76 QUARTERLY CHRONICLE OF MICROSCOPICAL SCIENCE, 
Medical Record,’ 1874, p. 131) a long and elaborate paper 
on various points on the anatomy and physiology of the 
skin. 
XII. Urinary and Sexual Organs.—1. On the Structure and 
Movements of Spermatozoa.— By Th. Eimer (‘ Verhandl. der 
Phys. Med. Gesellschaft in Wurzburg,’ vol. vi, p. 93). 
2. On the Structure and Development of the Ovary and 
Wolffian Duct.—By G. Romiti (‘ Arch. f. Micr. Anatomie,’ 
1874, No. 2). 
3. Anatomy and Histology of the Testicle.—V. von Mihal- 
kovics (‘ Bericht der Math.-phys. Classe der Ko6niglichen 
Sachs. Gesellschaft der Wissensch.,’ 1873), under the direc- 
tion of Ludwig and Schwalbe, has investigated the course, 
structure, and contents of the seminal tubes, the interstitial 
tissue of the testicle, and the lymph-vessels and the blood- 
vessels of the testicle and epididymis. Besides those of the 
human subject, the testicles of the rabbit, guinea-pig, rat, 
mouse, dog, cat, hedgehog, boar, goat, bull, and several birds 
(pigeons, &c.), were examined. The paper is beautifully 
illustrated with several coloured plates. The author has 
arrived at the following conclusions: 
(1.) The convoluted tubules form a network by dividing 
dichotomously. The terminal branches arising from this 
division are connected together by loops. No bud-like dila- 
tations of the wall of the seminal tubes are to be found in 
the cortical layer of the human testicle. The author thus 
disposes of the view that the convoluted seminal tubes arise 
by blind extremities, as supposed by Beale, Henle, Kolliker, 
and Sappey. j 
(2.) The tubuli recti are not simple prolongations of the 
contorted tubules, but excretory tubes, which lie in the tissue 
of the organ of Highmore and in the lower end of the septa. 
(3.) Supporting cells (Stiitzzellen) and germinal nets 
(Keimnetz) are artificial products. They owe their origin 
to the coagulation of a tough substance, rich in albumen, 
which lies between the seminal cells. On the addition of 
hardening reagents, coagulation occurs, and a network appears 
between the seminal cells. 
(4.) The interstitial cells are constituents of the testicle, 
whose analogues are also to be found in other organs (coccy- 
geal and carotid glands and corpus luteum). 
(5.) The connective tissue of the testicle consists of finer 
and stronger bundles of connective tissue, which form net- 
works and are enveloped by endothelial cells. The mesh- 
spaces are in many places bridged over by their endothelial 
membrane, which then passes over to and becomes continuous 
