495. _Polypterospermum Renaultii_; _Ptychotesta tenuis_; _Polylophospermum stephanense_; _Hexapterospermum stenopterum_; _Diplotesta avellana_; _D. Grand’Euryana_; _Taxospermum Grüneri_ 322 496. _Pachytesta incrassata_; _Polypterocarpus anglicus_ 324 497. _Pachytesta_ 325 498. _Codonospermum olivaeforme_; _Aetheotesta elliptica_ 330 499. _Samaropsis emarginata_ 337 500. _Cardiocarpus drupaceus_ var. _expansus_ 339 501. _Cardiocarpus sclerotesta_; _Rhabdocarpus cyclocaryon_ 340 502. _Samaropsis fluitans_; _S. emarginata_; _S. bicaudata_; _S. Seixasi_; _S. barcellosa_; _S. Newberryi_; _Cordaicarpus Cordai_ 350 503. _Samaropsis Leslii_ 352 504. _Samaropsis Milleri_. [Geol. Surv. India.] 353 505. _Cordaicarpus Cordai_ 355 506. _Holcospermum sulcatum_; _Codonospermum anomalum_; _Diplopterotesta spitzbergensis_; _Gnetopsis elliptica_; _Thysanotesta sagittula_; _Rhynchogonium costatum_; _Boroviczia Karpinskii_; _Hexagonocarpus Noeggerathi_; _Rhabdospermum tunicatum_ 359 507. _Cycadeoidea marylandica_. [G. R. Wieland.] 373 508, 509. _Cycadeoidea Wielandi_ [G. R. Wieland.] 375, 376 510. _Cycadeoidea_ sp. 377 511. _Cycadeoidea Gibsoniana_ 377 512. _Cycadeoidea ingens_. [G. R. Wieland.] 378 513–515. _Cycadeoidea_. [G. R. Wieland.] 380–383 516. _Cycadeoidea Dartoni_ 384 517–523. _Cycadeoidea Gibsoniana_ 387–394 524–527. _Cycadeoidea_ (_Bennettites_) _Morierei_. [O. Lignier.] 397–402 528–532. _Cycadeoidea dacotensis_. [G. R. Wieland.] 404–408 533. _Cycadeoidea colossalis_. [G. R. Wieland.] 410 534. _Cycadeoidea Reichenbachiana_. [A. Rothpletz.] 411 535–537. _Cycadeoidea gigantea_. [Geological Soc.] 413, 414 538. _Cycadeoidea micromyela_ 415 539. _Cycadeoidea Jenneyana_ (_?_) [G. R. Wieland.] 416 540. _Vectia luccombensis_. [Trustees of the British Museum.] 419 541–543. _Williamsonia gigas_ 424–427 544. _Williamsonia gigas_. [Yorkshire Nat. Union.] 428 545. _Williamsonia gigas_. A. G. Nathorst. 429 546, 547. _Williamsonia gigas_ 430, 431 548. _Williamsonia gigas_. O. Lignier. 432