. Annual report on the New York State Museum of Natural History. Science. 206 Twenty-fourth Report on the State Museum. Genus —GLYPTOCKINUS^ Ball Glyptocrinus I^ealli n. sp. Plate 5, figs. 18,19. Calyx turbinate, gradually spreading from the base to the free arms; deeply pentalobate below the third radial plates, from the depression of the interradial area; ten-lobed above from the depres- sion of the intersupraradial areas. Basal plates very small, presenting a low triangular face on the exterior, with very slightly truncated lateral angles. Subradial plates larger, heptagonal, with height an
. Annual report on the New York State Museum of Natural History. Science. 206 Twenty-fourth Report on the State Museum. Genus —GLYPTOCKINUS^ Ball Glyptocrinus I^ealli n. sp. Plate 5, figs. 18,19. Calyx turbinate, gradually spreading from the base to the free arms; deeply pentalobate below the third radial plates, from the depression of the interradial area; ten-lobed above from the depres- sion of the intersupraradial areas. Basal plates very small, presenting a low triangular face on the exterior, with very slightly truncated lateral angles. Subradial plates larger, heptagonal, with height and width about equal; the upper j,j^ J extremities truncated by the interradial and anal plates. Primary radial plates subequal in size, the first and third having a general pentangular form and the second quadrangular. Supraradial series consisting of fourteen to sixteen plates (sometimes less), large in the lower part, becoming gradually smaller above, the upper ones about five times as wide as high; ther lower larger plates attached to the calyx and dome by the intersupraradial and summit plates, while the upper smaller plates are Diagram of GiT/ptocrinm free and bear tentacula. Interradial and anal JVealh, showing the basal to^ether"wffh those?ft1fe P^^^^^ ^^^7 numerous; thosc of the middle range, SfurcationT/the'armS passing from the subradial plate upward, are SgemeSS^the'^piaTes largest; the plates between these and the ray are of the anal area. small, some of them minute. In the anal area the number of plates is from fifty to sixty; in the interradial series, from forty to fifty; and in the intersupraradial areas, twenty or more. Arms composed of a single series of very short plates, higher on one side than on the other, and bearing tentacula on the longest sides only : tentacula long and slender. Surface of radial plates marked by an elevated rounded ridge, which bifurcates on the first and third radials, the branches passing to the subradials and thence to the b
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Keywords: ., bookauthorne, bookcentury1800, bookdecade1870, booksubjectscience
