BATOCRINID&. 369 
Batocrinus irregularis Cassrpay. 
Plate XX VII. Figs. 4a, b, and e. 
1854. Cassepay; Deutsche Geol. Gesellsch., Band VI., p. 240, Plate 2, Figs. 2a, b, ¢. 
1867. Mesx and Wortuen; Geol. Rep. Illinois, Vol. V., p. 367. 
1881. W. and Sp.; Revision Paleocr., Part II., p. 166. . 
1892. S.A. Minter; Adv. Sheets 18th Rep. Geol. Surv. Indiana, p. 26, Plate 4, Figs. 6-9. 
Resembling the preceding species, but readily distinguished by its smaller 
size, more elongate form, much greater depth of dorsal cup, by having a less 
number of arms, and the absence of spiniferous plates in the tezmen. Sur- 
face of plates smooth or slightly wrinkled, the radial ones transversely 
ridged ; suture lines distinct. 
Basal cup projecting, circular in outline, deeply excavated for the attach- 
ment of the column. Radials short, considerably wider than the costals. 
Costals small, quadrangular, twice as wide as long ; succeeded in four of the 
rays by 2X 2 distichals, which resemble the costals in form and size, and 
support 2 X 2 X 2 fixed palmars. In the anterior ray there are two rows of 
three successive distichals followed by the free arms. Arms eighteen, the 
ambulacral openings directed horizontally. Interbrachial plates three; the 
first larger, supporting two plates in the second range. The anal piece is 
succeeded by three plates, and one above. Tegmen high-conical, higher 
than the dorsal cup; composed of comparatively few, large, tumid plates. 
Anal tube stout, almost central; constructed of strongly nodose pieces. 
Arms and column unknown. 
Horizon and Locality. —Same as last. 
Batocrinus subzequalis (McCuzsyey). 
Plate XX VITL, Figs. 7a, b; Sa, b, and 9. 
1860. Actinocrinus subequalis — McCuesxey, Descr. Pal. Foss., p. 17. 
1870. Actinocrinus subequalis — McCuusney; Chicago Acad. Nat. Sci., p. 18, Plate 5, Fig. 7. 
1873. Batocrinus subequalis —Munx and WortHey; Geol. Rep. Lllinois, Vol. V., p. 367. 
1881. Batocrinus subequalis —W. and Sp.; (Syn. of Batocrinus discoideus), Revision Paleocr., Part II., 
p. 166. 
Syn. Actinocrinus discoideus —Hatt; 1858, Geol. Rep. Iowa, Vol. I., Part II., p. 594. 
Syn. Batocrinus discoideus —Mernx and WortHEN; Geol. Rep. Illinois, Vol. V., p. 367, and Whit- 
field; Mem. Amer. Mus. Nat. Hist., 1893; Vol. L., p. 14, Plate 1, Figs. 19, 20. 
Syn. Actinocrinus formosus — Hat, 1860; Suppl. Geol. Rep. Iowa, p. 30. 
Syn. Batocrinus formosus — Mux and Wortuen; 1873; Geol. Rep. Illinois, Vol. V., p. 367. 
Syn. Batocrinus equabilis —8. A. Miniur, 1894; Geol. Surv. Missouri, Bull. 3, p. 25, Plate 5, Figs. 
13, 14, 15. 
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