Avic. 



74 



H.94. 



Aviculopecten equilaterus. ( Avicida equilatera. ) Hall, 



y\\\X 1843, page 180, fig. 71; Marcellus formation. In 



Pennsylvania found by White in the richly fossilifer- 



ous bed near the top of the Marcellus, and in bed 



100' beneath the top of the Hamilton, on Big and 



"• Little Fishing Creek, Hemlock t., Columbia Co., Pa., 



G7, pp. 229, 230.— F77/5, VIII c. 



Aviculopecten fragilis. {Avicula fragilis.) Hall, 1843, 



page 222, figs. 41,1, 2,— VIII e, 

 Genesee formation. In Pennsyl- 

 vania, Erie Co., Springfield t.,below 

 Cherry Hill P. 0., Grifiith section, 

 near base of Blue Shale, Q4, p. 

 255 ; multitudes in 6" shale lying 

 50' above top of Girard Shale, 

 Girard t.. Babbit's Sect. Q 4, p. 258- 

 This, or some closely allied form, characterizes the 

 opening of Chemung life, at top of non-fossiliferous 

 Girard Shale. Q4, p. 262.— VIII g. 



Aviculopecten {Strellopteria?) herzeri. See Appendix, 

 Found by Stevenson in Decker's cr. shale, Morgantown. XII 



Aviculopecten interlineatus. (Meek & Worthen, 1860, 

 Proc. Acad., N. S., Chicago. Lower Coal Meas- 

 ures; Illinois Report, Vol. 2, p. 329, plate 36, 

 fig. 7.) Collett's Indiana Rt. of 1883, page 145, 

 plate 30, fig. 9, outside view of left valve, 7iat- 

 ural size ; marked by ten or twelve concentric 

 sharp slender ridges. — XIII Rather rare, but 



found at distant points of Illinois and Arizona, and to be 



sought for in the Upper Coal Measures. — XV. 



Aviculopecten lyelli, Dawson. Acadian Geology, 1868, 



iniimruoj 



H 



Dawson. Acdd. Geol. 1868. 



p. 305. 



page 305, fig. 

 Ill, a beauti- 

 ful scallop 

 shell of the 

 Nova Scotia 

 carboniferous 



limestone formation, with 60 distinct ribs.. — XL 



