112 Proceedings of the Royal Physical Society. 



IX. The Anatomy of the Genito-urinary Apparatus of the 

 Adult Male Porpoise (Phocoeua communis), as displayed 

 by the Formal Method. By David Hepburn, M.D., 

 F.RS.E., Professor of Anatomy, University College, 

 Cardiff, and David Waterston, M.A., M.D., F.E.S.E., 

 Lecturer on Eegional Anatomy, University of Edin- 

 burgh. [Plate II.] 



(Read 22iid December 1902.) 



Introductory. — The specimen upon which the present 

 research has been conducted has already provided us with 

 material for observations upon the pelvic cavity of Cetacea, a 

 detailed examination of the alimentary viscera, and a study 

 of the minute anatomy of its spinal cord.^ In each of these 

 investigations the results were of a sufficiently novel and 

 interesting character to warrant further inquiry into other 

 groups of organs, even where at first sight there might not 

 appear great promise of new facts, by reason of the number 

 of existing published descriptions. Notwithstanding the 

 amount of work which has already been done by former 

 observers, we are of opinion that a new series of observations 

 on the genito-urinary organs was warranted, first, because of 

 the fact that, so far as we are aware, the Formal method has 

 not hitherto been applied to the study of Cetacea; and, 

 second, because the great majority of adult porpoises hitherto 

 examined in detail appear to have been females. 



So recently as 1898, Wilhelm Daudt- examined three male 

 foetuses of different sizes, and four adult females of Phocoena 

 communis, as part of a more extended research; but the facts 



^ The following are the papers referred to: — Hepburn and Waterston, 

 " The True Shape, Relations, and Structure of the Alimentary Viscera of the 

 Porpoise {Plwccena communis) as displayed by the Formal method," Trans. 

 Roy. Sac. Eclin., vol. xl. pt. 2 (No. 16). Hepburn and Waterston, "The 

 Pelvic Cavity of the Porpoise as a Guide to its Sacral Region," Trans. 

 British Assoc. (Glasgow Meeting). Hepburn and Waterston, "A Compara- 

 tive Study of the Grey and White Matter and of the Motor Cell Groups in 

 the Anterior Horns of the Spinal Cord of the Porpoise," Journal of Anat. 

 and Phys., vol. xviii. pts. 2 and 3, 1904. 



" Wilhelm Daudt. " BeitrJige zur Kenntnis des Urogenitalapparates der 

 CQidiCQeu,''^ Jenaische Zeitschriftfiir Naturwissenschaft, vol, xxxii., 1898. 



