30 BULLETIN 64, UNITED STATES NATIONAL MUSEUM. 



Supplementary description. — Basals three, unequal; radials five, 

 slightly longer than wide; first primibrachs quadrangular, about 

 twice as wide as long; second primibrachs represented by fragments 

 only, but apparently shorter than the first ; first interbrachials half as 

 large as the radials, nine sided; higher plates of the calyx not pre- 

 served. 



Observations. — This species differs from Coccocrinus bacca in its 

 larger size and in having the sides of the calyx more divergent and 

 less curved. 



Formation and locality. — Brownsport limestone. Decatur County, 

 Tennessee. 



Cat. No. 39933, U.S.N.M. 



Subfamily MAESIPOCRININiE Battier. 

 Genus M ARSIPOCRINUS Bather. 



Marsupiocrinus Phillips (not de Blainville 1830), in Murchison's Sil. System, 

 1839, p. 672.— Austin, Ann. Mag. Nat. Hist., X, 1842, p. 109; 1843, p. 198.— 

 Pictet, Traite de Pal., IV, 1857, p. 332.— Dujardin and Hupe, Hist. Nat. 

 Zo-oph., 1866, p. 149.— Angelin, Icon. Crin. Suec., 1878, p. 2. — Zittel, 

 Handb. d. Pal., 1879, p. 365. — Wachsmuth and Springer, Rev. Palseocri- 

 noidea, II, 1881, p. 62.— Miller, North Amer. Geol. and Pal., 1889, p. 260.— 

 Zittel, Text Book of Pal. (Eastman trans.), 1896, p. 139. — Wachsmuth and 

 Springer, North Amer. Crinoidea Camerata, 1897, p. 730. 



Cupellsecrinites Troost, Proc. Amer. Ass. Adv. Sci., II (read 1849), 1850, p. 61. 



Cupellsecrinus Shumard (not Steininger), Trans. Acad. Sci. St. Louis, II, No. 2, 

 1866, p. 380. 



Marsipocrinus Bather, Quart. Journ. Geol. Soc. London, XLV, 1889, p. 173; 

 A Treatise on Zool., Ill, Echinoderma, 1900, p. 156. 



The description by Troost is as follows: 



Pelvis [base] — pentagonal formed mostly of three pieces. 



Costals [radials] five, compressed hexagonal. Scapulars [primibrachs] five, of 

 various forms. 



Column — Cylindrical with circular or pentalobate alimentary canal [lumen]. 



MARSIPOCRINUS TENNESSEENSIS (Roemer). 



Plate 9, figs. 5, 6. 



Cupellxcrinites buchii Troost, Proc. Amer. Ass. Adv. Sci., II (read 1849), 1850, 



p. 61 (nomen nudum); MSS., 1850. 

 Cupellxcrinites laevis Troost, Proc. Amer. Ass. Adv. Sci., II (read 1849), 1850, 



p. 61 (nomen nudum); MSS., 1850. 

 Platycrinus tennesseensis Roemer, Sil. Fauna westl. Tenn., 1860, p. 35, pi. m, 



figs. 4a-e. 



Cupellsecrinus tennesseensis Shumard, Trans. Acad. Sci. St. Louis, II, No. 2, 1866, 



p. 362 (catalogue name). 

 Cupellsecrinus Ixvis Shumard, Trans. Acad. Sci. St. Louis, II, No. 2, 1866, p. 361 



(catalogue name). 



Marsupiocrinus tennesseensis Wachsmuth and Springer, Rev. Palseocrinoidea, II, 

 1881, p. 65 (catalogue name).— Miller, North Amer. Geol. and Pal., 1889, 

 p. 260, 



