434 
Circular commissure, 40, 117, 413; of Bathycrinus, 
126, 228-230; of Comatule, 125; of Penta- 
crinus, 125; of Rhizocrinus, 126, 258. 
Cireumvisceral coelom, 67. 
Cirri, 7, 107, 108, 114, 132, 414; of Bourgueticrinide, 
27, 28; of Comatule, 132, 414; of Pentacri- | 
nid, 12, 288, 342. 
Cirrus-vessel, 15, 23, 107, 292, 412. 
Clypeaster, 394. 
Coccocrinus, vault of, 160-163, 170, 174, 175, 178, 185. 
Comaster, 151, 403. 
Comatula, 3, 4, 6, 8-10, 18, 19, 22, 24, 25, 33-36, 38, 
40, 44, 45, 48-53, 55, 56, 58, 59, 62, 
63, 68, 70-74, 76, 78, 83-85, 88, 90, 91, 
J3-9o oie LOG Oe LOD LT wo: 
124, 125, 130-135, 144-148, 154-156, 
164-166, 169, 175, 3177, 181, 183-185, 
192, 230, 249, 252, 254, 255, 261, 273, 
277, 279, 285-287, 289-294, 316, 319, 
324, 326, 337, 340, 
401, 412, 413, 415. 
Ambulacra of, 68, 156; ambulacral plates | 
of, 62, 74, 83, 84, 175, 181; arms of, 52, 
55, 147, 337; axial cords of, 119, 121~ 
123, 408, 409; basals of, 34-36, 251, 
284, 402, 403 ; centro-dorsal of, 25, 106, 
107, 132, 292; chambered organ of, 106, 
107, 292, 404, 412; circular commissure 
of, 125; cirri of, 132, 414; disk of, 68- 
70, 84, 85, 90; geographical and bathy- 
metrical distribution of, 136-141; mon- 
strosities of, 70; oral plates of, 71, 72, 
156; pinnules of, 58, 59, 83; radials of, 
147, 289, 293, 294; reparation of, 60, 
255; syzygies of, 4, 53. 
Comatulide, 142, 192, 370. 
Conocrinus, 245, 247, 248. 
cornutus, 258. 
pyriformis, 248, 257. 
seguenzal, 257. 
suesst, 257. 
Consolidating plates of Cupressocrinus, 162. 
Convoluted organ of Actinocrinide, 87, 165. 
Costal plates, 396-399. 
Costata, 190, 195. 
Cotylecrinus, 68, 143, 161; systematic position, 213- 
217. 
docens, 213." 
miliaris, 214. 
Cotylederma, 213. 
363, 370-372, 393, | 
THE VOYAGE OF H.M.S. CHALLENGER. 
Covering plates, 62-66, 74-83, 115, 166, 173-175, 
181, 185, 220. 
Crinactinota, 190, 191. 
Crinoidea, 186, 187, 188-195. 
Crotalocrinus, 54, 65, 66, 157. 
| pulcher, 65, 
| Culicocrinus, summit plates of, 170, 175. 
| Cupressocrinus, 48, 150, 152, 153, 162. 
Cupule of Cotylecrinus, 213, 214. 
| Cyathidium, 143, 202; systematic position, 211-216. 
sptleccense, 212. 
Cyathidiocrinide, 211. 
Cyathocrinide, 153, 155, 160, 162, 164, 173, 181. 
Cyathocrinus, 44, 45, 48, 60-66, 146, 151, 154, 161— 
164, 169, 173-175, 178, 185, 224, 
394-398. 
alutaceus, summit of, 173. 
zowensis, ambulacra of, 65. 
levis, summit of, 173. 
longimanus, ambulacra of, 65, 66, 84. 
malvaceus, summit of, 172. 
ramosus, ambulacra of, 66. 
Cycloblastus, 191. 
Cyclocystoides, 192. 
Cystide, 192. 
Cystidea, 54, 109, 132, 148, 149, 154, 186, 188-195. 
Cystoblastus, 191, 
Cystoidea, 186, 195. 
Deltoid pieces of the Blastoidea, 162. 
| Democrinus, 28-30, 245, 264, 268, 269. 
parfaiti, 262, 264, 269. 
Dendrocrinus caset, 45. 
navigiolum, 20. 
Dichocrinus, 39, 222, 223. 
intermedius, 223, 
Digestive tube, 1, 84, 86-92. 
Disk, 1, 67, 75, 80, 81, 84, 85, 88, 90, 182, 184, 342 ; 
| of Actinometra, 69,70, 85 ; of Antedon, 68, 84, 
85; of Bathycrinus, 234, 235; of Hyocrinus, 
219; of Metacrinus, 59, 68, 80, 81, 93, 342; 
of Pentacrinus, 68, 76, 77, 91, 279. 
Distichals, 49, 50, 177. 
Dorsocentral, 18, 132, 157, 158, 168, 169, 274, 275, 
| 393-396, 398-400. 
| Echinospheerites, 192, 195. 
| Echinozoa, 95, 105, 106, 193, 194, 406. 
| Edrioaster, 192. ‘ 
Edriocrinus, 148, 194, 195, 217, 319. 
| Eleacrinus, 164, 173. 
| Eleutherocrinus, 132. 
