DIC.] 



ECH1NODERMA TA. 



239 



polydactylus, Shumard, 1857, (Honio- 

 crinus polj-dactylus,) Trans. St. Louis 

 Acad. Sci., vol. 1, p. 78, and Ohio Pal., 

 vol. 1, p. 22, Hnd. Riv. Gr. 

 pos-ti< us, Hall, 1872, (Poteriocrinus posti- 

 cus,) 24th Rep. N. Y. St. Mus. Nat. 

 Hist., p. 209, and Ohio Pal., vol. 1, p. 

 22, Hud. Riv. Gr. 



proboscidiatus, Billings, 1857, Rep. of 

 Progr. Can. Geo. Sur., p. 207, and Can. 

 Org. Rem., Decade 4, p. 38, Tren- 

 ton Gr. 



retractilis, Walcott, 1883, 35th Rep. N. Y. 

 St. Mus. Nat. Hibt., p. 211, Tren- 

 ton Gr. 



rusticus, Billings, 1857, Rep. of Prog. Geo. 

 Sur. Can., p. 270, and Can. Org. Bern., 

 Decade 4, p. 41, Trenton Gr. 



similis, Billings, 1857, Kep. of Progr. Geo. 

 Sur. Can., p. 267, and Can. Org. Rem., 

 Decade 4, p. 40, Trenton Gr. 



tener, Billings, 1866, Catal. Sil. Foss. 



Autic., p. 9, Hud. Riv. Gr. 

 DICHOCRINUS, Munster, 1839, Beitrag. Zur. 

 Petref., vol. 1, p. 2. [Ety. dicha, in 

 two parts; kriwsn, lily*] Calyx deep, 

 cup shaped ; plates delicate ; basals 2 ; 

 primary radials 5, large, resting two 

 upon each basal, and the other in a 

 notch at one end of the basal suture, 

 opposite which there is a large azygous 

 plate in line with the first radials; suc- 

 ceeding radials 1 to 3, in each ray, the 

 last supporting arms ; arms 10, long, 

 bifurcating and bearing stout pinnules; 

 interradials 4 or 5, small, situate 

 above the first radials; vault slightly 

 elevated, with a small opening upon 

 the azygous side; column round. Type 

 D. radiatus. 



angustus. White, 1862, Proc. Bost, Soc. 

 Nat. Hist., vol. 9, p. 19, Burling- 

 ton Gr. 



chesterensis, see Pterotocrinus chesterensis. 



constrict us, Meek & AVorthen, 1860, 

 Proc. Acad. Nat. Sd. Phil., p. 381, and 

 Geo. Sur. 111., vol. 2, p. 263, War- 

 saw Gr. 



con us, Meek & Worthen, 1860, Proc. 

 Acad. Nat. Sci. Phil., p. 381, and Geo. 

 Sur. 111., vol. 2, p. 169, Burlington Gr. 



cornigerus, see Talarocrinus cornigerus. 



coxanus, Worthen, 1882, Bull. No. 1, 111. 

 St. Mus. Nat. Hist., p. 35, and Geo. Sur. 

 111., vol. 7, p. 313, Keokuk Gr. 



crassitestus, White, 1862, Proc. Bost. Soc. 

 Nat. Hist., vol. 9, p. 19, Burlington Gr. 



crassus, see Pterotocrinus crassus. 



dichotomus, Hall, 1860, Supp. to Geo. 

 Sur. Iowa, p. 85, Warsaw Gr. 



elegans, Casseday & Lyon, see Talarocrinus 

 elegans. 



expansus, Meek & Worthen, 1868. The 

 name was preoccupied by DeKoninck 

 & LeHon, but the name is probably a 

 synonym for D. polydactvlus. 



ficus, Casseday & Lyon, 1860, Proc. Am. 

 Acad. Arts and Sci., vol. 5, p. 24, and 

 Geo. Sur. 111., vol. 5, p. 502, Keokuk Gr. 



inornatus, Wachsmuth & Springer, (in 



press,) Geo. Sur. III., 



vol. 8, p. 190, Waverly 



or Kindertiook Gr. 

 hamiltonensis, Worthen, 



18S2. Bull. No. 'I, 111. 



St. Mus. Nat. Hist., p. 



35, and G'O. Sur. 111., 



vol. 7, p. 313, Keokuk 



Gr. 

 laclirymosus, Hall, 1860, 



Supp. to Geo. Sur. 



Iowa, p. 84, Burlington 



Gr. Wachsmuth says 



it is a syn. for Platy- 



crinus subsp ! nul<>sus. 

 Isevis, Hall, 1860, Supp. 



Geo. Sur. Iowa, p. 83, 



Burlington Gr. 

 lineatus, Meek & Worth- Flo 2 85. Dicho- 



en, 1869, Proc. Acad. crinus inornatus. 



Nat. Sci. Phil., p. 69, 



and Geo. Sur. 111., vol. 5, p. 440, Burl- 

 ington Gr. 

 liratus, Hall, 1861, Desc. New Crinoidea, 



p. 5, and Jour. Bost. Nat. Hist., vol. 7, 



p. 290, Burlington Gr. 

 ornatus, Wachsmuth & Springer, 1881, 



Proc. Acad. Nat. Sci. Phil, and Revis. 



Palseocrin., p. 84, Keokuk. Gr. This 



name was proposed instead of D. sculp- 



tus, Casseday & Lyon, because the latter 



was preoccupied, 

 ovatus, Owen & Shumard, 1850, Jour. 



Acad. Nat. Sci., 2d ser., vol. 2, p. 61, 



and Geo. Sur. Iowa, Wis., and Minn., p. 



590, Burlington Gr. 

 pisnm, Meek" & Worthen, 1869, Proc. 



Acad. Nat. Sci. Phil., p. 69, and Geo. 



Sur. 111., vol. 5, p. 441, Burlington Gr. 

 plicatus, Hall, 1861, Desc. New Crinoidea, 



p. 4, and Jour. Bost. Soc. Nat. Hist., 



vol. 7, p. 288, Burlington Gr. 

 pocillum, Hall, 1861, Desc. New Crinoidea, 



p. 5, and Jour. Bost. Soc. Nat. Hist., 



vol. 7, p. 291, Burlington Gr. 

 polydactylus, Casseday & Lyou, 1860, 



Proc. Am. Acad. Arts and Sci., vol. 5, 



p. 20, Keokuk Gr. 

 protubrraw, Hall, see Pterotocrinus pro- 



tuberans. 

 scitulus, Hall, 1861, Desc. New Crinoidea, 



p. 4, and Jour. Bost. Soc. Nat. Hist., 



vol. 7, p. 289, Burlington Gr. 

 sculptus, Casseday & Lyon, 1860, Proc. 



Am. Acad. Arts and Sci., vol. 5, p. 25. 



The name was preoccupied by DeKo- 

 ninck & LeHon in 1853. See D. or- 

 natus. 



sexlobatus, see Talarocrinus sexlobatus. 

 simplex, Shumard, 1857, Trans. St. Louis 



Acad. Sci., p. 74, and Geo. Sur. Iowa, 



p. 654, Warsaw Gr. 

 striatus, Owen & Shumard, 1850, Jour. 



Acad. Nat, Sci., 2d ser., vol. 2, and Geo. 



Sur. Iowa, Wis., and Minn., p. 590, 



BurlingtontOr. 

 symmeiricus, see Talarocrinus symmet- 



ricus. 



