CARADOCIAN CYSTIDEA FROM GIRVAN. 



525 



"extension-plane," 25. 



extinction of specialised Cystidea, 614. 



Fl, 7; see Lyckholm beds. 



faberi, Platycystis, 37, 562, tf. 5. 



Fearnsides, W. G., 7, 467, 615. 



jUitexta, Pleurocystis, 350, 367, 368, 369, 378, 380, 



385, 390, 414, ^15, 420, 425, 426, 431, 551, 



552, 553, 577, tf. 62, 68. 

 flexible integument, 604, 605. 

 folded (? valvular) plate, Dendrocystis, 57. 

 folds of pectinirhombs, Pleurocystis, 378 ; P. gibba, 



529; P. quadrata, 510; P. rugeri, 455. 

 forbesi, Cheirocrinus, 292, 307, 308. 



Glyptocystites, 307. 



foriolus, Pleurocystis, 380, 383, 390, 499, 519, 534, 



535, 551, 552, 553, 577, PI. vi. ff. 75-81, tf. 



74, 75, 80. 

 frame, Cothurnocystis, 163; C. curvata, 212; 



C. elizae, 174. 

 Fbitsch, a., 12. 



geography, Ordoviciaii, 566-568. 



geomalic growth, 233, 582. 



gibba, Pleurocystis, 378, 390, 499, 519, 520, 551, 

 552, 553, 577, PI. vi. ff. 64-68, tf. 71. 



giganteus, Cheirocrinus, 301, 307, 308, 334. 



Gonocrinites, 307. 



gigas, Rhipidocystis, 35, tf. 1, 2, 4. 



Ginetz, 87, 589. 



Girvan strata, 4. 



Glaphyrocystis, 269, 281, 559, 595 : compressa. 



globiceps, Staurocephalus, 6. 



Glyptocystidae, 262, 26+, 267, 276, 284, 577. 



Glyptocystidea, 10, 577; archetype, tf. 36, 37; 

 bionomics and morphology, 595; diagnosed, 

 282. 



Glyptocystidean plate, 4. 



Glyptocystinae, 269, 271, 276. 



Glyptocystis, 269, 273, 276, 277, 281, 289, 375, 

 577, tf. 38 ; habit, 597 : multipara. 



gonopore, Cothurnocystis, 244; Dendrocystis, 76. 



Gornaja Scheldicha, 36. 



grandis, Strophomena, 6. 



granulatus, Cheirocrinus, 307, 308, 601. 



gravity, relations to, 581, 582, 584. 



Gray, E. (MrsK), 1, 8, 12, 170, 392, 615; collec- 

 tion, 1, 8. 



Greifswald Univ., 35. 



Gbindrod collection, 447. 



GuRLEY, W. F. E., 362, 438, 443, 615. 



gut, CAeirocnVms, 384; Cothurnocystis, 2i2; Pleuro- 

 cystis, 384; relation to pectinirhombs, 606, in 

 Pleurocystis, 557, 558. 



habit, of Ceratocystis, 259 ; of Cheirocrinus, 306 ; 

 of Cothurnocystis, 231 ; of Pleurocystis, 376 ; of 

 Trochocystis, 251. 



Haeckel, E. H. p. a., 39, 40, 57, 69, 72, 74, 76, 

 229, 250, 286, 289, 348, 350, 363, 403, 414, 

 615. 



Hajek, 90. 



Hall, J., 286, 355, 615. 



Hallicystis, 269, 281. 



Hartfell Shales, 7. 



Haverfordwest, 446. 



Heliocrinus, 559. 



Hemicosmites, 352, 353, 559. 



Herault, 43, 253, 561, 587. 



Herouard, E., 40, 615. 



Heterostelea, 10, 18, 19, 20, 576; bionomics, 581 ; 

 classification, 26; diagnosed, 21; families ac- 

 cepted, 32. 



HoERNES, R., 357, 615. 



Holm, G., 12, 468. 



Homocystis, 281, 290, 577 : alter. 



HoRNB, J., 4, 6, 8, 12, 392, 567, 615. 



Hudson R. group, 435. 



Hughes, T. McK., 12, 449. 



Hull, P.Q., 405, 406, 410, 416, 422. 



Huxley, T. H., 615. 



Hyatt, A., 582, 615. 



hydropore, Cheirocrinus constrictus, 323 ; Cothurno- 

 cystis, 244 ; Dendrocystis, 76, 80 ; Pleurocystis, 

 379 ; see also madreporite. 



hypostereom, Dendrocystis, 54, 56. 



Illaenus howmanni, 6. 



insignis, Cheirocrinus, 307, 308, 601. 



"intake," 24; of Ceratocystis, 258; of Cothurno- 

 cystis, 225 ; see also subvective system. 



integument, flexible, 604, 605 ; of Cothurnocydis, 

 163, 168 ; of C. curvata, 217 ; of C. elizae, 191. 



internal anatomy, Ceratocystis, 258 ; Cothurnocystis, 

 241. 



interruptus, Gheirocri7ius, 303, 307, 308, 336, 337, 

 560, 564, 577, 601, PI. iv. f. 48, tf. 59. 



Irregularia, 264, 265, 266, 577. 



ites, termination, 11. 



Jaekel, O., passim. 



"Stammesgeschichte," 268. 



Jaekelocystis, 281. 

 jamesi, Acanthalepis, 309. 

 Jones, 0. T., 447. 



Katzer, F., 7, 615. 

 Keisley Limestone, 7, 467, 559. 

 Kildare Limestone, 7. 

 Killey Bridge beds 7, 467. 



