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BATOCRINID 2. ATS 
Dizygocrinus indianensis (Lyon and Cass.). 
Plate XXXII. Figs. 6a, 6, and Plate XXXV., Fig. &. 
1860. <Actinocrinus indianensis — Lyon and Cass. ; Amer. Journ. Sci., Vol. XXIX., p. 75. 
1873. <Actinocrinus indianensis —MxxEK and WortHEN; Geol. Rep. Illinois, Vol. V., p. 341. 
1881. Batocrinus indianensis— W. and Sp.; Revision Paleocr., Part IT., p. 166. 
1884, Batocrinus indianensis—QuENstEDT ; Handb. der Petrefactenkunde, Plate 77, Figs. 6a, 0. 
Calyx below medium size, biturbinate to subglobose, about as wide as 
high ; the dorsal cup a little higher than the ventral disk. The sides of the 
cup slightly convex, expanding almost uniformly from the base to the arm 
regions ; the rays well defined by undulated angular ridges following the 
median portions of the plates. In addition to these ridges, the surface 
of all radial as well as interradial plates is covered by a variety of promi- 
nences and depressions, which give to the ornamentation a hieroglyphic 
appearance. 
Basals short, slightly projecting, hexagonal in outline; imterbasal suture 
lines impressed. Radials twice as wide as long, covered with three stellate 
prominences, which, being confluent, form a transverse ridge. First costals 
quadrangular, shorter and narrower than the radials, the sides convex, the 
median ridge crossed either by a transverse node, or by a row of small tuber- 
cles transversely arranged. Second costals generally heptagonal and a little 
wider than the first, their median portions raised into small tubercles. 
Distichals rather large, nearly as long as wide; they consist in the an- 
terior ray of 4 X 2 plates, in the four others of 2 X 2, which are followed 
by 8X 2 fixed palmars. Arms thirty-six (exceptionally forty), two from 
each arm opening; long, slightly flattened and infolding at their tips; they 
are biserial from their bases up, and the plates connected vertically by wav- 
ing sutures, The upper border of each arm plate is covered by two or more 
small tubercles, which project over the lower end of the succeeding plate, 
giving to the surface a file-like appearance. Pinnules long, cylindrical, com- 
posed of about thirteen elongate joints. Interbrachials: 1, 2, 1, and one or 
two additional pieces between the arm bases. ‘The first plate is considerably 
larger than the others, wider than high; it is covered by a central, irregu- 
larly stellate node, surrounded by numerous small granules; the upper plates 
‘elongate and similarly ornamented. Anal plate a little narrower than the 
radials; followed by 3, 3, 2, and 2 pieces, which interlock with the inter- 
ambulacral plates above. Ventral disk depressed conical; the plates small 
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