26 Gen. Sub. 
GENERAL SUBJECTS. 
Verson, E. Del grado di Sviluppo che sogliouo raggiungere le Uova 
non fecondate del Filugello. Bull. Soc. Ent. Ital. xxi, pp. 118-123. 
Waldeyer, W. De la Caryocinese et de ses relations avec le processus de 
la F&jondation. (Supplement traduit et annotd par Paul Garnault ) 
Bull. Sci. Fr. Belg. xxii, pp. 88-122, 1 pi. 
Watase, S. Studies on Cephalopods. i. Cleavage of the Ovum. J. 
Morph, iv, pp. 247-302, 4 pis. ; cf. Johns Hopk. Univ. Circ. ix, pp. 
53-56. 
The achromatin spindle is most important in karyokinesis. By it the 
chromatin of the spindle is divided among the daughter-cells. The whole 
phenomena may be connected in one continuous series of activities of the 
cytoplasmic asters upon the nucleus. 
( 3 ) Spermatogenesis. 
Ballowitz, E. Untersuchungen fiber die Struktur der Spermatozoen, 
zugleich ein Beitrag zur Lehre vom feineren Bau der kontraktilen 
Elemente. Die Spermatozoen der Insekten. (i. Coleopteren.) Z. 
wiss. Zool. 1, pp. 317-407, 4 pis. 
The contractile part of the spermatozoa, and especially the undulatory 
membrane or fringe, consists of or contains very fine fibrils. 
. Untersuchungen fiber die Struktur der Spermatozoen. Theil in. 
Fische, Amphibien und Reptilien. Arch. mikr. Anat. xxxvi, pp. 
225-290, 2 pis. 
° . Das Retzius’sche Endstfick der Saugetiere-Spermatozoen. Month. 
Int. J. Anat. Hist, vii, pp. 211-223, 1 pi. 
Cuccati, G. Spermatogenesi nelle Rana esculenta. Anat. Anz. v, pp. 
344-346. 
Ci HENKiNG, H. Ueber Reduktionsteilung der Chromosomen in den 
Samenzellen der Insekten. Month. Int. J. Anat. Hist, vii, pp. 243- 
249. 
. [See Oogenesis.] 
Herrmann, G. Sur la Structure et le Ddveloppement des Spermatozoides 
chez les Ddcapodes. Bull. Sci. Fr. Belg. xxii, pp. 1-59, 4 pis., 15 figs. 
Leclercq, E. [See Cell.] 
The sperm-cells contain a chromatin nucleus and a Nebenkern corre- 
sponding to Boveri’s archoplasm. The latter is a constant element in 
cells. 
Sabatier, A. De la Spermatogenese chez les Locustides. C.R. cxi, pp. 
797-799. 
The degeneration of the nucleus as such, the formation of the sperm- 
head from a protoplasmic vesicle invested internally with chromophilous 
granules. 
