S| 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
VOLUME LII, PART II.— SESSION 1918-19. 
CONTENTS. 
The Development of the Heart in Man 
School, University of St Andrews, 
figures), ...... 
( Issued August 1, 1918.) 
By Professor D. Waterston, M.D., Bute Medical 
(With Eighteen Text-figures and Sixteen Plate- 
XIII. 
The Formation , Rupture, and Closure of Ovarian Follicles in Ferrets and Ferret-Polecat 
Hybrids, and some Associated Phenomena. By Professor Arthur Robinson, University 
of Edinburgh. (With Ten Plates), ....... 
(Issued September 18, 1918.) 
XIY. The Anatomy and Affinity of certain Rare and Primitive Ferns 
Thompson, M.A., D.Sc., Lecturer in Botany, Glasgow University, 
and Thirty Figures in the Text), . . 
( Issued September 9, 1918.) 
By John M'Lean 
(With Seven Plates 
EDINBURGH: 
PUBLISHED BY ROBERT GRANT & SON, 107 PRINCES STREET, 
AND WILLIAMS & NORGATE, 14 HENRIETTA STREET, COYENT GARDEN, LONDON, W.C. 2. 
257 
303 
363 
XY. The Correlation between Relatives on the Supposition of Mendelian Inheritance. By R. A. 
Fisher, B.A. Communicated by Professor J. Arthur Thomson. (With Four Figures in 
Text), . • . . . . . .399 
(Issued October 1, 1918.) 
XYI. The Prostate Glands of the Earthworms of the Family Megascolecidee. By J. Stephenson, 
D.Sc., M.B., Lieut.-Col. Indian Medical Service; Professor of Zoology, Government 
College, Lahore ; and Haru Ram, M.Sc., Professor of Zoology, Hindu University, 
Benares, late Demonstrator of Zoology, Government College, Lahore. (With One 
Plate), ........... 435 
(Issued April 15, 1919.) 
XVII. The Calciferous Glands of Earthworms. By J. Stephenson, D.Sc., M.B., Lieut.-Col. Indian 
Medical Service, Professor of Zoology, Government College, Lahore; and Baini Prashad, 
D.Sc., Assistant Director of Fisheries, Bengal and Bihar and Orissa, late Assistant 
Professor of Zoology, Government College, Lahore. (With One Plate and One Text- 
figure), ........... 455 
(Issued April 15, 1919.) 
XVIII. The Morphology of the Prosencephalon of Spinax as a type of Elasmobranch Fore-brain. By 
J. Stuart Thomson, M.Sc., Ph.D., Lecturer and Senior Demonstrator in Zoology in the 
Victoria University of Manchester. (With Two Plates and Three Text-figures), . . 487 
(Issued April 25, 1919.) 
MDCGCCXIX. 
Price Thirty Shillings. 
