436 



THE VOYAGE OF H.M.S. CHALLENGER. 



Hyoerinus continuod — 



oral plates of, 70, 72, 94, 95, 156, 219; 



pinnules of, 59-61, 219, 224; side plates 



of, 82, 220; stem of, 5, 31, 32, 218, 221; 



systematic position of, 222-224; testes of, 



220; water-pores of, 94, 95, 219, 220, 

 hethcllimws, 218-222, 240, 376, 378, 386, 



389, 391 (PL vc. figs. 4-18; PI. vi.). 

 Hyponome sarsi, 67, 85, 166. 

 Hypozygal, 4, 50, 54. 



Ichthyocriiiidre, 42, 76, 149, 155, 166, 181-185, 195. 

 Ichthyocrinus, 185, 195. 

 Hy aster, 401. 

 Ilycrimis, 225. 

 Inarticulata, 145. 

 Infra-nodal joint, 13. 

 Interartioular pores, 18. 

 Internal casts of Actinocrinichv, 165, 174. 179, 182 ; of 



Plat ycrinus, 179. 

 Interpalmar areas of disk, 69, 81, 84, 165, 166, 174, 180. 

 luterradials of caly.x, 38-46, 74, 162, 178, 371. 

 Interradials of perisome, 42-44, 73, 74, 76, 18.3, 371. 

 Intervi-sceral blood-vessels, 87, 97-105, 405, 406. 

 Intervisceral coelom, 67, 109. 

 Iiitervisceral ple.xus, 86, 87. 



Intra-radial commissure of Comatula and Pentacrinus, 

 125, 126; of Bathycrinus, 127, 229 ; of PMzo- 

 crinus, 126, 253. 

 loerinus, 46, 363. 

 Ids, 272, 300, 302. 

 Isocrimis, 271-273, 281. 



2)endHlus, 34, 284. 

 Labial plexus, 93, 97-101, 103-105, 404-406. 

 Lccanocrinus rcemcri, 217. 

 Lo/pidodisms, 85. 

 Lichenocrinoidea, 192. . 

 Liclienocrinus, 192. 



diibiiis, 20. 

 Ligaments, of arms, 7-9, 414 ; basiradial ligaments of 



Bathycrinus, 228 ; of stem, 5-7, 13, 23. 

 Madreporic canal of Ecbinozoa, 106, 194, 406. 

 Mariacriiius, 155, 171. 

 Marsupiocrinus, vault of, 171, 175-177 

 depressus, 176. 

 radiatus, 176. 

 Marsupites, 34, 48, 68, 132, 142, 145, 151, 155, 181, 



183, 196, 216, 394-398. 

 Marsupitidae, 142. 

 Mi'gistocriniis, 54. 

 Mesoerinus, 24, 237, 255-257, 323. 



Metucrinus, 10, 13, 110, 124, 128, 134, 148, 152, 154, 

 205, 270-272, 275, 283, 285-288, 291, 

 300, 304, 311, 320, 334, 336, 339, 



340, 341-344, 357, 359, 360, 362, 369, 

 370, 387, 388-391 ; arms of, 55, 285, 

 286, 342 ; cirri of, 288, 342 ; disk of, 

 59, 68, 80, 81, 93, 342; geographical 

 and bathymetrical distribution of, 136- 

 142, 343 ; pinnules of, 10, 55, 58, 155, 



341, 342; pinnule-ambulacra of, 81, 

 82; radials of, 48-51, 341, 357; stem 

 of, 14, 15, 17, 19, 287, 288, 342, 343. 



ahf/idatiis, 19, 51, 60, 70, 80, 81, 110, 

 134, 287, 288, 293, 342, 344, 345, 

 346, 348, 355, 357, 364, 366, 369, 

 370, 377, 387, 389 (PI. xii. figs. 1-14; 

 Pis. xxxviii., xxxix.). 



ciiujidatus, 17, 80, 81, 287, 288, 342, 

 344, 346, 347, 348, 35.5, 357, 358, 



369, 377, 387, 389 (PI. xl. ; PI. xli. 

 figs. 1-4). 



costatus, 17, 35, 82, 129, 284, 288, 342, 

 344, 359, 360-362, 363-366, 368- 



370, 378, 387, 389 (PI. xlvii. fig. 13; 

 PL xlix.). 



iletacrinus dredged by tlie " Vega," 340> 



343, 344, 368, 387, 388. 

 interruptus, 134, 288, 342-344, 367, 



368, 369, 377, 387, 388 (PL liL). 

 moseleij!, 17, 129, 341, 344, 355, 356, 



357-359, 37.8, 387, 389 (Pis. xlv., 



xlvi.). 

 murrayi, 17, 78, 81, 82, 128, 140, 184, 



326, 342-344, 349, 350, 351, 352, 



355, 377, 378, 387, 389 (PL xli. 



figs. 12-17; PL xliL). 

 nohilis, 17, 80-82, 287, 344, 350, 351, 



352, 353, 355, 369, 377, 387, 389 



(PL -xlL figs. 5-11; PI. xliiL). 

 nodoms, 51, 76, 80-82, 289-291, 342, 



344, 359, 362, 364, 365, 366, 368- 

 370, 377, 387, 389, 391 (Pis. L, IL). 



rotundus, 343,- 344, 357, 387, 388. 



stewarti, 288, 344, 387. 



superbus, 344, 351, 352, 355, 387. 



tuberosus, 134, 288, 342, 344, 369, 370, 

 377, 387, 389 (PL liii. figs. 1-6). 



varians, 17, 129, 134, 288, 342, 344, 

 351, 352, 353, 354, 355, 366, 378, 387, 

 389 (PL xliv. ; PL xlviL figs. 6-12). 



