. The Devonian crinoids of the State of New York. Crinoidea, Fossil; Paleontology; Paleontology. DEVONIAN CRINOIDS OF NEW YORK 20'. Corocrinus ornatus sp. nov. Plate 26, figures 2, 3, 4; text figure 47 This species is represented by five fairly well-preserved thecae. Two of these have about 10 mm of stem attached, and portions of the arms. As the specimens are embedded in soft shale their preservation is excellent. Owing to the thinness of the plates and the delicacy of the cup, all the speci- mens are more or less crushed. Dorsal cup urn-shaped; base nar- row. The sides extend outward and Upw
. The Devonian crinoids of the State of New York. Crinoidea, Fossil; Paleontology; Paleontology. DEVONIAN CRINOIDS OF NEW YORK 20'. Corocrinus ornatus sp. nov. Plate 26, figures 2, 3, 4; text figure 47 This species is represented by five fairly well-preserved thecae. Two of these have about 10 mm of stem attached, and portions of the arms. As the specimens are embedded in soft shale their preservation is excellent. Owing to the thinness of the plates and the delicacy of the cup, all the speci- mens are more or less crushed. Dorsal cup urn-shaped; base nar- row. The sides extend outward and Upward at a low angle to the base of Figure 47 Analysis of calyx of Corocrinus the free arms, with a more or less pro- ornatus' the genotype, nounced outward curvature. One cup somewhat crushed has a height of 22 mm to the tops of the primaxils, and an estimated diameter of about 18 mm at the same level. Basals large and fused to three elements which together form a deep conical cup. Radials hexagonal, large, an average one having a height of about 7 mm and a maximum breadth of about 6 mm. First primibrach with a height of 6 mm and a breadth slightly less than the radial; variable in shape — hexagonal, heptagonal, octagonal. Primaxil slightly smaller than the first primibrach. First secundibrach incorporated and fairly large. Interradii narrow, with the exception of the posterior, which has about twice the breadth of any of the others. In one specimen examined, the posterior interradius measures about 18 mm in width at the level of the tops of the primaxils. Proximal anal heptagonal, large, being of practically the same size as the radials; three plates in the second range, the median plate being the smallest; in the third range five plates, and in the fourth five or six. Above this level the ranges not well aligned; plates small and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appear
Size: 1613px × 1549px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaleont, bookyear1923
