. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Aviculopecten carboniferus. {Carbonarius?) {Pecten XIH,'^Bi^P^ ^®f]^P'_ carloniferus^ Stevens, Am. Jour. Sci. Vol. 25,1858, page 261.) Col- let's Indiana Rt. of 1883, page 144, plate 28, fig. 5, left valve, natural Ino(/^^ ^ ISS'S.^'^^^iil^Sg size ; fig. 6, right valve of another individual.—XIII^ coal measures, at several places in Indiana. (Note.—Probably the same as Swallow's Pecten Iroadheadi^ upper coal measures of Missouri. No doubt the same as Geinitz'
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Aviculopecten carboniferus. {Carbonarius?) {Pecten XIH,'^Bi^P^ ^®f]^P'_ carloniferus^ Stevens, Am. Jour. Sci. Vol. 25,1858, page 261.) Col- let's Indiana Rt. of 1883, page 144, plate 28, fig. 5, left valve, natural Ino(/^^ ^ ISS'S.^'^^^iil^Sg size ; fig. 6, right valve of another individual.—XIII^ coal measures, at several places in Indiana. (Note.—Probably the same as Swallow's Pecten Iroadheadi^ upper coal measures of Missouri. No doubt the same as Geinitz's Pecten hawni from Nebraska. Found also in New Mexico, 100th Med. Geol. Survey, Collett.)—In Pennsylvania, in the Black fossilliferous limestone, 250' beneath the Pittsburgh coal, in Fayette Co., F. Piatt in report L, p. 35; J. J. Stevenson, KKK, p. 309. Also in Decker's Creek shale, under Mahoning sandstone, Morgantown, W. Ya., Stevenson, in L, p. 36. Also in Ferrif. L. Allegheny seiies, coal measures, Beaver Co. (Q. 62), Lawrence Co. (QQ, 47); Mercer Co. (QQQ, 25); and Butler Co. (V, 147).—X77/, XIV, Aviculopecten convexus. {Pecten convexus.) Hall, vm^^ page 264, figs. 119, 6. VIII g. Chemung formation. 3^^^p^ A species which cannot be mistaken by reason of its W~--^P unusual fatness or convexity, and the height of its H9^fflPv \^Q^^ above the hinge line.— VIIIg. Aviculopecten dolabriformis. {Pecten dolahriformis ) Hall, page 264, figs. 119, 4.— VIII g. Chemung formation. It resembles Aviculopecten convexus ; but its beak is closer to its hinge, its ears difi'erenTly %j proportioned, hind ear very sharp, and the whole shell more lopsided (oblique) and much flatter. Aviculopecten duplicatus. {Pecten duplicatus.) Hall, page 264, figs. 119, 2. VIIIg. Chemung formation. This species difi'ers from all the other Chemung Aviculopectens in its extraordinary breadth, and the doubling of its radiating ribs towards the margin. These ribs are plain towards the beak, and cut
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