INDEX. 
Where more than one reference is given, the figures in darker type indicate the most important page. 
Abdomen, 15, 16, 30, 149, 159, 273. 
Abyssal zone, 153, 374. 
Adriatic, 310. 
Alcyonium digitatum, 63, 279. 
Alder, J., 6, 38, 177, 184, 323. 
Alimentary Canal, 21, 25, 34, 87, 100, 232, 334. 
Amaromium, 92, 148, 149, 151, 152, 164, 177, 
180, 200, 214, 215, 229, 366, 370, 
390, 392. 
„ alUdum, 150, 215, 234, 354, 359, 
364, 368, 372, 376 (PI. xxvi. figs. 
11 - 12 ). 
„ colelloides, 215, 233, 353, 358, 364, 368, 
372, 377, 386 (PI. xxvii. figs. 9-12). 
,, complanatum, 215, 219, 221, 353, 359, 
364, 368, 372, 377 (PI. xxx. figs. 16, 
17). 
„ glohosum, 188, 215, 219, 354, 359, 364, 
368, 372, 375, 377, 386 (PI. xxix. figs. 
1-5). 
„ hepaiicum, 215, 229, 364, 368, 372 (PI. 
XXV. figs. 13, 14). 
„ irregulare, 215, 223, 225, 356, 361, 364, 
368, 372, 377 (PI. xxx. figs. 1-7). 
,, irregulare, var. concinnnm, 225, 356, 361, 
364, 368, 372, 377 (PI. xxx. fig. 
8 ). 
„ loeoigatum, 198, 199, 215, 231, 251, 356, 
361, 364, 368, 372, 377 (PI. xxx. figs. 
12-15). 
„ nigrum, 215, 236, 353, 359, 364, 368, 
372, 376 (PL xxxi. figs. 17-19). 
I Amaroucium pallididum, 215, 226, 357, 361, 364, 368, 
372, 376, 386 (PI. xxx. figs. 9-11). 
„ proliferum, 35, 91, 124, 229. 
„ recumbens, 215, 227, 356, 361, 364, 
368, 372, 377, 386 (PI. xxix. figs. 
13-15). 
„ variabile, 178, 179, 212, 215, 216, 217, 
223, 228, 353, 354, 359, 364, 368, 
372, 375, 377, 420 (PI. xxix. figs. 
7-12). 
,, variabile, var. tenerum, 219, 353, 354, 
359, 364, 368, 372, 375, 377 (PL 
xxix. fig. 6). 
America, South, 361, 362, 363, 366. 
Anatomy, 12, 16. 
Anatomy of Colella pedunculata, 77. 
Anatomy of Colella thomsoni, 95. 
Ancestral Botryllidm, 37. 
Aplidium, 29, 76, 127, 148, 149, 151, 152, 180, 183, 
187, 199, 200, 214, 229, 242, 366, 383, 
390, 392. 
„ asperuni, 200, 238. 
„ crassum, 201, 207, 352, 358, 364, 367, 372, 
375 (PL XXV. figs. 15, 16). 
„ despectum, 201, 210, 352, 358, 364, 368, 
372, 377, 386 (PL xxviii. figs. 11-13). 
„ fallax, 201, 209, 364, 368, 372, 375, 383, 
386 (PL xxviii. figs. 1-4). 
,, fuegienee, 218, 223. 
,, fumigatum, 201, 211, 353, 354, 356, 359, 
360, 364, 368, 372, 375, 377 (PL xxvi. 
figs. 8, 9). 
