I nili X. 



nigrosetosa, 303, 376. 377. 378, 

 379. 380, 381, 382; specific 

 characteristics, 431. 

 rugosa, 357. 358, 360, 363, 374, 

 376, 377, 37*. 379. 380, 382, 

 388, 402, 406, 418; shell- 

 glands, 405; specific char- 

 acteristics, 431. 

 urna, 360, 361, 363. 365. 371, 

 372, 374, 386, 377, 378, 

 379, 380, 3SS. 492, note, 



424; absence of spines fr 



lateral margin, 378; speci- 

 fic characteristics. 431. 

 urna var., 382; description of, 

 370; distribution of spines, 

 3S7, 388. 

 Haloeynthia haustor, 66, 69, * s , 

 96, plate 11; differences 

 between Haloeynthia john- 

 soni, 88, 94; distinguishing 

 characteristics, 93. 

 Haloeynthia johnsoni n. sp., a 

 Comprehensive Inquiry as 

 to the Extent of Law and 

 Order that prevails in a 

 Single Animal Species, 65; 

 bibliography, 97. 

 johnsoni, 66, 80, 96, plates 7- 

 14; age in relation to size 

 of animal, 78; branchial 

 apparatus, 68, 80; bran- 

 chial membrane, 68, plates 

 8, 12, 13, 14; branchial sac, 

 74. 89; branchial stigmata, 

 68, 76; branchial tentacles. 

 68, 78, 80; change in species 

 through adaptation, 89; char- 

 acters of, 93 ; differences 

 between Haloeynthia haus- 

 tor, 88, 94; differences in 

 habitat, 93; distinguishing 

 characteristics, 93; dorsal 

 languets. 68, 74. 76. 79; 

 their relation to size of ani- 

 mal, 77; embryo, prostig- 

 mata of, 75; environment 

 of, 93; ganglion of, 68; 

 gonadial lobes of, 80; 

 hypophysis of, 68, plate 

 10; intestinal tract of, 68, 

 72, 80, plate S; lacteal sys- 

 tem of, 68, 72, 80, plates 

 8, 9; laws and rules of 

 branching in, 70; liver of, 

 68, 72, plates 8, 9; mantle 

 of, 67; mantle musculature, 

 67, mi. plate 8; oviduct of, 

 80; protostigmata in larva 

 of. 79; menstrua of, 96; 



protostigmata of the em 

 bryo, 75; repetitive basis, 

 7s ; reproductive organs. 

 us, 73. plate 8; siphons of, 

 67; their color, 67; size in 

 relation to number of dor- 

 sal languets. 77; in rela- 

 tion to age. 7s ; sperm-duct, 

 so; stigmata, 68, 79; its 

 shape, 77; branchial stig- 

 mata, 78; stomach, 68, 72. 

 plate 9; substrata in, 96; 

 superficial characters, 67; 

 tentacles, 68, 69. 70, 71, 78, 

 s4. 96. plate 12; test. 6,, 

 69, plate 1 1 ; variation: 

 statistics of, 75; tables of, 

 76, opposite 76; values 

 tic in table 1, 76. 

 morns, 73. 

 superba, 74. 

 Harenactis attemiata. 116. 

 Harmer, S. F.. cited, 225. 226. 



22 7. 246, 252, 266. 

 Haswell, W. A., cited, 363, 376, 

 378, 379. 380, 388, 407, 423. 

 Ilerdman, W. A., cited, 66. 

 llertwig, cited, 87, 97. 

 Herzstein Research Laboratory, 

 Monterey, California, 356. 

 Hesse, < '. E., cited. 359. 

 Heteropora, 246, 257. 

 ,i, ozt alanica, 258. 

 pelliculata, 258. 

 Heterorlidbdus grandis, 331. 

 Hincks, Th., cited, 226, 236, 253, 



266. 

 Hindle, Edward, 127. 

 Hippa, 364. 



llohvay, R. S., cited, 204. 

 Homology, tests of, 82. 

 Hungerbiihler, M., cited, 402, 



note, 41S. 

 Hydranth and holdfast, Regen- 

 eration of, 295. 

 Hydrographie Problems of Ma- 

 rine Biological Station, 

 San Diego, 202; relation to 

 the biological work, 203. 

 Hydrographie Work carried on 

 by the Marine Biological 

 Station of San Diego, Pre- 

 liminary Report on, 189; 

 bibliography, 204. 

 Hydroids, 91. 

 Idmonea, 246, 252. 

 californica, 253. 

 Individual, law and order in, 85. 

 Inoculation, mechanical, 128. 



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