220 



ECHJNODERMA TA. 





spinotentaculus, Hall, 1860, Supp. Geo. 



Rep. Iowa, p. 86, Burlington Gr. 

 spimdosus, see Dorycrinus spinulosus. 

 steropes, see Batocrinus steropee. 

 subaculeatus, see Dorycrinus subaculeatus, 

 subsequalis, see Batocrinus subsequalis. 

 subturbinatus, see Dorycrinus subturbi- 



natus. 

 suburnbrosus, Hall, syn. for Teleiocrinus 



liratus. 

 xubventrico8m, see Physetocrinus subven- 



tricosus. 

 superlalus, see Megi9tocrinus superlatus. 

 symmetricus, see Dorycrinus symmetricus. 

 tenuidiscus, Hall, 1861, Desc. New Crin- 



oidea, p. 14, Burlington Gr. 

 tenuiradiatus, Hall, 1847, see Palaeocystites 



tenuiradiatus. 

 tenuiradiatw, Hall, 1861, see Teleiocrinus 



tenuiradiatus. 

 tenuisculptus, McChesney, 1860, Desc. 



New Pal. Foss., p. 15, and Trans. Chi. 



Acad. Sci., pi. 5, fig. 11, Burlington Gr. 

 thalia, Hall, 1861, Desc. New Crinoidea, 



p. 13, Burlington Gr. 

 themis, Hall, 1861, Desc. New Crinoidea, 



p. 11, Burlington Gr. 

 thetis, Hall, 1861, Desc. New Crinoidea, 



p. 11, Burlington Gr. 

 thoas, Hall, syn. for A. reticulatus. 

 tholus, syn. for A. glans. 

 tricornix, see Dorycrinus tricornis. 

 trinodus, see Dorycrinus tri nodus. 

 tiirhinatus, see Batocrinus turbinates. 

 turbinatus var. elegans, see Batocrinus tur- 



btnatus var. elegans. 

 umbrosus, see Teleiocrinus umbrosus. 

 unh-arinatus, Hall, 1860, Supp. to Geo. 



Sur. Iowa, p. 48, Keokuk <ir. 

 unicornis, see Dorycrinus unicornis. 

 tmupinw, see Dorycrinus unispinus. 

 who, Troost, 1850* Not defined. 

 urniformits, McChesney, 1860, New Pal. 



Foss., p. 23, syn. for Eretmocrinus 



kouincki. 

 validtis, Meek & Worthen, 1860, syn. for 



Steganocrinus concinnus. 

 ventricosus, see Physetocrinus ventricosus. 

 ventricosus var. cancellatus, see Physetocri- 

 nus ventricosus var. cancellatus. 

 ventricosus var. internodus, see Physetocri- 

 nus ventricosus var. internodus. 

 verneicUi, see Melocrinus verneuili. 

 verneuilianus, see Eretmocrinus verneu- 



ilanus. 

 verrucosus, Hall, 1858, Geo. Rep. Iowa, p. 



578, Burlington Gr. 

 viaticus, White, 1874, Rep. Invert. Foss., 



p. 16, and Geo. Sur. W. 100th Merid., 



vol. 4, p. 82, Subcarboniferous. 

 viminalis, see Amphoracrinus viminalis. 

 wachsmuthi, White, 1862, Proc. Boat. Soc. 



Nat. Hist., vol. 9, p. 17, syn. for A. 



scitulus. 

 wachsmuthi, White, 1880, see Batocrinus 



wachsmuthi. 

 whitfieldi, see Saccocrinus whitfieldi. 

 whitii, see Megistocrinus whitii. 

 yandelli, see Batoor'nus yandelli. 



Agaricocrinus, Troost, 1850, Catal. in Proc. 

 Am. Ass'n.and Hall in Geo. Sur. Iowa, 

 p. 560. [Ety. Agaricus, mushroom ; 

 Krinon, lily.] The form of the calyx is 

 that of an inverted basin or mushroom ; 

 plates smooth ; dome composed of large 

 nodose plates and smaller convex ones, 

 the central plate being the largest in 

 the body; basals 3, small; primary 

 radials 3x5; secondary radials 1 or 

 2x10, which are succeeded by shorter 

 arm-plates; regular interradials 3 ; azy- 

 gous plates 4 to 7, or more ; aperture, at 

 the upper part, directed laterally ; arms 

 long, constructed of two rows of plates 

 bearing pinnule; columns round. Type 

 A. a 1 1 ie ri can i is. 



americanus, Roemer, 1854, (Amphoracri- 

 nus americanus,) Bronn's Leth. Geog., 

 vol. 2, p. 250, and Geo. Sur. Iowa, p. 

 617, Keokuk Gr. 



bellitrema, Hall, 1861, Bost. Jour. Nat. 

 Hist., p. 281, Burlington Gr. Wachs- 

 muth says it is a syn. for A. ornotrema. 



brevis, Hall, 1858, (Actinocrinus brevis,) 

 Geo. Sur. Iowa, p. 567, Burlington Gr. 



bullatus, Hall, 1858, Geo. Sur. Iowa, p. 

 562, Burlington Gr. Wacbsmuth says 

 it is a syn. for A. americanus. 



»'>nvexus, Hall, 1860, (A. pentagonus var. 

 convexus,) Supp. to Geo, Sur. Iowa, p. 

 58, Burlington Gr. 



.'■'M.~ ARnricocrimis crassus, wygooa view ol 

 calyx. 



corrugatus, Hall, 1861, Desc. New Spec 



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



283, Burlington (ir. Wachsmuth says 



it is a syn. Tor A. pyramidatus founded 



upon a mature 



specimen, 

 craesus, Wether- 



by, 1881, Jour. 



Cin. Soc. Nat. 



Hist., vol. 4, p. 



178, Keokuk 

 (ir. 



elegans, Wether- 

 by, 1881, Jour. 

 Cin. Soc. Nat. 

 Hist., vol. 4, p. 



179, Keokuk ^~ 



< Jr FiG- 237.— Agaricocrinus el- 



eris, Hall, 1864, egans, view of the vault. 

 (Actinocrinus helice var eris,) 17th 

 Rep. N. Y. St. Mus. Nat. Hist., p. 53, 



