Contributions to Invertebrate Palaeontology. 609 



APPENDIX. 



Leiorliynclius HfcAvlierryi. 



Leioehtnchus Newbeekyi H. and W., 23cl Rept. State Cab., N. Y. In the 

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

 improperly to the Waverly group on the plate. 



Genus PHOI.ADELL4 H. and W. 



Preliminary Notice of Lamellibranchiate Shells of the Upper Helderberg, 

 Hamilton, and Chemung groups, etc. (State Cab. Nat. Hist., Dec. 18G9, p. 63). 

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



Pholadella \ewlierryi. 



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

 Allorisma (Sedgwickia?) pleuropistha Meek, Pal. Ohio, vol. i, p. 309, plate 13, 

 Figs. 4 a and 4 6. 



Pleiirotoiiiaria Mississippiensis. 



Pleurotomaria Mississippiexsis White and Whitf., Proc. Bost. Soc. Nat. 

 Hist., 1862, p. 203, vol. 8. 



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

 and h. 



NOTE. 



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

 was originally prepared for, 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 authorities, the volume 

 was never published. Subsequently, a part 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 volume and plates as prepared for the survey report. Consequently the 

 new genera and species will date from that publication, except a few of the 

 Crustaceans which had been previously published in the Am. Jour. Science 

 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 prepar- 

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

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

 made, to five to sixteen ; otherwise the matter stands essentially as originally 

 prepared. — R. P. W. 



