REPORT ON THE CRINOIDEA. 
Metacrinus wyvillit, 129, 136, 288, 342-344, 354, 
357, 358, 359, 360, 362-365, 368, 
377, 378, 387, 389, 391 (Pl. xlvii.| 
figs. 1-5 ; Pl. xlviii.). 
Miecropocrinus, 143, 216. 
_ Millericrinus, 8, 11, 25, 49, 54, 131, 135, 153, 256, 
270, 271, 281, 282, 340. 
nodotianus, 256. 
pratti, 20, 26, 51, 132, 328. 
simplex, 256. 
Monstrosities, 70, 347. 
Mouth, 56, 68-70, 91, 103, 156, 166, 403. 
Mouth-shields of Ophiurids, 2, 169. 
Museles, 9-11, 113-115, 414, 415. 
Myelodactyloidea, 192, 193. 
Myelodactylus, 192, 193. 
Myrtillocrinus, 146, 
Myzostoma, 70, 133-135, 324, 358, 364, 369. 
deformator, 324. 
pentacrini, 324, 364. 
wyville-thomsoni, 347, 362, 364. 
Neocrinoidea, 9, 38, 49, 51, 59, 142, 145, 147-157, 
160-162, 170-173, 181, 185, 194, 195, 196, 
217, 224, 270, 295, 309, 411. 
Neocrinus, 273, 279, 280, 302, 334. 
Nerve-fibres of stem, 23, 31, 116, 119, 120. 
Nervous system, 111-127, 407-416. 
Neuro-vascular axis of stem, 194, 413. 
Nodal joints in stem of Pentacrinide, 4, 12-15, 17, 
19,105, 107, 291. 
Ocular plates of Echini, 2, 168, 169, 393, 394, 402. 
Odontophore of Starfishes, 2, 398-400. 
Ollacrinus, 157. 
Onychocrinus, 41, 42, 151, 181, 182, 372. 
Oral pinnules of Antedon, 59, 115. 
Oral plates, 2, 70, 73, 94, 95, 156-164, 167-173, 178, 
184, 185, 398 ; of Bathycrinus, 234; of Coma- 
tula, 71, 72, 156; of LZolopus, 70, 72, 95, 156, 
198, 208; of Hyocrinus, 70, 72, 94, 95, 156, 
219; of Rhizocrinus, 70, 72, 156, 219, 255 ; 
of Thaumatocrinus, 70, 72, 160, 161, 371. 
Orocentral, 158, 159, 167-172, 178, 184. 
Ovary, 109-111, 210. 
Ovoid gland, 104-106, 406, 407. 
Palxocrinoidea, 32, 38, 39, 47-49, 54, 61, 68, 72, 132, 
135, 147-158, 164—167,.172, 173, 181, 185, 
194, 195, 217, 218, 224, 270, 271, 295, 358, 
363, 370-372, 394. 
' Paleostoma mirabilis, 2. 
Parambulacral network, 123, 124, 415, 416. 
437 
Parasites of Crinoids, 133-135. 
Palma animal, 301. 
Palmars, 49, 177. 
Palmier marin, 300. 
Pelmatozoa, 186, 18'7, 188, 190, 191, 193-195, 413. 
Pentacrinide, 56, 71, 83, 110, 119, 125, 132, 142, 
143, 146, 150, 154, 156, 166, 183- 
185, 192, 228, 2°70, 271, 277, 289- 
201, 294, 295, 310; Bh7, 320; 322; 
323, 326, 337, 386. 
Ambulacral skeleton of, 62, 
arms of, 55, 56, 154, 155, 
284-287 ; calyx of, 33, 
characters of young, 289— 
cirri of, 12, 288, 342; colouring 
matter of, 128, 129, 210; colonies of, 
130, 1381; disk interradials of, 73, 
76, 183; ovaries of, 110; parasites 
of, 134, 185 ; pinnules of, 55, 58, 59, 
155, 286; stem of, 3-6, 12-23, 287, 
288, 290, 291, 315-319, 342, 343; 
syzygies of, 4, 5, 254, 326. 
Pentacrinin, 128, 129 ; 204, 210. 
Pentacrinites, 272, 273. 
vulgaris, 274, 300. 
Pentacrinoid larva of Comatula, 24, 39,70, 89, 95, 95, 
101, 107, 108, 116, 127, 158, 159, 161, 164, 
194, 214, 219, 237, 251, 290, 396. 
Pentacrinus, 3, 7-10, 13, 17-19, 49, 50, 53, 58, 62, 
66, 74, 76-81, 84-88, 90, 97, 101, 103, 
104, 110, 117, 126,127, 128-132, 134— 
141, 143, 145, 148, 155, 165-167, 173, 
181, 182, 192, 195, 210, 211, 228-231, 
235, 244, 252, 256, 259, 261, 271, 272, 
278, 274-300, 302-304, 316-320, 326, 
340-343, 364, 369, 386, 388, 391, 392, 
394, 409, 415. 
Basals of, 34, 35, 282-284, 293, 336; 
chambered organ of, 105, 292; disk of, 
68, 76, 77, 91, 279; geographical and 
bathymetrical distribution of, 136-141, 
300, 343, 391, 392; geological history 
of, 294-300 ; intervisceral blood-vessels 
of, 101, 102; labial plexus of, 93, 100 ; 
plexiform gland of, 105; primary inter- 
radial cords of, 124-126, 292, 293; 
radials of, 289, 293, 294; radial plug 
of, 34, 293; stem of, 12-23, 287, 288, 
315-319, 342, 343; vascular axis in stem 
of, 23, 107 ; water-vascular ring of, 93. 
