. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. margin; marginal notch in pedicle (lower) valve; and concentric striee. Fonnd in the ^ „ „ ,. ^ , ^ ^ ,, . , ,. , Fig. 85. Schizobolus truncatus. Interiors of perncie ana black Naples shales, !irachial valves, showing median septum flankt-a by ,;iillosity i ' m each; exterior of pedicle valve, x S-.;, iipiicr Moscow r. J- Sfninvpon T*oillt* (t'"aiisition) shales; eighteen Mile Creek. ^Original.) in the npper Moscow shales (transition beds) and down to fonr feet from the top, at Sections 1, 2, 3, 4; and in the
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. margin; marginal notch in pedicle (lower) valve; and concentric striee. Fonnd in the ^ „ „ ,. ^ , ^ ^ ,, . , ,. , Fig. 85. Schizobolus truncatus. Interiors of perncie ana black Naples shales, !irachial valves, showing median septum flankt-a by ,;iillosity i ' m each; exterior of pedicle valve, x S-.;, iipiicr Moscow r. J- Sfninvpon T*oillt* (t'"aiisition) shales; eighteen Mile Creek. ^Original.) in the npper Moscow shales (transition beds) and down to fonr feet from the top, at Sections 1, 2, 3, 4; and in the Orbiculoidea niedhi bed of the middle Moscow shale, at Sec- tions 4 and 5. Measurements.—Length mm.; width mm. average. Genus CRANIA. Retzius. [Ett. : Kranion, iijiper i)art of a skull.] (1781: Scliriften der Berliner Gesellschaft Naturforscliender Freunde. Bd. II., p. 72. 1892: Pal. X. Y., A"ol. VIII., Pt. I., p. 145.) Shell with valves nnecpiid. not articnlated, and without perforation for the pedicle: attached by the apex or the entire surface of the lower valve; lower (attached) valve with apex slightly elevated if not conforming to snrface to which it is attached; npper valve conical, with apex near the center; often strongly marked mnscnlar im[)res- sions. Crania ckenistkiata. Hall. (Fig. 86.) Pal. N. Y., Vol. rV., p. 28, PL III.) Distinguishing Characters.— Nearly circular 5;^ outline; low conical form; smooth apex; shjirp, elevated and crennlated stritTS, which radiate from the apex, and are increased in number by the appearance of new ones between the diverging older ones. Found in the "Hamilton grouii, in Eight- ai ami top views of an *=" 1 '^ elliptical dorsal een Mile ; (Hall, type.) The shell is vaive(fromHaii). attached to Cystiplndlum in the Demissa bed, at Sec- tion 5. '^ Fig. 86. Crania crcnistriata. Later-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for r
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