174 



INDEX TO THE PORIFERA 



Lymnorea, 111 



Lyssaciua, 1,3, 116,119,156 



— diagnosis ami classitica- 

 tiou, 121-123 



Maas, 49, 57, 80-82, 96, 

 107, 144 



JIacutidreicict, 149 



macromeres, 80 



Maeandrospongidae, diag- 

 nosis and genera, 124 



Magog, 150 



Malaajsaccus, 122 



maltha, 51 



Mantel], 7 



mantle of spongoblasts, 46, 

 141 



MurgariteUu, 124 



marginalia, 118 



Marshall, 142 



Marshcdlia, 124 



massive sponges, 22 



Masterman, 57 



Mastosia, 149 



maturation of ovum, 61 



Megalith ista, 149 



Meganiorina, 149 



megascleres, 100, 130, 137 



— flefinition of, 39 

 Mclmlenna, 152 

 MelUttiiiH idae, diagnosis 



and genera, 124 

 McUonympha, 122 

 Mi'lonanchora, 152 

 Mcionella, 149 

 membrana reticularis, 121 

 Menanctia, 151 

 Merejkowsky 44 (footnote) 

 mesoderm, 63, 73, 81, 85 

 mesogloea, 51, 86 

 mesotriaenes, 146 

 metanioriihosis, 69, 81, 84 

 Metschnikoir, 73, 80, 82, 



85, 86, 165 

 Metschnikowia, 151 

 Meyenia, 152 

 Mcyeninae, diagnosis and 



genera, 151, 152 

 microealthrops, 134 

 M icrociona, 1 52 

 micromeres, 80 

 iiiierorliabdus, 134, 135 

 microscleres, 100, 130, 137, 



138 

 — delinition of, 39 

 Microsclerophora, diagnosis 



and chissiticatiun, 147 

 Microtriaenosa, diagnosis 



and classification, 146, 



147 

 MkrotylotcUa, 152 



Miklucho-Maclay, 64 



Minchin, 57 



monactinal spicules, 38, 

 116, 137 



monaene, 133 



Monukidue, 123 



Miiiianchora, 152 



monaxon spicules, 38, 116, 

 133, 137, 163 



Monaxonida, 1, 3, 23, 24, 

 26, 80, 145. 146, 156, 

 157, 163 



— diagnosis an<l classifica- 

 tion, 150-153 



— skeleton of, 137-140 

 Monoceratiua, 153 

 ;nonocrepid, 135 

 Monocre})idiuin, 149 

 monolophous, 134 

 morphogenesis, 73, 81 

 multipolar immigi-ation, 75 

 MyliKsia, 124 

 myocytes, 44, 62, 144 

 Myriastra, 148 

 MyrmecUnn, 111 

 Myxdla, 152 

 Myxospongida, 1, 26, 52, 



145. 146, 164 



— diagnosis and classifica- 

 tion, 154 



Xematrinion, 149 

 JVeopeltidae, diagnosis and 



genera, 149 

 XeojjeUis, 149 

 A'^eosiphonia, 148 

 nephrocytes, 57 

 nervous system in sponges, 



46, 87 

 networks in gastral cavity, 



48, 96 

 Mpterel/a, 150 

 N.ildeke, S3. 158, 159 

 non - articulated tubar 



skeleton, 105 

 Nudil)ranchs, feeding on 



sponges, 88 

 nutrition, 85 



Oceanajiia, 152 

 octactinal spicules, 155 

 Octactinellida, 154, 155, 

 157, 162 



— diagnosis and cla.ssifica- 

 tion, 156 



Odd ispongia. 111 

 odour of si)Oupes, 26 

 Oligosilicina, diagnosis and 



classification, 1-17 

 Olyntlius. 3, 7, 8, 64, 90, 



92. 103. 104, 126, 161 



Olynthus, anatomy and his- 

 tology, 26 



Onclwdadinae, 149 



Onaisella, 123 



oogenesis, 61 



Ophirhaphidites, 148 



OpldUanpotigia, 152 



Ophrysloma, 124 



organic axis of spicules, 40, 

 100 



organogeny. 81 



orthotriaene. 133 



Oscarella, 44, 49, 64, 127, 

 145, 147, 154, 160, 164 



Oscardliduc, 146, 164 



— diagnosis and genera, 

 154 



oscular rim, 27, 93 



— tubes, 93 



osculum, 3, 27, 35, 72, 85, 



87 

 ostia. 33, 36, 48, 85, 97, 



127, 129 _ 

 overgrowth, 71 

 oxeote spicules, 101, 137 

 oxyaster, 134 

 oxyhexactine, 117 

 oxyhexaster, 117 



Pachastrelln, 147 

 I'acliastrdUdae, diagnosis 



and genera, 147 

 Padiinion, 150 

 I'adiydudina, 151 

 J'adiymatisma, 148 

 l'adiyj)(iterii>n, 149 

 I'achyteidiisma, 125 

 I'adiytUodia, 111 

 I'alaeomanon, 150 

 Palaeosaccus, 123 

 palpocils, 47 

 J'apyrida, 148 

 Parazoa, 159 

 parenchyma, 31, 51, 85, 



120 

 parenchymal skeleton, 106, 



119 

 parenfhvnialiiv, 119, 167 

 l>arenchymula, 69, 75, 80, 



145 

 parietal gaps, 37, 116 

 Parmida, 152 

 partlienogenesis, 67 

 Pattersimia, 123 

 Pattersonidac, 123 

 peduncle. 3 



peduncular skeleton, 105 

 j)edunculate sponges, 4 

 I'ekelharing, 55, 57, 85, 87 

 IK'lapic larvae, 73 

 Pdiina^ 151 



