428 
THE VOYAGE OF H.M.S. CHALLENGEE. 
Pseudodidemnum crystullinum, 314, 
„ listei'ianum, 314. 
„ zoster arum, 314. 
Pijrosoma, 68, 317, 319, 320, 322, 384, 388, 389, 
393, 394, 395, 399. 
Pijura, 326. 
Quoy and GaimarJ, 73, 74, 75. 
llenal organ, 23. 
Renier, 5, 215. 
Reproductive organs, 23, 88, 100, 162, 255, 385, 
395. 
Respiratory organ in test, 54, 387, 397. 
Reticulatse, 30. 
Retractor muscles, 15. 
RhopaliHa, 32. 
Rondeletius, 5, 
Salpia, 52, 395. 
Salpidse, 387. 
Sarcohotrylloides, 33, 34, 36, 37, 38, 46, 56, 58, 62, 
374, 397, 398. 
„ superhum, 56, 57. 
„ wyvillii, 25, 56, 57, 60, 92, 102, 
363, 367, 371, 378, 385, 386, 
397 (PL iv. figs. 12-18). 
Sarcodictyon', 279. 
Savigny, 5, 15, 28, 29, 35, 38, 59, 61, 148, 151, 183, 
186, 199, 214, 256, 259, 414. 
Schlosser and Ellis, 5. 
Scilly Isles, 323. 
Sertularia operculata, 58, 63. 
Sidnyum, 148, 149, 151, 152, 163, 176, 180, 183, 199, 
390, 392. 
„ pallidum, 180, 183, 184, 204, 353, 358, 
367, 364, 372, 376, 383 (PI. xxv. figs. 
4-6). 
,, turhinatum, 177, 183, 184. 
SigilUna, 29, 70, 148, 149, 151, 152, 164, 200, 214, 
390, 392. 
Simon’s Bay, and Cape of Good Hope, 154, 175, 
185, 233, 245, 246, 279, 288, 289, 301, 329, 
333, 352, 358, 362, 378, 386, 406. 
Sluitcr, Dr. C., 389, 406. 
Southern Ocean, 362, 363, 366. 
Sphincters, 17, 82. 
Spicules, 14, 133, 135, 138, 139, 142, 255, 256, 
260, 263, 270, 271, 273, 308, 382, 
395. 
Stigmata, 19, 2.5, 34, 44, 83, 98. 
Stomach, 21, 22, 163, 176, 179, 187, 255, 276, 
337. 
Strait of Magellan, 76, 165, 173, 219, 223, 228, 231, 
251, 282, 283, 285, 324, 327, 338, 342, 343, 
345, 362, 384, 386. 
Styela, 156, 324, 325, 334, 344, 345, 348. 
,, bythia, 415. 
„ grossularia, 412. 
,, pusilla, 411 (PI. xlix. figs. 7-8). 
„ radicosa, 410, 411 (PI. xlix. figs. 9-10). 
Styelinse, 324, 334, 344, 388, 398, 403, 407. 
Suhm, Dr. E. v. Willemoes, 403. 
Sulu Sea, 94. 
Symplegma, 18, 70, 71, 72, 144, 383, 388, 397, 
398,. 
„ viride, 144, 351, 357, 363, 367, 372, 
375 (PL xviii. figs. 7-14). 
Synascidiee, 258, 399. 
Synoicum, 148, 149, 151, 152, 163, 176, 180, 183, 
390, 392. 
Synstyela, 31, 324, 326, 327, 341, 342, 398, 399. 
„ incrustans, 325, 326, 337, 342, 348, 349, 
355, 356, 360, 361, 365, 369, 370, 373, 
376, 377, 386 (PL xlvi. figs. 9-14). 
Synstyela variegata, 324. 
System, 13, 16, 24, 34, 35, 37, 38, 40, 43, 66, 60, 124, 
149, 166, 249, 396. 
Tahiti, 406. 
Tailed larva, 6, 52, 61, 89, 101, 105, 109, 130, 131, 
134, 140, 147, 171, 173, 193, 196, 210, 211, 
227, 229, 246, 249, 265, 283, 304, 320, 322, 
333, 335, 345, 385, 386. 
Tangier Bay, 62, 66, 67, 127, 129, 290, 291, 295. 
Temperature at bottom, 379. 
Tentacles, 20, 34, 44, 62, 86, 99, 140, 163, 306. 
Test, 13, 16, 32, 34, 35, 40, 43, 78, 96, 237, 308. 
Tetradidemnum, 258. 
„ gigas, 259. 
Thaliacea, 2, 28. 
Thompson, W., 6. 
Thomson, Sir Wyville, 57, 295, 339. 
Thorax, 16, 16, 30, 159. 
Thylacium, 323, 324, 325, 326, 327, 341, 346, 398. 
„ aggregatum, 323. 
,, normani, 323. 
„ sylvani, 323, 
„ variegatum, 323, 324, 342. 
Tizard, Captain, 57. 
Tongatahu, 269, 354, 360. 
Torres Straits, 106, 193, 247, 386. 
Trididemnum, 257, 258, 260. 
,, henda, 260. 
