TRANSACTIONS 



OF THK 



ROYAL SOCIETY OF EDINBURGH. 



VOLUME LI, PART III.— SESSIONS 1915-16-17. 



O N TENT S. 



^SaB^Hvsii 



XIIT. Contributions to the Geology of Behyuella. By Professor J. W. Gregory, F.R.S., D.Sc. 



(With Two Plates), . . - • • • • .495 



(Issued August 11, 1910.) 



XIV. .1 Contribution to the Petrography of Benguella, based on a Rock Collect 'ion made by 



Professor ■/. W. Gregory. By G. W. Tyrrell, A. R.C.Mr., F.G.S., Lecturer in Geology, 

 Glasgow University. Communicated by Professor J: W. Gregory, F.R.S. (Willi One 

 Plate), ........... 537 



{Issued August 11, 1916.) 



XV. On some Cretaceous Bear It input I a and Mollusca /row, Angola, Portuguese West Africa. By 



K. Bollen Newton, F.G.S., Geological Department, British Museum. Communicated 



by Professor J. W. Gregory, F.R.S. (With Two Plates), .... 561 



(Issued Auyust 14, 1916.) 



XYT. Note on an Algal Limestone from Angola. By Mrs M. F. Romanes, late Harkness Scholar, 

 Newnham College, Cambridge. Communicated by Professor J. W. Gregory, F.K.S. 

 (With One Piute), ., . . . . .581 



(Issued April 25, 1916.) 



XVII. On some Cretaceous Eehinoidea from the Neighbourhood of Lobito Bay. By Professor J. W. 



Gregory, F.R.S., D.Sc, ......... 585 



(Issued August 21, 1916.) 



XVIII. Contributions towards, a Knowledge of the Anatomy of the Lower Dicotyledons. I. The 

 Anatomy of the Stent of the Papaveraceae. By K. J. Harvey-Gibson, D.L., M.A., Pro 

 le.s.MU' of Botany, University of Liverpool ; and Minnie Bradley, M.Sc, Hartley Research 

 Scholar, University of Liverpool. (With Three Plates), ..... 589 



(Issued September 16, 1916.) 



NIX. Aproclodcidus ieretipes : A new Oxfordian Plesiosaur in the Hunterian Museum, Glasgow 

 Uuioersity. By William R. Smellie, M.A., B.Sc. Communicated by Professor J. W. 

 Gregory, D.Sc., F.R.S. Edim and Lond. (With One Plate), . . . .609 



(Issued Auyust 29, 1916.) 



XX. The Anatomy and. Affinity of Platyzoma microphyllum, R. Br. By John M'Lean Thompson, 

 M.A., B.Sc, Chief Assistant in Botany and Robert Donaldson Research Scholar, Glasgow 

 University. Communicated by Professor Bower, F.R.S. (With Four Plates), . . 631 



(Issued November 6, 1916.) 



XXI. On Leaf-Architecture as illuminated by a Study of Pteridophyta. By F. O. Bower, D.Sc., 



F.R.S., Regius Professor of Botany in the University of Glasgow. (With One Plate), . 657 



([.-■sued November 8, 1916.) 



XXII. Contributions to our Knowledge of British Paleozoic Plants. Parti. Fossil I' I ants from the 



Scottish Coal Measures. By Dr R. Kidston, F.R.S. (With Three Plates), . 7u9 



(Issued November 2d, 1916.) 



XXI II. A Revision of the British Idoteidx, a Family of Marine Isopotta. By Walter E. Collinge, 



D.Sc, F.L.S., etc., Research Fellow of the University of St Andrews. Communicated by 

 Professor M'INTOSH. (With Eleven Plates), ...... 721 



(Issued January 17, 1917.) 



XXIV. On (ft'l Red Sandstone Plants showing Structure, from the Rhynie chert Bet/, Aberdeenshire. 



Part I. Rhynia Gwynne-Vaughani, Kidston and Lang. By R. Kidston, LL.I)., F.R.S., 

 and W..1I. Lang, D.Sc, F.R.S., Parker Professor of Cryptogamic Botany in the University 

 of Manchester. (With Ten Plates), . . . . . . .761 



(Issued February 27, 1917.) 



XXV. The Prothallus of Tmesipteris Tannensis. By Professor A. Anstruthkr Lawson, D.Sc, 



F.L.S. (With Three Plates), ........ 785 



(Issued April, 21, 1917.) 



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