ACTI. 



V/n c. 



Actinodesma erectum. (Avicula erecta, Conrad, 1842, 



Jour. Acad. Nat. Sci., Phila. Vol. 

 8, pi. 12, fig. 5. Eedrawn by G. B. 

 Simpson. — Hamilton group.) 



Well preserved specimens found 

 by J. J. Stevenson in the river 

 gaps of Fayette and Westmoreland 

 counties. Pa., and determined by 

 Prof. James Hall, are especially 

 interesting, as arguing the thinn- 

 Conry'^^mmSS^-^.A MS Mil, 12 Ing out of the overlying Cattskill, 

 and at the same time proving this fossil to have lived to the 

 end of the Chemung age. See Report KKK, 1878, pp. 309, 311. 



Actinodesma subrectum. 



( Wliitfield'^s DesG. Weio Spec^ 

 . , Foss,,^ Ohio), 

 /^2L Drawn by G.B. 

 Simpson from 

 specimen 59- 

 B. 18, in Clay- 

 pole's collec- 

 tions from Per- 

 ry Co. Pa. See 

 preface to Rt. 

 F 2, page xiv. 

 (It closely re- 

 sembles Glyp- 

 todesma erec- 

 tiim^ Hall, Pal. 



N. Y., Vol. V, part 1, plate 12, fig. ^,)—Yin g, Hamilton for- 

 mation. Perry Co., Pa. 



Clai] 



Note. In bottom bed of Hamilton middle shale, almost in 

 contact with underlying sandstone, in railroad cut near Bedford 

 Co. line, Cove Station, Huntingdon Co. Pa., I. C. White, Re- 

 port T. 3, page 111. — In Claypoles's Perry Co. collections are 

 the following examples of this fossil : 59-B-4 (3) ; 69-B-18 (5) ; 

 59-18 (2); 94-9 (1); 196-5 (3=^14 soecimens in alD. 



