ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 541 



Plasma Cells in Human Gasserian Ganglion.* — E. Meyer directs 

 attention to the occurrence of numerous plasma-cells in the apparently 

 quite normal Gasserian ganglion. They are quite similar to those which 

 occur in inflammatory and degenerative conditions. It is possible that 

 they may be auxiliary cells mediating between the blood and the 

 intensely active ganglion cells. 



Histology of Sex Cells.f — E. Sjovall finds that the so-called 

 " Binnennetz " of Golgi and Kopsch, occurring in the spinal ganglion 

 cells, are by no means confined to them, but are frequent m other types 

 of cell during the whole embryonic period. He has investigated this 

 " Binnennetz " in the sex-cells of white mice during spermato- and 

 ovogenesis. The net appears topographically to have an intimate con- 

 nection with the idiosome, but is really different in character and 

 independent in development. Its significance is by no means clear, yet 

 it is undoubtedly important. It is transmitted to the cells of the neT\ 

 generation from the ovum only — the male sex-cell taking no part in its 

 formation. 



Ciliated Epithelium in Human Papillae vallatae.} — F. Heiderich 

 describes several cases in which he has found a many-layered epithelium 

 about 54 fx thick, bearing cilia 10-12 fi in length on the papillae vallatae. 

 This epithelium was limited to a small space and occurred only on quite 

 protected places. It had no relation to the minute glands lying in and 

 under the papillae. 



Fat Cells in Acipenser.§ — A. Nemiloff describes these cells in 

 Acipenser ruihenus. Of particular interest is a protoplasmic network 

 penetrating throughout the cells which the author is certain is not an 

 artifact. This network in fat-cells, it appears, has not been observed in 

 other vertebrates. 



Structure of Vagina and Uterus in Mammals. || — K. Beiling 

 gives a detailed account of the structure, both micro- and macroscopic, 

 of the mammalian vagina and uterus. A wide range of types has been 

 examined, viz. : mole, rat, rabbit, guinea-pig, dog, cat, pig, goat, ape, 

 etc. Only a few of his results can be given. The wall of the genital 

 canal — vagina, uterus, and tubes — consists of three layers, a mucous 

 membrane, muscularis, and serosa. This last is absent on a part of the 

 vagina. There is no submucosa. Vagina, cervix, and tubes are devoid 

 of glands. The corpus and cornua uteri possess the long uterine glands ; 

 in Carnivora at the period of sexual attraction, smaller glands, the 

 so-called crypts, arise. A periglandular lymph space around the uterine 

 glands is not present. The epithelium of the vagina is simple or 

 stratified, passing over gradually into the one-layered cylindrical 

 epithelium of the uterus and tubes. Mucus occurs only in the epi- 

 thelium of the cervix canal ; special mucus-forming cells or glands are 

 absent, so that the surface epithelium must be regarded as the place of 

 its formation. 



* Anat. Anzeig., xxviii. (1906) pp. 81-3 (1 pi.). 



t Tom. cit., pp. 561-79 (5 figs.). J Tom. cit., pp. 315-16. 



§ Tom. cit., pp. 513-22 (6 figs.). 



ll Arch. Mikr. Anat., lxvii. (1906) heft 4, pp. 573-637 (1 pi.). 



