286 



ECHINODERMA TA. 



[TEC. — TRK. 



laivis, Billings, 1857, Geo. Sur. Can., p. 

 278, and Can. Org. Rem., Decade 4, p. 

 47, Trenton Gr. 

 lobatus, Hall, 1862, (Forbesocrinus loba- 

 tus,) 15th Rep. N. Y. St. Mus. Nat. 

 Hist., p. 124, Ham. Gr. 

 lobatus var. tardus, Hall, 1863, (Forbeso- 

 crinus lobatus var. tardus,) 17th Rep. 

 N. Y. St. Mus. Nat. Hist., p. 56 

 and Ohio Pal., vol. 2, p. 171, Wa- 

 verly Gr. 

 meeki, Hall, 1858, (Forbesocrinus meeki,) 



Geo. Sur. Iowa, p. 631, Keokuk Gr. 

 multibrachiatus, Lyon & Casseday, 1858, 

 (Forbesocrinus multibrachiatus,) Am. 

 Jour. Sci. and Arts, vol. 28, p. 235, 

 Keokuk Gr. 

 multibrachiatus var. colletti, White, 1881, 

 2d Ann. Rep. Bureau of Statistics of 

 Indiana, p. 506, Keokuk (ir. 



nuntius, Hall 

 1888, (Forbeso 

 criniis nun 

 tius, i LStfa Ben 

 N. Y. St. Mus 

 Nat. Hist., p 

 124, Ham Gr 

 rainuli)sus, Hall 

 1860, (Forbeso 

 crinus ramulo 

 mi.-, Supp 



Geo. Sur. Iowa 

 p. 67, Burling- 

 ton Gr. 

 robustus, Wachs- 

 rmith, (in 



press,) Geo. 

 Sur. 111., vol 8, 

 Kind erhook 

 Gr. 

 s e m i o v a t u s , 

 Meek & Worthen, 1860, (Forbesocrinus 

 semiovatus,) Proc. Acad. Nat. 8ci. Phil., 

 p. 389, and Geo. Sur. 111., vol. 2, p. 272, 

 St. Louis Gr. 

 shumardanus, Hall, 1858, (Forbesocrinus 

 shumardanus,) Geo. Sur. Iowa, p. 671, 

 St. Louis Gr. 

 thiemii, Hall, 1861, (Forbesocrinus 

 thiemii,) Desc. New Crin., p. 8, and 

 Geo. Sur. 111., vol. 5, p. 389, Burlington 



whitfieldi, Hall, 1858, (Forbesocrinus 

 whitfieldi,) Geo. Sur. Iowa, p. 632, 

 Kaskaskia Gr. 

 Tkchnocrincs, Hall, 1859, Pal. N. Y., vol. 

 3, p. 139. [Ety. ' techne, art; kriiion, 

 lily.] Basals 4, one larger than the 

 others; primary radials 3x5; second- 

 ary radials 1x10; tertiary rad ials 2 x 20 ; 

 interradials 3x5 ; arms simple, bearing 

 pinnules; column round. Type T. 

 andrewsi. 



andrewsi, Hall, 1859. Pal. N. Y., vol. 3, p. 

 141, Oriskany sandstone. 



sculptus, Hall, 1859, Pal. N. Y., vol. 3, p. 

 143, Oriskany sandstone. 



spinulosus, Hall, 1859, Pal. N. Y., vol 3, p. 

 140, Oriskany sandstone. 



Fig. 442. -Tnxocri nus 

 robustus. 



striatus, Hall, 1859, Pal. N. Y., vol. 3, p. 

 142, Oriskanv sandstone. 

 TKLEiocitiNiTS.Wachsmuth & Springer, 1881, 

 Proc. Acad. Nat. Sci. Phil., p. 320. 

 [Ety. teleios, perfect ; kri>. on, lily. J Dis- 

 tinguished from Strotocriuus, with 

 which it has generally been classed, by 

 having a long ventral tube, instead of 

 a simple opening through the vault. 

 Type T. umbrosus. 



segilops, Hall, 1860, (Actinocrinus segi- 

 lops,) Supp. to Geo. Sur. Iowa, p. 5, 

 Up. Burlington Gr. 



althea, Hall, 1861, (Actinocrinus althea,) 

 Desc. New Crin., p. 13, Up. Burling- 

 ton Gr. 



clivosus, Hall, 1861, (Actinocrinus clivo- 

 su8,) Bost. Jour. Nat. Hist., vol. 7, p. 

 274, Up. Burlington Gr. 



erodus, Hall, 1861, (Actinocrinus erodus,) 

 Desc. New Crin., p. 12, Up. Burling- 

 ton Gr. 



insculptus, Hall, 1861, (Actinocrinus in- 

 sculptii8,) Desc. New Crin., p. 12, Up. 

 i . Burlington Gr. 



liratus, Hall, 1860, (Actinocrinus liratus,) 

 Supp. to Geo. Sur. Iowa, p. 1, and 

 Geo. Sur. 111., vol. 5, p. :{r>5, Burling- 

 ton ( i r. 



rudi8, Hall, 1860, (Actinocrinus rudis,) 

 Supp. to Geo. Sur. Iowa, p. 33, Bur- 

 lington Gr. 



tenuiradiatus, Hall, 18(51, (Actinocrinus 

 tenuiradiatus,) Desc. New Crin., p. 12, 

 Burlington < ir. 



umbrosus, Hall, 1858, (Actinocrinus um- 

 brosus,) Geo. Sur. Iowa, p. 5!>0, Up. 

 Burlington Gr. 

 Tiiysanocrinus, Hall, 185L', Pal. N. Y., vol. 

 2, p. 188. [Ety. thyxanog, fringed ; kri- 

 non, lily.] Calyx small, suhglobose; 

 basals 5 ; subradials 5; primary radials 

 3x5;; secondary radials 2 or more 

 x 10 ; regular interradials 3; azygous 

 area wide, lower plates large, smaller 

 above ; arms composed of a double se- 

 ries of plates, with pinnules ; column 

 round. Type T. liliiformis. 



aculcatuH, Hall, 1852, Pal. N. Y., vol. 2, p. 

 190, Niagara Gr. 



canaliculars, Hall, 1862, Pal. N. Y., vol. 

 2, p. 189, Niagara Gr. 



immaturus, Hall, 1852, Pal. N. Y., vol. 2, 

 p. 191, Niagara Gr. 



liliiformis, Hall, 1852, Pal. N. Y., vol. 2, p. 

 188, Niagara Gr. 



iiiicrobasalis, see Archaeocrinus micro- 

 basalis. 



pyri/ormi.8, see Archseocrinus pyriformis. 

 Tbemataster, Worthen & Miller, 1883, Geo. 

 Sur. 111., vol. 7, p. 330. [Ety. trema, 

 opening ; aster, star.] Central part dis- 

 coid ; rays long, flexuous, a double 

 series of ambulacral plates, with taper- 

 ing ends directed toward the apices of 

 the rays, upon each side of which there 

 is a series of curved adambulacral 

 plates, which form the margin of the 

 rays ; pores large between the con- 



