AGA. AGE.] 



ECHINODERMA TA. 



221 



IG. 238. Agaricocriiius 

 elegans, basal view. 



and Ohio Pal., vol. 2, p. 164, Wa- 



verly Gr. 



exca vat us, Hall, 

 1861, (Actinocri- 

 nus excavatus,) 

 Desc. New Spec. 

 Grin., p. 3, and 

 Bost. Jour. Nat. 

 Hist., p. 282, Bur- 

 1 i n g t o n Gr. 

 Wachsmuth says 

 it is a syn. for A. 

 americanus. 

 fiscellus, Hall, 1861, 

 ( Actinocrin us fis- 

 cellus,) Desc. 



New Spec. Grin., p. 2, and Bost. Jour. 



Nat. Hist., p. 272, Burlington Gr. 

 geometricus, Hall, I860, Supp. to Geo. 



Sur. Iowa, p. 56, Burlington Gr. 

 gracilis, Meek & Worthen, 1861, Proc. 



Acad. Nat. Sci. Phil., p. 135, Burling- 



ton Gr. 

 helice, Hall, 1864, (Ac- 



tin ocrinus h el ice,) 



17th Rep. N. Y. St. 



Mus. Nat. Hist., p. 



53, and Ohio Pal., 



vol. 2, p. 163, Wa- 



verly Gr. 

 inflatus, Hall, 1861, 



Desc. New Criniodea, 



&. 4, and Bost. Jour. 

 at. Hist., p. 284, 

 Burlington Gr. 

 macadamsi, Worthen, 

 (in press,) Geo. Sur. 

 111., vol. 8, p. 94, 



K^nkiifc- Pr 



Keokuk trr crinus h 



nodosus, ;Meek & 



Worthen, 1869, Proc. Acad. Nat. Sci. 



Phil., p. 167, and Geo. Sur. 111., vol. 5, 



p. 387, Burlington Gr. Wachsmuth 



says it is a syn. for A. americanus. 

 nodulosus, Worthen, (in press,) Geo. Sur. 



111., vol. 8, p. 94, Keokuk Gr. 

 ornotrema, Hall, 1861, Desc. New Crin- 



oidea, p. 3, Burlington Gr. 

 pentagonus, Hall, 1860, Supp. Geo. Rep. 



Iowa, p. 57, Burlington Gr. 

 pentagonus var. convexus, see A. convexus. 

 planpconvexus, Hall, 1861, Desc. New 



Crinoidea, p. 3, and Bost. Jour. Nat. 



Hist, p. 280, Burliugton Gr. 

 pyramidatus, Hall, 1858, (Actinocrinus 



pyramidatus,) Geo. Rep. Iowa, p. 565, 



Burlington Gr. 

 springeri, White, 1882, llt.h Rep. Geo. 



and Nat. Hist. Indiana, p. 363, Keo- 



kuk Gr. 

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



564, Burlington Gr. 

 tuberosus, Troost, 1850, Catal. Hall, 1858, 



Geo. Rep. Iowa, p. 617, syn. for A. 



americanns. 

 whitfieldi, Hall, 1858, Geo. Rep. Iowa, 



p. 621, Keokuk Gr. 

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



619, Keokuk Gr. 



FlG - '^39 Agarlco- 

 hellce . 



AGASSIZOCBINUS, Troost, 1850 Mss., Shu- 

 mard, 1853, Marcy's Rep. Red Riv., and 

 Hall, 1S58, Geo. Rep. Iowa, p. 684. 

 [Ety. proper name ;. krinon, lily.] Calyx 

 conical or semielliptical ; notoramental ; 

 basals 5, usually anchylosed, very 

 small inner cavity; subradials 5, thick, 

 usually anchylosed; radials 2x5; arms 

 10 ; azygous plates 3 or 4 ; column evi- 

 denced by a small cylindrical tube ex- 

 tending from a minute cicatrix at the 

 center of the basals to the interior of 

 the cup. Type A. dactyliformis. 



carbonarius, Worthen, 1873, Geo. Sur. 

 111., vol. 5, p. 566, Up. Coal Meas. 



chesterensis, Worthen, 1873, Geo. Sur. 

 111., vol. 5, p. 558, Kaskaskia Gr. 



conicus, Owen & Shumard, 1851, Jour. 

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

 93, and Geo. Sur. 111., vol. 5, p. 557, 

 Kaskaskia Gr. 



constrictus, Hall, 1858, Geo. Rep. Iowa, 

 p. 687, Kaskaskia Gr. 



dacty lif or mi s , 

 Troost, 1850, 

 described by 

 Shumard, 1853, 

 Marcy's Rep. 

 Red. Riv., p. 

 199, Kaskaskia 

 Gr. 



gibbosus, Hall, 

 1858, Geo. Rep. 

 Iowa, p, 686, 

 Kaskaskia Gr. 



globosus, Wort! i - 

 en, 1873, Geo. 

 Sur. 111., vol. 5, 

 p. 557, Kaskas- 

 kia Gr. 



gracilis, Troost, 

 1850. Not de- 

 fined. 



hemispheric us, 

 Worthen, 1882, 

 Bull. No. 1, 111. 

 St. Mus. Nat. 

 Hist., p. 37, and 

 Geo. Sur. 111., 

 vol. 7, p. 316, FIQ 24Q _ Agasslzocrinu8 

 Kaskaskia Gr. dactyiiformis. 



occide ntalis, 



Owen & Shumard, 1852, (Poteriocrinus 

 occidentalis,) Jour. Acad. Nat. Sci. 

 Phil., vol. 2, p. 92, Kaskaskia Gr. 



papillatus, Worthen, 1882, Bull. No. 1, 

 111. St. Mus. Nat. Hist., p. 36, and Geo. 

 Sur. 111., vol, 7, p. 315, Kaskaskia Gr. 



pentagonus, Worthen, 1873, Geo. Sur. 

 111., vol. 5, p. 556, Kaskaskia Gr. 



tumidus, Owen & Shumard, 1852, (Poteri- 

 ocrinus tumidus,) Jour. Acad. Nat. Sci. 

 Phil., vol. 2, p. 90, Kaskaskia Gr. 

 AGELACRINUS, Vanuxem, 1842, (Agelacri- 

 nites,) Geo. Rep. 3d Dist. N. Y., p. 158. 

 [Ety. agele, herd ; krinon, lily.] A thin, 

 circular, parasitic disk ; upper face more 

 or less convex, and composed of thin 

 imbricating plates ; ambulr era consist- 



