. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 220 Found in the lower Moscow shale (?); Stictopora and DemisBa beds, at Section 5 (common); four to five feet below the Encrinal limestone, at Section (> (very rare); nine to twelve feet below the Encrinal limestone, at Section 7 (very rare); shale below the Trilobite beds, in Avery's Creek (rare); Pleurodictyum beds and Calcareous bed above them, in Avery's Creek (rare). Cyrtina hamiltonensis, var. recta. Hall. (Fig. 130.) ( Vol. p. 270, PI. XLIX.) Distinguishing Cha
. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 220 Found in the lower Moscow shale (?); Stictopora and DemisBa beds, at Section 5 (common); four to five feet below the Encrinal limestone, at Section (> (very rare); nine to twelve feet below the Encrinal limestone, at Section 7 (very rare); shale below the Trilobite beds, in Avery's Creek (rare); Pleurodictyum beds and Calcareous bed above them, in Avery's Creek (rare). Cyrtina hamiltonensis, var. recta. Hall. (Fig. 130.) ( Vol. p. 270, PI. XLIX.) Distinguishing Char- acters.— Plane flat ^ area; angular plica- Fio. 130. Cyrtina hamiltonensis, var. recta. Dorsal, tioilS ; beak IlOt ill- ventral, and cardinal views (from Hall). curved. Found in the upper Pleurodictyum bed (rare). Genus PARAZYGA. Hall and Clarke. [Ety. : Para, beside; zygos, yoke.] (1893: Pal. N. Y., Vol. VIII, Pt. II., p. 127.) Shells transverse, biconvex; valves nearly equal, with median fold and sinus. Umbo of pedicle valve closely in- curved. No hinge area. Surface covered with numerous fine, rounded, simple ribs, extending alike over median fold and sinus, and bearing short hair-like spines, which are commonly broken off, leaving only their bases. Brachidium a s| Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Buffalo Society of Natural Sciences. Buffalo, N. Y. : The Society
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