A VIC, 



76 



^\U,3.H/tt7. 2 



lected by C. E. Hall, 

 1876. Rt. 000, Clay- 

 pole's list, 72-1, spec, 

 from near T o w a n d a , 

 Bradford Co., Pa. Re- 

 ported by I. C. White, 

 from Rupert (Catawissa 

 and Bloomsburg Sec- 

 tion) bed 30 (59), G7, 

 p. 69 (286), one foot 

 thick crowded with gen- 

 era and species, 900' over 



the top of the Genesee, i. e. in Chemung, VIII g. 



Aviculopecten princeps. See Appendix. 



Aviculopecten rectilaterarius. Avicula rectilaterarea. 

 See Appendix. 



Aviculopecten rugaestriatus. {Lima rugwstriata.) 

 V»'^- n- ,^ Hall, 1843, page 264, fig. 119, 3. VIII g^ 



Chemung formation. Moderately con- 

 vex ; ears not very distinct from the shell ; 

 strong radiating striae, which grow larger 

 towards the base, and are crossed by raised 

 wavy plates (lamellae), giving to the sur- 

 face a rough appearance, which is visible in 

 \ the enlarged portion (little figures). Found 

 at Rockville; Hubbieville, All. Co., N. Y^ 



Aviculopecten signatus. (Avicula signata.) Hall, 

 S^m^m 1S43, page 264, fig. 119, 5. VIII g. Chemung for- 

 mation. The surface is marked by sharp concentric 

 lines or lamellae, which give the shell a peculiar as- 

 •fi iij/vpect. Found at Rockville, All. Co., N. Y. 



Aviculopecten striatus. {Pecten striatus.) Hall, 1843, 

 page 264, fig. 119, 7. VIII g. Chemung forma- 

 tion. This species differs from all the others in 

 its fine even radiating striae. Its ears are small 

 and nearly equal; shell erect (not lopsided)^ 

 moderately convex. Steuben Co., N. Y. 



