Fig. 15
From: Balanocrinus and other crinoids from Late Jurassic mudstones of France and Switzerland
Tetracrinus galei n. sp., Early Oxfordian, Andelot-Morval. Basal elements (fused basal circlets). a Element with wide depression below radial cavity, M11399, a1 distal (upper) facet, a2 proximal (lower) facet (to column). b Element with narrow depression below radial cavity, M11400, b1 distal (upper) facet, b2 proximal (lower) facet, note two pits of Ooichnus paraboloides Bromley at lower right. c Oblique lateral view of strongly granular spherical columnal, M11401. d Lateral view of columnal with collar of irregular, tesselated elements, M11402. e Lateral view of higher columnal with tesselated sculpturing, paratype, M11403. f Facet of low columnal with tesselated sculpturing, M11404. g Tetramerous facet of smooth, low columnal, M11405. h Tetramerous facet of slightly granular, nearly spherical columnal, M11406. i Facet of higher columnal with median band of irregular, tesselated to rugose sculpturing, M11407. j High, smooth to weakly granular columnal, M11408, j1 lateral, j2 upper, tetramerous facet. k Pluricolumnal of two barrel-shaped columnals with ribbons of granules, M11409. l Pluricolumnal of two with swollen and tesselated median part, M11410. m Pluricolumnal of two with serpulid overgrowth, the tessellated sheet of the upper columnal is partly broken away exposing a thin, smooth column core; M11415. n Pluricolumnal of two cylindrical columnals with small, protruding smooth part, presumably the core for accretion of a mantle as in specimen m; M11411