GENERAL INDEX 



483 



Pycnosaccus, 27, 28, 33, 34, 35, 37, 39, 41, S3, 55, 178, 

 180-183, 198. (Text-figs. 3 and 19). 



perisomic integument, 181. 



— — legmen, 182. 



the species of, 182. 



■ americanus, 188. (PI. XIII, fig. 10). 



bucephalus, 187. (PI. XII, figs, ioa-11). 



calyculus, 185. (PI. XIII, figs. 6-96). 



canadensis, 189. 



castatus, 182, 183, 184. (PL XI, fig. 10). 



dubius, 189. (PI. XIII, figs, no, 6). 



nodulosus, 184. (PI. XI, figs. na-i6c). 



ornatus, 188. 



patei, 186. (PI. XII, figs. 1-96). 



scrobiculatus, 183. (PI. XI, figs, ia-10). 



tenuibrachiatus, 187. (PI. XIII, figs. ia-2). 



■ welled, 188. (Pi. XIII, figs. 30-56). 



sp. from the Laurel limestone, 182. 



Quartibrachs (IVBr), 21. (PI. XXIV, fig. 23). 

 Quenstedt, F. A., 108, 202, 306, 363, 399, 414. 



Racine formation, 9, 287. 



Radials (RR), and Brachials (Br), 21, 41-45. 



r. post R, 41. 



Radianal (RA), 21, 56-59, 85-90, in, 126, 208, 262. 



abnormal, 133, 136. 



homology, 56. 



migration, 56-59, 61, 80, 85, 86, 113. 



position, 56, 58, 126. 



primitive, 58, 90, 345. 



in Clidochirus, 295. 



Forbesiocrinus, 57, 58. 



Homalocrinus, 57, 149. 



Ichthyocrinus, 57, 268. 



Lecanocrinus, 57, 126. 



Protaxocrinus, 57, 58, 345. 



Recent crinoids, 80-91. 



Sagenocrinus, 58, 216. 



Taxocrinus, 57. 



■ Temnocrinus, 57, 208. 



Radius, 21. 



Ramules, 20, 47, 152, 420. 



Rathbun, R., 4. 



Ratte, F., 98. 



Raymond, Percy E., 18. 



Rays, 21, 431. 



buttresses, 350. Expl. PI. XLV. 



fan-shaped, 262. 



fringed, 366. 



interlocking, 262, 268, 418, 423, 427. 



non differentiation of, 262. 



number, 4, 6, 7, and 10 (see Abnormalities). 



■ unequal, 46, 171, 172. 



Recent crinoids, 5, 6, 13, 30. 



■ axial canal, 36. 



collections, 5, 6, 7. 



column, 30. 



distribution and abundance, 97, 98. 



number of species, 6, 97, 98. 



proximale in, 30. 



Rectum, 22 (see Anus). 

 Recuperation of calyx, 32, 402, 403. 

 Recurrent ambulacra, 347. 



Reed, F. R. Cowper, 98. 



Reteocrinidae, 53, 90. 



Reteocrinus nealli, 90. (PI. LXXV, figs. 7, 8). 



Resorption of infrabasals (see Atrophy). 



Rhipidocrinus, 77. 

 Rhizocrinus, 403. 

 Rhodocrinidae, 53, 217. 

 Rhodocrinites verus, 218. 

 Rhodocrinus, 77. 



gracilis, 367. 



nuntius, 302. 



thicmei, 329. 



■ verus, 218. 



Rhopalocrinus, 453. 



gracilis, 453. (PI. LXXV, figs. ua-d). 



Richfield, Ohio, position of beds, 247. 

 Richmond formation, recurrent types, 349. 

 Ricker, Mrs. E., 15. 



Ricker, Maurice, 15. 



Ridges on plates, 27, 37, 39, 141. 



Riks Museum, Stockholm, 3, 133, 134. 



Ringueberg, E. N. S., 8, 129, 130, 176. 



Rochester shale, 8. 



Roemer, C. R, 108, 137, 210, 378. 



Roemer, F. A., 361. 



Rofe, John, 315. 



Rolfe, C. R., 18. 



Rominger, Carl, 5, 11, 492. 



Rowley, R. R., 7, 306. 



Russian Carboniferous, 9, 13, 335, 340. 



Rutherglen, History of, 24, 339. 



Safford, J. W., 260. 



Sagenocrinidae, 41, 44, 93, 118, 120, 122, 205-206. 



analysis of genera, 205. 



distribution, 205. 



Sagenocrinites, 215. 

 ■ c.vpansus, 218. 



giganteus, 218. 



Sagenocrinoidea, 113, 120, 122-124. 



Sagenocrinus, 46, 53, 57, 58, 64, 65, 76, 113, 114, 



215-218, 242. (Text-fig. 24). 



plan, 64. 



radianal, 216. 



■ the species of, 218. 



americanus, 221. (PI. XIX, fig. 5). 



clarki, 220. (PI. XIX, figs. 4a-d). 



expansus, 218. (Pis. XVIII, figs. 1-9; XIX, 



figs. ia-3c). 



Salter, J. W., 138, 139. 



Sardeson, F. W., 8. 



Sars, M., 69. 



Savage, T. E., 18. 



Scharff, R. F., 439. 



Schluter, C, 18. 



Schuchert, Charles, 18. 



Schultze, L., 3, 127, 307, 309, 37S. 



Schultzicrinus, 36. 



Secundibrachs (IIBr), 21. 



Sedgwick, Museum, Cambridge, 3, 138. 



Seeliger, O., 39. 



Senzielles, Belgium, 312. 



Shumard, B. F., Owen and, 7. 



Side-pieces, 21. 



Silurian, 8, 96, 349. 



Sinuous sutures (see Arcuate sutures). 



