INDEX. 



The figures in dark type indicate the page on which the genus or species is described. 



Abyssascidia, Herdm., 31, 38, 46, 183, 184, 185, 186, 

 187, 188, 193, 266, 270, 282, 283. 

 wyvillii, Herdm., 188, 192, 194, 251, 

 256, 279 (PL xxvii). 

 Alder, 7, 26. 



Alimentary canal, 45, 51, 283. 

 Alternation in circulation, 6, 51. 

 Amaroucium, 48, 51, 55. 

 Amoeboid larva, 59. 

 AnureUa, 9, 59, 67, 68. 

 Aperture, atrial, 31. 



branchial, 31, 32. 

 Appendicularia, 7, 8, 40, 42, 48, 53. 

 Appendiculariidse, 31, 36, 40, 41, 51, 55. 

 Aristotle, 5. 

 Aseidia, Miiller, 67, 86, 189, 196, 233, 245. 



Linn., 6, 35, 46, 49, 51, 54, 55, 60, 93, 125, 

 134, 135, 138, 141, 146, 149, 154, 167, 

 184, 185, 187, 193, 196, 221, 231, 234, 

 266, 284. 

 ampulloides, van Ben., 60. 

 aspersa, O. F. Mull., 199, 238. 

 atra, Lesueur, 210. 

 borealis, Sav., 245. 

 canina, O. F. MiilL, 234. 

 challengeri, n. sp., 201, 250, 251, 256 (PL 



XXX.). 



clavata, Pall., 245. 



complanata, Fabr., 200. 



compressa, 42. 



conchilega, 281. 



corrugata, O. F. Mull., 234. 



cylindracea, Herdm., 216, 252, 257 (PL 



xxxiii. figs. 7-9). 

 depressa, Alder, 125, 199. 

 despecta, Herdm., 218, 251, 256 (PI. xxxiii. 



figs. 10-12). 



Aseidia falcigera, Herdm., 210, 211, 250, 255 (PL 



xxxii. figs. 1-6). 

 fusifvrmis, Herdm., 42. 

 intestinalis, Linn., 234. 

 invohda, Heller, 198. 

 lepadiformis, O. F. MiilL, 245. 

 longitubis, Heller, 198. 

 mammillata, Cuv., 31, 44. 

 mentula, 14, 46, 198, 200, 203, 204. 

 meridionalis, Herdm., 199, 200, 207, 254, 



258, 259, 270 (PL xxxi. figs. 4-8). 

 mollis, Han., 213. 



Yerrill, 213. 

 ni<jra, Sav., 198, 201, 210, 211, 249, 250, 



255. 

 obliqua, 213. 



papittosa, C. G. Cams, 133. 

 parallelogramma, O. F. MiilL, 189. 

 plan nt„, Herdm., 206, 251, 256 (PL xxxi. 



tigs. 1-3). 

 pulchella, Alder, 234. 

 pyriformis, Herdm., 219, 252, 257 (PL xxxiv. 



figs. 1-6). 

 scahra, 44. 



styeloides, Traust., 199. 

 lenera, Herdm., 206, 213, 254, 258, 259, 270 



(PL xxxii. iigs. 7-10). 

 tinctor, Q. and G., 170. 

 tmnslucida, Herdm., 210, 215, 251,256 (PL 



xxxiii. figs. 1-6). 

 vasal"*,, Herdm., 205, 251, 256. 

 venosa, 38. 



mrginea, O. F. MiilL, 31, 45, 50, 200, 215. 

 Ascidiacea, 25. 

 Ascidite Composite, 25, 28, 29, 31, 35, 39, 41, 42, 18, 



49, 51, 55, 57. 

 Salpiformes, 25. 



