GENERAL INDEX. 819 
Anthemocrinus, 77, 215. 
Anus, 21, 35, 124, 134, 139, 155. 
of Carabocrinus, 137. 
of Cupressocrinus, 137. 
— of Cyathocrinus, 137. 
of Haplocrinus, 94, 137. 
of Hyocrinus, 94. 
of Ichthyocrinus, 138. 
—— of Pisocrinus, 136. 
of Poteriocrinus, 137. 
of Symbathocrinus, 137. 
covered by a Gasteropod, 240, 566, 704, 
793. 
Aorocrinus, 362, 470, 487, 547. 
canaliculatus, 475. (Pl. XLV, figs. 
6a, b.) | 
Cassedayi, 483. (PI. XLII, figs. 11a-12.) 
—— concavus, 482. (Pl. XLII, figs. 13a-c.) 
— elegans, 480. 
—— helice, 481. (Pl. XLV, fig. 2, 5.) 
—— immaturus, 471. 
parvibasis, 473, 477. (Pl. XLV, figs. 
3a, b.) 
parvus, 477. (Pl. XLV, figs. 11a, b.) 
—— radiatus, 472. (Pl. XLV, fig. 1.) 
spinosulus, 478, 481.. (Pl. XLII, fig. 4; 
XLIV, figs. 8a, b.) 
subaculeatus, 476. (Pl. XLV, figs. 7a, b.) 
Apiocrinide, 53, 59, 65, 117. 
Apiocrinus, 13, 40, 60, 69, 117, 152. 
—— roissyanus, 24, 117. 
Archeocrinus, 119, 175, 215, 249, 253. 
—— desideratus, 257. (Pl. X, figs. 4a, b.) 
—— lacunosus, 254, 255. (Pl. X, fig. 1.) 
- marginatus, 275. 
—— microbasalis, 256. . (Pl. X, figs. 2a-c.) 
—— priscus, 278. 
pyriformis, 255. (Pl. X. figs. 3a, b.) 
sculptus, 251. 
Armlets, 34, 82, 160. 
Arm openings, 386, 86. 
Arm plates, or ‘‘free brachials,” 33, 73. 
Arms, 33, 73, 88, 155. 
biserial, 34, 78, 155, 161. 
uniserial, 34, 78, 155. 
paired, 86. 
commence at, 69. 
—— mobility and mode of union, 87, 155. 
mode of branching, 75, 78, 86, 155, 161, 
364. 
Arthracantha, 741, 747. 
Arthracantha depressa, 751. (Pl. LXXVI, 
figs. 3a, b.) 
ithacensis, 747, 749. (Pl. LX XVI, figs. 
la-c.) is 
punctobrachiata, 750, 752. (Pl. LXXVI, 
figs. 2a, b.) 
Articles brachiaua, 17. 
Articulata (W. and Sp.), 26, 33, 149, 152, 154, 
169. 
—— (J. 8. Miller), 13, 152. 
— (Joh. Miller), 15, 152. 
—— (Zittel), 23. 
Articulation, 37, 87. 
Articulosa, 158. 
Asteria; 12. 
Asteroblastus, 146. 
Asterocrinus (Minster), 292. 
Asterocrinus (Lyon), 292, 791, 793. 
capitalis, 794. 
coronarius, 795. 
Astracrinoidea, 16. 
Astrocrinites (Cumberland), 292. 
Astrocrinites (Conrad), 292. 
pachydactylus, 296. 
Astrocrinus (Ether. and Carp.), 292. 
Astropodia, 647. 
Astylida, 16. 
Astylocrinus, 17. 
Astylocrinide, 172. 
Asymmetry, 146. 
Atelestocrinus, 132, 148, 159. 
Aulocrinus, 138. 
Agassizi, 138. (Pl. VII, fig. 9.) 
Axial canal, 33, 36, 45, 100, 140. 
Axial cords, 36. 
Axillaries, 34. 
Baerocrinus, 72, 131, 148, 158. 
Balanocrinus, 207. 
sculptus, 208. | 
Barrandeocrinus, 362, 484, 485. 
—— sceptrum, 485. (PI. VIII, fig. 1.) 
Barycrinus, 41, 45, 82, 132, 160. 
Basalia, 15. 
Basals, 15, 17, 27, 33, 52. 
anchylosis of, 57. 
evolution of different, 54-56. 
inferior face, 158. 
orientation of, 57, 153. 
orientation in Blastoids, 57, 153. 
outer face, 158. 
upper face, 37. 
