422 
THE VOYAGE OF H.M.S. CHALLEHOEE. 
Aplidium fusmm^ 150, 201, 203, 206, 353, 359, 364, 
367, 372, 375, 377 (PL xxviii. figs. 8-10). 
„ incrustans, 201, 357, 361, 364, 367, 372, 
378 (PI. xxvii. figs. 3-8). 
„ leueophceum, 201, 204, 205, 354, 359, 
364, 367, 372, 375, 377 (PI. xxviii. figs. 
5-7). 
„ pedunculatum, 73, 74, 381. 
Appendicnlariidse, 2, 387, 388. 
Arrou Islands, 310, 311, 355, 360. 
Asddia, 17, 21, 23, 160, 161. 
„ aspersa, 417. 
,, scabra, 416 (PI. xlvii. fig. 11). 
Ascidise Compositse, 13, 17, 22, 28, 307, 308, 317, 
319, 347, 351, 374, 378, 379, 387, 395, 
399. 
„ Salpiformes (see Pyrosoma), 2, 28, 317. 
,, Simplices, 1, 2, 5, 13, 17, 18, 20, 22, 28, 29, 
92, 163, 205, 208, 238, 243, 306, 321, 
323, 325, 326, 328, 332, 334, 344, 346, 
351, 379, 383, 384, 387, 391, 396, 397, 
399, 401. 
„ Sociales (see Clavelinidse), 29, 30, 325, 341. 
Ascidiarium, 12. 
Ascidiidae, 17, 388, 397, 416. 
Ascidiozooid, 12, 15, 16, 28, 32, 34, 35, 40, 43, 44, 
46, 77, 81, 95, 138, 149, 151, 169, 346. 
Ascopera pedunculata, 403. 
Astellium, 307, 309, 313. 
„ spongiforme, 314. 
“Astrolabe,” 75, 76. 
Atlantic, North, 362, 363, 366. 
Atlantic, South, 362, 363, 366. 
Atnpiogaster, 151, 152, 163, 164, 383, 390, 391, 392. 
„ aurantiaca, 15, 19, 20, 164, 168, 172, 
208, 251 354, 359, 363, 367, 372, 
376. 
„ elongata, 164, 173, 175, 176, 224, 225, 
232, 356, 361, 363, 367, 372, 376 (PI. 
xxiv. figs. 1-8). 
„ elongata, vox. pallida, 164, 175, 352, 358, 
363, 367, 372, 375 (PL xxiv. figs. 9, 
10 ). 
» gigantea, 150, 164, 356, 361, 363, 367, 
372, 376 (PL xxiii. figs. 1-6). 
„ informis, 164, 171, 230, 363, 367, 372 
(PL xxiv. figs. 11-15). 
Atrial languet, 18, 34, 150. 
Atrial tentacles, 331. 
Aurantium, 149, 151, 152, 187. 
Australia, 116, 307, 323, 362, 411, 419, 420. 
Azores, 132. 
Bahia, 207, 275, 277, 279, 280, 315, 352, 358, 378. 
Balarms, 176. 
Barra Grande, Brazil, 137, 352, 358, 386. 
Bass Strait, 72, 119, 169, 235, 264, 386, 414. 
Bathymetrical distribution, 371, 374, 378. 
BatJiyoncus, 19, 153, 155, 383, 401, 407, 408, 
410. 
,, discoideus, 401, 407, 408 (PL xlvii. fig. 
6 ; PL xlviii. figs. 5-11). 
„ minutus, 401, 407, 409 (PL xlvii. figs. 
7-10). 
„ miraMlis, 331, 401, 408. 
Bay of Naples, 46, 131, 262. 
Beneden, E. van, 59, 60, 92, 306. 
Bermuda, 50, 144, 145, 266, 351, 352, 357, 378, 383, 
386. 
Berwick Bay, 209. 
Bibliography, 8. 
Blood corpuscles, 14, 18, 22, 25, 42, 43, 59, 90. 
Bolteninse, 388, 403. 
Botrylli conglomerati, 35. 
„ stellati, 35. 
Botryllidae, 13, 14, 17, 18, 21, 22, 23. 24, 25, 30, 31, 
33, 34, 36, 43, 59, 65, 144, 145, 146, 147, 
149, 250, 254, 273, 325, 326, 363, 366, 369, 
371, 374, 381, 383, 384, 385, 386, 387, 388, 
389, 396, 397, 398, 399. 
Botrylliens, 6, 15, 17, 30. 
Botrylloides, 33, 36, 37, 38, 39, 40, 43, 46, 49, 54, 
56, 60, 61, 62, 64, 166, 220, 241, 290, 
366, 374, 381, 397, 398. 
,, fulgurale, 41, 52, 60, 192, 363, 367, 371, 
374, 378, 385 (PL iii. figs. 1-8). 
,, gascoi, 46, 49. 
,, nigrum, 41, 50, 351, 357, 363, 367, 371, 
375, 386 (PL i. fig. 8; PL iii. figs. 
19-21). 
,, perspieuum, 41, 45, 49, 51, 55, 355, 360, 
363, 367, 371, 375 (PL i. figs. 4, 5 ; PL 
iii. figs. 9-14). 
,, perspieuum, var. ruiicundum, 41, 48, 355, 
360, 363, 367, 371,375 (PL i. figs. 6, 7; 
PL iii. figs. 15-18). 
„ purpureum, n. sp. {i.e., Botrylloides tyreum, 
see p. 381), 19, 34, 41, 47, 49, 54, 67, 
344, 381 (PL i. figs. 1-3; PL ii. figs. 
1 - 11 ). 
„ ruhrum, 39. 
