INDEX TO THE PORIEERA 



173 



Ileteroxi/a, 150 

 Hexaceratina. 146, 153, 154 

 hexactinal, 38, 116 

 Hexactinella, 124 

 hexactines, origin of, 162 

 Hexactinellida, 91, 1 1 1-125, 



156, 157, 161-164 

 Hexculella, 145, 154 

 Hexactinellitls, 40 

 hexaster, 117 

 Hexasterophoia, diagnosis 



and classification, 121, 



122 

 Higginsia, 153 

 Himalella, 111 

 Hinde, 154, 157, 162, 165 

 Hindia, 150 

 Hindiadae, 150 

 Hircinia, 142, 153 

 hispid cortical skeleton, 



105 



— dermal skeleton, 136 

 hispidating spicules, 136 

 histocytes, 62, 73, 84 

 Hisloderma, 152 

 histogenesis, 73, 80 

 histology, 43-63 



— of Olyuthus, 27 

 Holascinat', 119 



— diagnosis and genera, 

 122 



Holascus, 119, 122 

 Ilolasterella, 123 

 lIolc()sj)ongia, 111 

 holoblastic segmentation, 



67, 68 

 Ilolodidyon, 149 

 Uolopso.mina,, 154 

 llnloxea, 150 

 Hmnaeodictya, 152 

 Humandra, 110 

 lloiiuxslerina, diagnosis and 



genera, 148 

 Homocoela, 1, 109, 164 



— canal system, 92-96 



— diagnosis and classifica- 

 tion, 110 



— skeleton of, 103-105 

 homogeneous spongin fibres, 



140 

 Ifoiaorrhaphidae, 151 

 Hoplopliora, diagnosis and 



cla-ssilication, 148, 149 

 Hundeshageu, 42 

 Ilijalascus, 122 

 Illialonema, 41, 123 

 U i/alonematidae, 113, 115, 



117, 119, 121 (footnote) 



— diagnosis and genera, 

 123 



Hijcdonemalinac, 123 



Hyalospoiigiae. 1 

 llijuliistdia, 1 23 

 Ilyalostylufi, 122 

 Ilyalolraijiis, 150 

 Hydrozoa in sponges, 88 

 Jlyinrdesiiiia, 151 

 JJymeniacidon, 153 

 llymeraphia, 152 

 HyinerhatHlio, 152 

 hypodernialia, 119 

 bypophare, 126 



lanthella. 141, 154_ 

 immigration, 69, 75 

 impersonal condition, 21, 



91, 125 

 incrusting sponges, 22 

 incurrent canals, 32, 97, 



127 

 in<lividuality, 89 

 — loss of, 20, 91, 125 

 Inermia, diagnosis and 



classification, 124, 125 

 inhalant canids, 32 

 Inoholia, 1 1 1 

 intercanal system, 93, 96 

 intracellular spongin, 50 

 lophon, 152 

 lotrochota, 152 

 irregular type of skeleton, 



135 

 Ischadiles, 123 

 J sops, 148 

 Isoraijhinia, 149 



James-Clark, 54, 62, 89, 



158 

 Jerea, 149 

 Jereica, 150 

 Joruunn, 88 

 JoyeuxUi, 152 



Kaliapsis, 148 

 Kalpinella, 149 

 Kalykenteron, 152 

 Kazunia, 150 

 Keller, 43, 120, 137, 165 

 Keratosa. 1, 3, 24, 26, 78, 



80, 139, 145, 146, 156, 



157, 163 



— diagnosis and classifica- 

 tion, 153, 154 



— skeleton of, 140-144 

 Kirkpatrick, 168 

 Kornerzellen, 76 (footnote) 

 Krukenberg, 26, 42 



Lamonlia, 110 

 Lankester, 59 

 Lanvginella, 122 



LanuijinelliHuc, iliagnosis 



and geueni, 122 

 larva, 69, 73, 78, 89, 160 

 larvae of Demospongiae, 



144 

 Lasiodad ia , 1 5 3 

 lateral ray, 101, 105 

 Latrunculia, 151 

 Laxosuheriles, 151 

 Lecandio, 149 

 Lefniyelbt, 124 

 Leiodennatii'iii, 149 

 Lewdi/rellu, 150 

 Lelapia, 106, 110 

 Lendenfeld, 44 (footnote), 

 46, 47, 57 (footnote), 116, 

 141, 142, 156, 163, 165 

 Leptiiplirayma, 124 

 Leplosia, 152 

 Lessepsiu, 152 

 Aeucandra, 19, 48, 99, 110 

 Leucascus, 110 

 LeuciUa, 99, 110, 113 

 Leuckart, 62, 158 

 leuconoid type of canal 



system, 98-100, 167 

 Leucons, 90, 92, 96. 109, 



113 

 LeucopsaciiMC, diagnosis 



and genera, 122 

 Lencopsacus, 122 

 Leucosolenia, 17, 51, 56, 



110 

 Leucosoleiiiidae, 7, 48, 64, 

 75, 93, 94, 100, 101, 104, 

 105, 107, 145 



— diagnosis and genera, 

 110 



Levey ssu, 110 

 Licmosiuiim, 125 

 Lieberkiihn, 85, 86, 89, 



158, 164 

 lipogastry, 4 

 lipostoniy, 4 

 Lissodeiidoj-yr, 152 

 Lister, 166, 168 

 Lithisti.la, 41, 134, 135, 



157, 162 



— diagnosis and classifica- 

 tion, 148-150 



Lithoniiia, 109 

 LiUuniinae, diagnosis and 



genera. 111 

 Loisel, 49, 59, 86, 87, 89, 



143, 144 

 lopliocalthrops, 134 

 Lnphiicidyj-, 64, \'-- 

 loiiliotriaeue, 1 34 

 L iibom irskia, 151 

 Lujfuria, 154 

 Lyklium, 149 



