SUMMARY OF CURRENT RESEARCHES 



RKLATING TO 



ZOOLOGY AND BOTANY 



(principally invertebrata and cryptogamia), 



MICROSCOPY, Etc.* 



ZOOLOGY. 



VERTEBRATA. 

 a. Embryology. t 



Structure of Mammalian Ovary. J — H. von Winiwarter and 

 G. Sainmont find smooth muscle tissue in the ovary of the cat. It 

 retains the character of young tissue. It occurs only in the parenchy- 

 matous zone in the vicinity of growing follicles, to which it forms an 

 external theca. The latter persists, after the follicle bursts, as the 

 capsule of the corpus Inteum. In the mesovarium there is much greater 

 muscularity : longitudinal bundles in two planes. These effect erection 

 of the ovary at the time of rut. The authors also describe a principal 

 and an accessory ganglion associated with the epoophoron, which have 

 probably to do with the innervation of the ovary. 



Ovarian Glands. § — P. Bouin and P. Ancel distinguish Mammals 

 with spontaneous ovulation, and Mammals in which the ovulation is 

 provoked by copulation. The former have two kinds of corpus luteum, 

 according as the ovulation is not, or is, followed by fertilisation — the 

 periodic corpora lutea of menstruation, and corpora lutea of pregnancy. 

 Mammals, with non-spontaneous ovulation, have only the second kind 

 of corpus luteum — the gestative corpus luteum. To the first category 

 the authors refer man, primates, dog, horse, cow, pig ; to the second, 

 the rabbit, the guinea-pig, the mouse, and the cat. The ovaries of the 

 first set have no interstitial gland, and it may be said that the periodic 

 corpus luteum corresponds to the interstitial gland which occurs in 

 Mammals of the second set. 



In another paper || the authors maintain that the phase of cellular 

 proliferation in the mammary gland is determined by corpus luteum. 



* The Society are not intended to be denoted by the editorial " we," and they 

 do not hold themselves responsible for the views of the authors of the papers 

 noted, nor for any claim to novelty or otherwise made by them. The object of 

 this part of the Journal is to present a summary of the papers as actually pub- 

 lished, and to describe and illustrate Instruments, Apparatus, etc., which are 

 either new or have not been previously described in this country. 



t This section includes not only papers relating to Embryology properly so 

 called, but also those dealing with Evolution, Development, Reproduction, and 

 allied subjects. % Arch. Biol., xxiv. (1909) pp. 627-51 (1 pi. and 7 figs.). 



§ C.R. Soc. Biol. Piiris, lxvii. (1909) pp. 464-6. || Tom. cit., pp. 466-7. 



Feb. 16th, 1910 c 



