316 



INDEX. 



Helicostfegues (D'Orb.), 5, 171, 240 



Heterostegina, genus, 288-292 ; its history, 288 ; ex- 

 ternal characters, 288 ; internal structure, 289- 

 291; affinities, 291; geographical and geological 

 distribution, 292 



Ilymenocjclus (Bronn), 298 



Hyaline texture of shell of Foraminifera, 45, 46 



I. 



Impeeforata, Sub-order, Gl, C2. 



Intermediate skeleton 50-52 (see Supplemental Skeleton) 



Isomorphism of Foraminifera, 53, 54 



L. 



ia^eMff, genus, 15C-1 59 ; its history, 156-159 ; external 

 characters and internal structure, 157, 158; mons- 

 trosities, 158; affinities, 158; geographical and 

 geological distribution, 159 



Lagenida, family, 150, 154-156 



Lagynis, genus, 65 ; encysting process in, 34 



Larvaria reticulata (Defrance), 132 



Lieherkuhnid, genus, 63 ; animal of, 28, 29 



Lingulina (D'Orb.), 163 

 — mutabilis, 164 



Lituola, genus, 143-145; its history, 143; external 

 characters and internal structure, 143, 144; 

 affinities, 145 ; geographical and geological dis- 

 tribution, 145 



LiTUOLiDA, family, 140 



LoBOSA, Order, 16, 23 



Lycophris dispansus (Sow.), 299 



Lycophris ephippium (Sow.), 299 



M. 



JIarginal Cord, of Xummulina, 269, 270 ; of Operculiua, 

 257, 258 



MarginuHn^ (D'Orb.), IGO, 163 



2Iiliola, genus, 74-82; its history, 74, 75; external 

 characters and internal structure, 75-81 ; varietal 

 forms, 77-81 ; affinities, 81 ; geographical and 

 geological distribution, 82 ; reproduction, 37 



ililola cyelostoma, 79 

 — saxorum, 80 



iliLioLiDA, family, 66 



Miliolina (Will.), 75 



jMiliolites (Lam.), 74, 75 



Millepora rubra (Lam.), 235 



Monostfegues (D'Orb.), 5 



Jlouothalamous Foraminifera, 41, 42, 49, 139 

 Jlonstrosities of Lagenida, 39, 158; of Orbitolites, 



123; of Cycloclypeus, 296 

 Multilocular Foraminifera, 41, 42, 49 



N. 



Nodosaria, sub-genus, 161; its varietal forms, 163, 



164 

 Nodosarina, genus, 159-166; its history, 159, 160; 



external characters, internal structure, and varietal 



form.s, 161,165; affinities, 165; geographical aud 



geological distribution, 165 

 Nonionina, sub-genus, 286 

 Nonionina asterizans, 286 



— buUoides (D'Orb.), 184 



— elegans (Will.), 252 



— faba, 286 



— limba, 286 



— sphfcroides (D'Orb.), 184 



— stellifera, 286 



— striato-punctata, 286 



Nuhecularia, genus, 69-72 ; its history, 69 ; external 

 characters, 69, 70; internal structure 70 ; varietal 

 forms, 7 1 ; affinities, 72 ; geographical and geologi- 

 cal distribution, 72 



Nummiilina, genus, 262-276 ; its history, 262-266 ; 

 external characters, 266-268 ; internal structure, 

 268-273 ; alar prolongations of chambers, 270-271 ; 

 canal-system, 272, 273 ; varieties, 273 ; affinities, 

 274 ; geographical distribution, 275 ; geological 

 distribution, 276 



Nummulina Biaritzensis, 271 



— complanata, 271 



— Cumingii, 266, 275 



— distans, 269 



— Garensensis, 271 



— Gyzehensis, 269 



— laevigata, 265, 271 



— Leymerii, 271 



— obtusa, 266 



— perforata, 266, 272 



— planulata, 267, 275 



— striata, 271 



— variolaria, 275 



— Verneuili, 271 

 NU5IMULINIDA, family, 238-241 

 Nummulites, see Nummulina 



0. 



Opercidina, genus, 247-262; its history, 217, 248; 

 external characters, 248-252; internal structure, 

 252-260; marginal cord, 257, 258 ; canal-system. 



