220 



ECHINODERMA TA. 



[AGA. 



spinotentaculus, Hall, 1860, Supp. Geo. 



Rep. Iowa, p. 86, Burlington Gr. 

 spinulosus, see Dorycrinus spiuulosus. 

 steropes, see Batocrinus steropes. 

 subaeuleatus, see Dorycrinus subaculeatus, 

 subsequalis, see Batocrinus subsequalis. 

 gubturbinatuLS, see Dorycrinus subturbi- 



natus. 

 subumbrosus, Hall, syn. for Teleiocrinus 



liratus. 

 subventricosus, see Physetocrinus subven- 



tricosus. 



superlatus, see Megistocrinus 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. 

 tricorniy, see Dorycrinus tricornis. 

 Irinodux, see Dorycrinus trinodus. 

 turbinatus, see Batocrinus turbinatus. 

 turbinatus var. elegans, see Batocrinus tur- 

 binatus var. elegans. 

 umbrosus, see Teleiocrinus umbrosus. 

 unicarinatus, Hall, 1860, Supp. to Geo. 



Sur. Iowa, p. 48, Keokuk Gr. 

 unicornis, see Dorycrinus unicornis. 

 unispinus, see Dorycrinus unispinus. 

 urna, Troost, 1850* Not defined. 

 urniformis, McChesney, 1860, New Pal. 



Foss., p. 23, syn. for Eretmocrinus 



konincki. 

 validm, Meek & Worthen, 1860, syn. for 



Steganocrinus concinnus. 

 ventricosus, see Physetocrinus ventricosus. 

 ventricosus var. cancellatus, see Physetocri- 

 nus ventricosus var. cancellatus. 

 ventricosus var. internodtis, see Physetocri- 

 nus ventricosus var. internodus. 

 verneuili, see Melocrinus verneuili. 

 verneuilianw, see Eretmocrinus verneu- 



ilanus. 

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



578, Burlington Gr. 

 viaticus, White, 18J4, Rep. Invert. Foss., 



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



vol. 4, p. 82, Subcarboniferous. 

 viminalis, see Amphoracrinus viminalis. 

 wachsrnuthi, White, 1862, Proc. Boat. Soc. 



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



scitulus. 

 wachsmuthi, White, 1880, see Batocrinus 



wachsmuthi. 



whitfteldi, see Saccocrinus whitfieldi. 

 whitii, see Megistocrinus whitii. 

 yandelli, see Batocrinus 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. americanus. 



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. Wachsmuth says 

 it is a syn. for A. americanus. 



convexus, Hall, 1860, (A. pentagonus var. 

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

 58, Burlington Gr. 



Flo. 236. Agaricocrinus crassus, azygous view of 

 calyx. 



corrugatus, Hall, 1861, Desc. New Spec. 



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



283, Burlington Gr. Wachsmuth says 



it is a syn. for A. pyramidatus founded 



upon a mature 



specimen, 

 crassus, Wether- 



by, 1881, Jour. 



Cin. Soc. Nat. 



Hist., vol. 4, p. 



178, Keokuk 

 Gr. 



elegans, Wether- 

 by, 1881, Jour. 

 Cin. Soc. Nat. 

 Hist., vol. 4, p. 



179, Keokuk 



Gr 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, 



