. The Devonian crinoids of the State of New York. Crinoidea, Fossil; Paleontology; Paleontology. DEVONIAN CRINOIDS OF NEW YORK 445 forms placed in this genus. Species quite similar to A. scutelli- f ormis, but more flattened, less concavo-convex and the point of attachment for the column large and circular and deeply sunk into the base. Margin of base very irregular, and may be best described as extended into irregular lobes or processes. Horizon and locality. From the Onondaga limestone, Limerock, Genesee county, N. Y. Types. Holotype in the New York State Museum. Remarks. See Remarks under A
. The Devonian crinoids of the State of New York. Crinoidea, Fossil; Paleontology; Paleontology. DEVONIAN CRINOIDS OF NEW YORK 445 forms placed in this genus. Species quite similar to A. scutelli- f ormis, but more flattened, less concavo-convex and the point of attachment for the column large and circular and deeply sunk into the base. Margin of base very irregular, and may be best described as extended into irregular lobes or processes. Horizon and locality. From the Onondaga limestone, Limerock, Genesee county, N. Y. Types. Holotype in the New York State Museum. Remarks. See Remarks under Aspidocrinus scutelli- f or mi s . Family edriocrinidae S. A. Miller (Talbot) Genus EDRIOCRINUS Hall 1859 (em. Springer 1920) The genus Edriocrinus has recently been revised by Springer (1920, pp. 443-448) in connection with the Crinoidea Flexibilia. Through his courtesy I have had, for reference, the proof sheets covering this genus and a photographic reproduction, natural size, of his Plate 76, some of the figures from which are reproduced here in text figures 61-63. Springer describes nine species (pocilliformis, occiden- talis, explicatus, dispansus, sacculus, becraftensis , adhae- rans, pyriformis, holopoides), four new ones in addition to the five previously a B described; and shows by unquestionable evi- Fisure 6l Bases of Edriocrinus showing the four basals. A, E . o c - dence in four of them (oCCidentalis, ci den talis Springer, ventral view, explicatUS, dispanSUS, holo- * 2; ^' E" exPlicatus Springer, x r dorsal view, x 3/2. (After Springer p o i d e s) that Edriocrinus is a mono- 1920; see text figures 62 and 63). cyclic crinoid with four basals, as in Melocrinus and associated genera (see text figures 61-63). His generic description is as follows: Crinoids without stem; either permanently attached directly by the base, or free in the adult stage. Monocyclic; basals four, fused into a more or less hollow mass (hereinafter simply called the base) with sutures usua
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaleont, bookyear1923
