

 and twenty-five copies of an artotype plate distributed with author's copies. In 

 preparing the matter for republication in the Annals at the present time it became 

 necessary to alter the numbering of the plates 1 from one to twelve, as at first made, 

 to five to sixteen ; otherwise the matter stands essentially as originally prepared. — 

 R. P. W. 



J The original numbering Is restored in the present volume. E. O. 



