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828 GENERAL INDEX. 
Habrocrinus ornatus, 118, 120. 
Hadrocrinus, 77, 265, 267, 327. 
—— discus, 328. (PI. XXIV, fig. 1.) 
pentagonus, 327. 
plenissimus, 328. (Pl. XXIV, figs. 
2a, b.) 
Haplocrinacea, 29. 
Haplocrinus, 29, 72, 89, 91, 95, 97, 187, 
172. 
—— mespiliformis, 89, 92. (PI. III, figs. 
Zz 10.) 
Hemisphericus group, 703. 
Herpetocrinus, 44, 158. 
Heterocrinide, 82, 172. 
Heterocrinus, 41, 67, 71, 82, 129, 157, 779. 
bellevillensis, 131. 
Hexacrinide, 838, 106, 163, 165, 170, 645, 
741, 742, 803. 
Hexacrinites, see Hexacrinide. 
Hexacrinus, 79, 647, 741, 744, 747. 
—— leai, 746. (Pl. LX XVIII, figs. 12a, b.) 
—— melo, 745. 
— occidentalis, 745. (Pl. LX XVIII, fig. 10.) 
Hexagonal base, 165, 363. 
Historical, 11. 
Holupus, 14, 94, 142. 
Homocrinus, 45, 78, 131, 159, 161. 
—— scoparius, 45. 
Hoplocrinus, 71. 
Hybocrinide, 57, 82, 116, 147, 162, 172. 
Hybocrinus, 67, 71, 129, 133, 162. 
Hybocystis, 71, 146. 
Hydreionocrinus, 80. 
Hyocrinus, 58, 78, 94, 99, 118. 
bethellianus. (Pl. III, fig. 10.) 
Fypanthocrinus, 832, 335. 
decorus, 336. 
Hypascocrinoidea, 29, 148. 
Hyptiocrinus, 188, 200. 
typus, 201. (Pl. XIX, figs. 6a-c.) 
Hypozygal joints, 34, 81. 
Hystricrinus, 747. 
Carpentert, 750. 
Ichthyocrinacea, 29. 
Ichthyocrinide, 40, 58, 64, 87, 118, 123, 152, 
158, 172. 
Ichthyocrinus, 77, 147, 152. 
Icosidactylocrinites, 268. 
Idiocrinus, 188, 202. 
—— elongatus, 203, 206. (Pl. XVIII, figs. 
8a-C.) 
Idiocrinus immaturus, 206. (Pl. XVIII, figs. 
10a-c.) 
—— tennesseensis, 206. (Pl. XVIII, fig. 11.) 
—— ventricosus, 203, 205. (Pl. III, fig. 15; 
XVIII, figs. 9a, b.) 
Impinnata, 152, 169, 172. 
Inadunata, 26, 33, 35, 147, 150, 156, 169. 
Inarticulata, 13. 
Inferradials, 38, 71, 154. 
Infrabasals, 26, 83, 52, 53, 61. 
anchylosis of, 59. 
—— of Agassizocrinus, 59. 
of the Apiocrinide, 60. 
of Comatule, 53, 64. 
of Cupressocrinus, 59. 
of Extracrinus, 53, 61. 
of the Fistulata, 58. 
—— of the Ichthyocrinide, 58, 64. 
—— of Millericrinus, 53, 61. 
- of Stemmatocrinus, 59. 
Inner floor of tegmen. (Pl. V, figs. 13-17.) 
Interambulacrals, 34, 36, 105. 
Tnteraxillaries, 35. 
Interbrachials, 34, 105. 
Interdistichals, 15, 35, 105. 
Internal cavity, 106, 120, 140. 
Internodal joints and internodes, 33, 40, 
155: 
Interpalmars, 15, 35, 105. 
Interradial plates, 15, 34, 105, 646. 
of Cyathocrinus, 96, 114. 
— of the Reteocrinidz, 106, 110, 174. 
of the Rhodocrinide, 106, 217. 
— of the Platycrinide, 646. 
Iocrinus, 68, 71, 78, 126, 180, 133, 158. 
Lampterocrinus, 175, 188, 207, 211. 
inflatus, 208. 
—— parvus, 208. 
—— tennesseensis, 208. (PI. XIII, figs. 10a— 
d.) 
Larva of Comatulee, infrabasals in, 64. 
Larviformia, 26, 72, 87, 150, 154, 162, 169. 
Lecanocrinus Billingsi, 139. 
—— macropetalus, 139. 
Lepidocentrus eifelianus, 748. 
Liberia, 16. 
Lobocrinus, 361, 367, 375, 885, 434. 
——— equibrachiatus, 875, 440. (Pl. XXIX, 
figs. 8a, bs; XLVI, figs. 6a, b.) 
var. asteriscus, 441. (Pl. XXIX, 
figs. 9a, b.) 
