. Bulletins of American paleontology. Early Silurian Crinoids from New York: Eckert and Brett 21. Text-figure 4.—Callistocrinus tesselatiis n. gen. and plate di- agram of holotype BMS E26335 in lateral view. Arrow indicates arin dividing immediately above cup. Radials black, interbrachials stippled. Scale is 1 mm tiful (refers to the appearance of the type specimen) + krinon (Gr.) = hly. Callistocrinus tesselatus, new species Plate 5, figures 2, 10: Text-figure 4 Diagnosis.—As for the genus. Cup plates smooth, unornamented Description.—Cup obconical, height equal to width, interrays infla
. Bulletins of American paleontology. Early Silurian Crinoids from New York: Eckert and Brett 21. Text-figure 4.—Callistocrinus tesselatiis n. gen. and plate di- agram of holotype BMS E26335 in lateral view. Arrow indicates arin dividing immediately above cup. Radials black, interbrachials stippled. Scale is 1 mm tiful (refers to the appearance of the type specimen) + krinon (Gr.) = hly. Callistocrinus tesselatus, new species Plate 5, figures 2, 10: Text-figure 4 Diagnosis.—As for the genus. Cup plates smooth, unornamented Description.—Cup obconical, height equal to width, interrays inflated, plates smooth, unornamented. CD interray not observable. Basal and radial circlets each comprising approximately 15% of cup height. Ob- served basals hexagonal, higher than wide (h/w = ). Observed radials pentagonal, slightly wider than high (h/w = ), separated from each other by basals and proximal primibrachials. Each first primibrachial hexagonal, wider than high (h/w = ), succeed- ed by heptagonal, axillary second primibrachial (h/w = ). Secundibrachials two in each half-ray, ter- tibrachials two in each inner (adaxial) quarter-ray and three in each outer quarter-ray. One entire interprimi- brachial interray observed, consisting of a hexagonal (interradial) plate (h/w = ) succeeded by one tier of two plates, two tiers of three plates each, and a narrow row of several additional interbrachials con- nected to tegmen. Intersecundibrachial interrays each consisting of a heptagonal or octagonal proximal in- tersecundibrachial, a tier of two plates, and several ad- ditional plates. Intertertibrachials indistinct, apparently at least two plates incorporated into each interray. Arms thirty, six per ray, three in each half-ray, uni- serial, pinnulate. Arms typically atomous; one arm di- viding isotomously immediately above cup on second quartibrachial and lower portions of other arms bear- ing stout pinnules apparently representing incipient di-
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