. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 179 Found incrusting' braehio- pods, ill tlie shale four feet below the lowest Trilo- bite bed, in Avery's Ravine (rare). Hederella fi LI for mis. (Billings.) (Fig. 77A.) (Au- loponi filiformit-f. Billings, Can. Jonrii., Vol. IV., p. 119. Pal. N. Y., Vol. 1). 278, PI. LXV.) Distinguishing Characters. — Parasitic procniiibent habit; attached for its entire length; elongate snb-cjlin- drical primary axis, with lat- eral simple tubular cells, and occasionally tubular branches; sinuous or tortuous ^ character of
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 179 Found incrusting' braehio- pods, ill tlie shale four feet below the lowest Trilo- bite bed, in Avery's Ravine (rare). Hederella fi LI for mis. (Billings.) (Fig. 77A.) (Au- loponi filiformit-f. Billings, Can. Jonrii., Vol. IV., p. 119. Pal. N. Y., Vol. 1). 278, PI. LXV.) Distinguishing Characters. — Parasitic procniiibent habit; attached for its entire length; elongate snb-cjlin- drical primary axis, with lat- eral simple tubular cells, and occasionally tubular branches; sinuous or tortuous ^ character of cells, with apei-tures abruptly ^ turned outwards; cell tul)es of greater diameter and less length than H. cana- densis. Found incrusting shells and corals in the Hamilton group of Eighteen Mile Creek. (Coll. Am. Mus. Nat. Hist. New York.). Fig. 77. HedcrcHa ;iis. A frond natural .size, ami a portion enlarged, x 12 (after Hall and Simpson). Fig 77 a. Hederella Natural size and eiilai-^ed, x 6 ( after Hall and Simpson). Class Brachiopoda. Cuvier. The Brachiopoda are marine animals, sparingly represented in the modern seas, but most prolitically developed in the Palaeozoic and early Mesozoic waters. The soft parts are enclosed in a bivalve shell, for which reason they are often, though erroneously, classed with the Mol- lusca, their true affinities being decidedly with the worms and Polyzoa. The valves of the brachiopod shell are dorsal and ventral, and not right and left as in the lamellibranch Mollusca ; they are unequal, and each one is symmetrical with reference to a median line (longitudinal axis) drawn through its apex. The larger valve (in most species) has its beak variously truncated, or furuisiied with an opening or foramen, for the. 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
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