Act I. 



6 



Actinodesma {new and undetermined form) in J. J. Steven- 

 son's collections from the lowest strata visible in the anticli- 

 nal mountain gaps of Westmoreland and Fayette Counties, 

 Pa. Keport KKK, 1878, p.3 11, list No. 14. 



Actinopteria birostrata. (Drawn from a specimen, so 

 Vni ^_ labelled, in Claypole's collections from Perry 



county, Pa. Not mentioned in lists of Pre- 

 face to report F 2, p. xiv. VIII e ? Hamil- 

 ton? formation. Note. — Of Hall's nineteen 

 species, only the following six have been 



T '-^-f.-'- r-o recognised, as yet, in Pennsylvania.' 



ActinopteT'ia boydii {epsilon?) Conrad. (Hall, Palseon- 

 ^J.5^ iology of New York, Vol. 5, part 1, page 123, 

 plate 23, fig. 5, 6.) Note.— In the text Hall 

 gives A, epsilon as figs. 4, 8, (5 and 6?) but in 

 the plate lists Actinoptera (sic) epsilon as fig. 4, 

 and hoydi as figs. 5, 6. Till g. Lower part of 

 H.V,j. ^"'***^*^j .23; Chemung formation at Ithaca, N. Y. 



Actinopteria delta. Hall, Palaeont. New York, Vol. V. 

 3 part 1, page 121, plate 23, fig. 3 ; fine concentric 

 striae on the shell, obscure on the cast — YIII g. 

 Lower part of the Chemung formation at Ithaca, 



N. Y. 



H.V, 











Actinopteria decussata. (Hall, Pal. Vol. V, part 1, 1883, 



platel8,fig.ll; Hamil- 

 ton). Found by E. 

 W. Claypole ; 1 spec. 

 82, at Barnett's mills, 

 in Hamilton upper 

 slate. Perry county ; 

 and three specs. 13, 

 at Mapleton, in Hunt- 

 ington county. Pa. 

 See Cat. 000; F 2; 

 and T 3, page 109.— 

 YIII G. Hamilton. 



"■'^: 



