616 
Proceedings of the Royal Society of Edinburgh. [Sess. 
Fig. 3. — Diagram of male urogenital organs, showing testis, caudal liga- 
ment, gubernaculum, prostate, Dominant : appendix testis (Muller’s 
duct), and prostatic utricle, Recessive and on female type (Bonnet). 
6. Vas deferens. 
In 2 and 3 the differentiated sexual organs are shown, arising from '•a 
hypothetical common type in fig. 1. 
LITERATURE. 
Adami, J. G., “The Principles of Pathology,” Oxford Medical Publications. 
1909, Oxford, Henry Frowde. 
Adami remarks, apropos of the Differentiation of Sex : “ The existence in the 
normal male or female of useless rudiments of parts characteristic of the opposite sex, 
must not be taken as an indication that man is descended from an originally her- 
maphrodite ancestry. . . . Rather such rudiments are, in Mendelian terminology, 
recessive features, due to the origin of the fertilised ovum from both male and female 
germ-plasma” (pp. 257-8). 
Ahlfeld, Die Missbildungen des Menschen, I. Abschnitt, Leipzig, Gronow, 1880. 
Ballantyne, J. W., Antenatal Pathology and Hygiene , the Foetus and. Embryo , 
A Manual of , Edinburgh, Green & Sons, 1902 and 1904. Two vols. 
Bateson, W., Mendel’s Principles of Heredity , Cambridge, University Press, 1909. 
Bateson, Materials for the Study of Variation , London, Macmillan & Co., 1894. 
Bateson, The Methods and Scope of Genetics , Cambridge, 1908. 
In discussing Doncaster’s results as to the crossing of varieties of the currant- moth, 
Professor Bateson remarks : “If we are right, as I am strongly inclined to believe, we 
get a glimpse of the significance of the popular idea that in certain respects daughters 
are apt to resemble their fathers, and sons their mothers — a phenomenon which is 
certainly sometimes to be observed” (p. 44, Genetics , etc.). 
Beard, “The Germ-cells,” Parti., Raja Batis, Part I. contd., Journ. of Anat. and 
Phys ., 1904, pp. 82 and 341. 
Boveri, “ Befruchtung,” Merkel und Bonnet’s Ergebnisse, vol. i., 385-585. 
Carey, “Report of Two Testicular Teratomata, with a Review of the Recent 
Literature,” Johns Hopkins Hosp. Bull., vol. xiii., A T o. 140, 1902. 
