24 Oen. Sub. 
GENERAL SUBJECT^. 
Fleisciimann, A. Die Entwicklung des Eies von Echinocardium cov- 
datum. Op. cit. xlvi, 2, pp. 131-142, 1 pi. 
Discussing especially the segmentation. 
Garnault, P. Recherches sur la structure et le d6veloppement do l’oeuf 
et de son follicule chez les Chitonides. Arch. Z. exp6r. (2) vi, 1, pp. 
83-116, 2 pis. 
Ovum arises from germinal epithelium lining ovary ; its only mem- 
brane is formed from the modification of sister-cells ; the inclosing vitel- 
line masses do not take part in forming the nuclei of the membrane ; the 
expansion and contraction of the vitelline masses — the highest known 
expression of amoeboid activity in the ovum. 
. Sur la structure des organes gcnitaux, Povog6neae et les premiers 
stades de la f6condation chez 1 'Helix asjiersa. C.R. cvi, pp. 675-678. 
Some minute anatomy. The follicle formed from the cells of the 
germinal epithelium. Polar globule formation described. The spermato- 
zoon penetrates the ovum at a vitelline expansion or cone of attraction. 
. Sur la signification des globules polaires d’apres Weismann. Rev. 
Sci. x-ii, pp. 576-578. 
. Sur les phenomenes de la fecondation chez V Helix aspcrsci et 
V Avion empiricorum. Zool. Anz. xi, pp. 731-736. 
0 . Contribution h l’utude de la morphologic de l’oeuf et du follicule. 
Gaz. hebii. sc. med. Bordeaux, ix, pp. 392-394. 
0 . Sur la structure et le developpement de Pceuf et de son follicule. 
Act. Soc. L. Bord. xli, pp. 16, 17, 73, & 74. 
Haacke, Vi. [See Weismann, A., and Heredity.] 
Henning, II. Die erston Entwiokolungs-vorgiingo im Fliogenei und freio 
ICcrnbildung. Z. wiss. Zool. xlvi, pp. 289-337, 4 pis., 3 cuts. 
Especial reference to free nuclear formation. Tho history of the 
nutrient cells. A few observations on polar globules. In most cases of 
fertilisation four spermatozoa seem to enter the ovum, but the super- 
numeraries break up. 
Hektwig, 0. [See General.] 
Hertwig, R. Weitere Yersuche fiber Bastardirung und Polyspermie. 
SB. Ges. Morph, iv, pp. 10-13. [C$f. Mfincheuer med. Wochenschr. 
xxxv, 13.] 
Hickson, S. J. On the Sexual Cells and Early Stages in the Develop- 
ment of Millepora plicata. Phil. Trans, clxxix, b, pp. 193-204, 
2 pis. 
Both male and female elements arise in the ectoderm of the cceuosarcal 
canals, but migrate into the endoderm. The subsequent modifications ; 
the apparently active agency of the spermatoblasts in the formation of 
sporosacs ; the pseudopodial stalk of the ovum ; the formation of two polar 
globules ; tho process of fertilisation ; tho apparent outward migration 
of nuclear elements in the fertilised ovum j &c. ‘ » 
