20 Gen. Sub. 
GENERAL SUBJECTS. 
[ELecker, V.] Die Richtungskorperbildung bei Cyclops und Cantho- 
camptus. Ber. Ges. Freiberg, vi, pp. 30-32. 
Hancock, J. L. Triple Fertilisation in Egg of Domestic Fowl. Am, 
Nat. xxv, p. 1030. 
Hartog, M. M. [See “ Sex and Reproduction.”] 
On nature of fertilisation. 
Henking, H. [See “ Spermatogenesis.”] 
Heymons, R. Die Entwicklung der weiblicken G eschlechtsorgane von 
Phyllodromia ( Blatta ) germanica , L. Z. wiss. Zool. iiii, pp. 434-53G, 
3 pis. 
IIoll, M. Ueber die menschlicbe Eizelle. Anat. Anz. vi, pp. 551-550, 
4 figs. 
Oppel, A. Die Befruchtung des Reptilieneies. T. c. pp. 536-544, 4 figs. 
°Paladino, G. Des ponts intercellulaires entre l’oeuf ovariquo et les 
cellules du follicule, formation de la zone pellucide. J. Microgr. xv, 
pp. 79-84. 
ROckert, J. Zur Befruchtung des Selachiereies. Anat. Anz. vi, pp. 
308-322. Cf. Verb. Anat. Ges. 1891, pp. 253 & 254. 
Merocytes of Selachian ovum are, in great part at least, supernumerary 
sperm-nuclei, for physiological polyspermy occurs. 
Schottlaender, T. Beitrag zur Keuntniss der Follikelatresie nebst 
einigen Bemerkungen fiber die unveranderten Follikel in den Eier- 
stocken der Safigethiere. Arch. mikr. Anat. xxxvii, pp. 192-238, 
2 pis. 
Degeneration of the follicle is an almost uniform process in the ovaries 
of the guinea-pig, rat, mouse, and dog. First the ovum degenerates, 
then the epithelium ; before the latter disappears there is remarkable 
proliferation in the theca. 
Yejdovsky, F. Bemerkungen zur Mitteilung H. Fol’s “ Contribution a 
l’histoire de la fecondation.” Anat. Anz. vi, pp. 370-375. 
Vejdovsky’s “periplasts” (1886) = attractive spheres; central cor- 
puscles = daughter periplasts. The periplast arises independently of the 
sperm-cytoplasm ; daughter periplasts appear endogenously within it. 
In Rhynchelmis there is no “ marche du quadrille.” 
Watase, S. Studies on Cephalopoda, i. Cleavage of ovum. J. Morph, 
iv, pp. 247-302, 4 pis. 
Bilateral character of segmenting ovum. Details as to karyokinesis, 
archoplasmic filaments, &c. 
Weismann, A. [See “Sex and Reproduction.”] 
On amphimixis, reduction-divisions, &c. 
