331 



Left. 



Leptodesma acanthoptera; wrongly named Avicula acan- 

 thoptera on p. 67 above. (R. P. W.) 



Leptodesma beckii. Hall. Specimens 238-1-4, Clay- 

 pole's Oat. from mouth of Raystown branch Juniata, Hunt. 

 Co., Pa., Cliemung^ Ylllg, — See Appendix. 



Leptodesma demus; recognized by G. B S. in specimen 

 853-6, of Sherwood's collections at Tioga village, Tioga Co., 

 Pa., from Upper Chemung, Vlllg. — See Appendix, 



Leptodesma galene, specimen 9502]of Randall's collections 

 at Warren, Upper Chemung, VIII, — See Appendix, 



Leptodesma lamellatum. Recognized by G. B. Simpson 

 in Randall's Collections at Warren, Pa. Catalogue No. 9502 

 B. — See Appendix, 



Leptodesma leiopteroides, Simpson. New Species, Trans. 



Wll!^.\ 







A. P. S, Phil. Dec. 21, 1888, page — pi. — fig. — founded on speci- 

 mens 9495, 9554, 9555, 9556, of Randall's Collections near War- 

 ren, Pa. (wrongly labeled Avicula.) — Chemung, Ylllg, — For 

 description see Appendix, 



LeptQdesma lichas ? Hall, (Pal. N. Y., Vol. 4, pi. 91, fig. 

 19). Specimen 852-7, 00, p. 236, in Sherwood's collections 

 near Covington, Tioga county ; also 855-4 and 855-25 (Hall's 

 plate 21, figs. 35, 36,) from Sullivan township ; 858-16, one mile 

 north of Mansfield; and 860-42 (Hall's pi. 21, f. 37) from near 

 Mansfield ; all from Upper Chemung,, VIII g, — See Appendix, 



Leptodesma mortoni. Hall, Pal. N. Y., Vol. 5, pi. 21, f. 

 29. Specimen 862-3, (00, p. 236) Ashburner & Fellows' col- 

 lections, 1876, near DeGolier, Tuna creek, McKean county, Pa. 

 Chemung, VIII g, — See Appendix. 



