92 Dr. W. C. Williamson oh 



Syiiihofi. /'arts. 



D. 1\^ Lyginodendron Oldhaniium ; Heterangiuin Grievii. Phil. 



Trans., 1873. 



¥.. V. Asterophyllites with Sphenophylloid axis. Sphenophylluni. 



Volkmannia (subsequently Bo\vmanites)Dawsoni, Strobilus 

 of Asterophyllites (subsequently Paracalamostachys 

 Williamsoniana ; Weiss) Asterophyllites fruit (subsequently 

 Palreostachya pedunculata. (See Weiss. Steinkohlen- 

 Calamarien). Calamostachys Binneyana, Calamites verti- 

 cillatus. Root of Asterophyllites (afterwards Amyelon). 

 Phil. Trans., 1874. 



F. VI. Rachiopteris aspera (afterwards petiole of Lyginodendron 



01dhamium)Rachiopteris01dhamium,Rachiopteris duplex, 

 Rachiopteris Lacattii, Rachiopteris bibractensis, Anacho- 

 ropteris Decaisnii. Phil. Trans., 1874. 



G. VII. Myelopteris (MeduUosa of Cotta), Psaronius Renaultii, Kalo- 



xylon Hookeri. Phil. Trans., 1876. 



II. VIII. Rachiopteris corrugata, Fern Sporangia, Gymnosperma;- 

 Dadoxylon, Gymnospermous Seeds, Lagenostoma ovoides, 

 Lagenostoma physoides, Conostoma oblonga, Conostonia 

 ovalis, Conostoma intermedia, Malacotesta oblonga, 

 Trigonocarpon olivieforme, Hexapterospermun Nciggerathi- 

 Cardiocarpou anomalum, Cardiocarpon compressum. Car, 

 diocarpon acutum, Cardiocarpon Butterworthii, Polyptero- 

 spernium. Phil. Trans., 1877. 



I. IX. Astromyelon, subsequently A. Williamsonis, Calamites, Aste- 



rophyllites, Lepidodendron selaginoides, Lepidostrobus, 

 Macrospores, Rachiopteris rotundata, Rachiopteris cylin- 

 drica, Cordaites (?) epiderm, Lyginodendron (?) anomalum, 

 Lepidodendroid cortex, Oidospora anomala, Volkmannia (?) 

 parvula, Lepidodendron Spenceri. Phil. Trans., 1878. 



K, X. Arran Lepidodendron, subsequently L. Wunschianum, Lepido- 



dendron Spenceri, Heterosporous Lepidostrobus, Calamo- 

 stachys Binneyana, Rachiopteris insignis. Tylosis, 

 Rachiopteris robusta, Sporocarpon elegans, Sporocarpon 

 pachyderma. Sporocarpon asteroides, Sporocarpon 

 ornatum, Traquaria, Zygosporites (subsequently shewn 

 to be spores), Dadoxylon, Lagenostoma ovoides, Cardio- 

 carpon anomalum, Calcisphcera (Radiolaria; of Judd). 

 Phil. Trans., 1880. 



L. XI. Lepidodendron selaginoides, Lepidodendron Harcourtii. (The 



plant so named here is now designated L. fuliginosura. 

 (See Proceedings Royal Society, Vol. XLIL, p. 6). 

 Sligmarian rootlets. Medullary rays of I/Cpidodendron 

 selaginoides, Calamostachys Binneyana and C. Casheana, 

 Fungi. Phil. Trans., 1881. 



M. XII. Astromyelon Williamsonis, Psaronius Renaultii, Zygosporites 

 (in a Sporangium), Calamites, Lepidodendron, Halonia, 

 Sporocarpon ornatum, Salisburia Adiantifolia. Phil. 

 Trans., 1881. 



N. XIII. Ileterangium Tili^oides, Kaloxylon Hookeri. Phil. Trans., 

 1887. 



O. XIV. True fructification of Calamites. Phil. Trans., I'S.S^. 



^- XV. Rachiopteris Grayii. Rachiopteris Lacattii ; Calamostachys Bin- 



neyana, Rachiopteris hirsuta, Rhizonium verticillatum, 

 Rhizonium reticulatum, Pihizonium lacunosum. 



