SPECIAL SUBJECTS. 
Gen. Sub. 31 
WJELOWIEJSKI, H. de. Spermatog&iese chez les Arthropodes. Arch, 
slav. Biol, ii, pp. 28-36 ; »J. R. Micr. Soc. 1887, pp. 69 & 70. 
(1) Nuclear filament of spermatocyte breaks up, and does not form 
head of sperm ; (2) Multinuclear spermatogonia, not from endogenous 
division (Gilson), but from fusion ; (3) Contradictory observations to 
many of Gilson’s, but in the main corroborating his conclusions. 
5 . Sex and Reproduction . 
Bertiiold, G. [See Protoplasm.] 
Fertilisation. Notes on cellular phenomena of fertilisation. 
Born, G. Biologische Untersuchungen. Arch. mikr. Anat. xxvii, 
p. 2*74. 
Conditions of hybrid fertilisation in Anura. 
^Clifford, J. R. B. Sex of Winter-flying Butterflies. Ent. xix, p. 178. 
°Colucci, V. Intorno alia regenerazione degli arti e della coda nei 
Tritoni. Mem. Acc. Bologn. vi, Fasc. 3* 
Cunningham, J. T. Reproductive Elements of Myxine glutinosa. 
Q. J. Micr. Sci. xxvii, pp. 49-56, 2 pis. 
A large proportion of immature Myxine are hermaphrodite ; the 
posterior portion of reproductive organ containing testicular capsules, 
similar to those of male (which is very rare), and with spermatozoa. 
°Danilewski, A. J. Ueber die organoplastischen Krafte der Organis- 
men. Arb. Petersb. Ges. xvi, pp. 79-82. 
°Debierke, Cii. L’hermaphroditisme, sa nature, &c. Paris : Bailliere, 
8vo, 11 figs. 
Dewitz, J. Gesetzmassigkeit in der Ortsveranderung der Spermato- 
zoon, &c., und in der Vereinigung derselben mit dem Ei. Arch. ges. 
Phys. xxxviii, pp. 358-385, 1 pi. 
Regularity of sperm movements in circular courses, and mechanism of 
fertilisation in Cockroach. 
°Donath, J. Johann Weier uber den Hermaphroditismus. Virchow’s 
Archiv. civ, pp. 205-208. 
Historical, human hermaphroditism. 
Dusing, C. Die Dauer des Lebens bei hoheren und niederen Thieren. 
Kosmos, xix, pp. 42-54 & 123-136. 
Review of Weismann, Donhoff, Goette, Mobius, Minot. 
Emery, C. La luce negli amori dcllo Lucciolo. Bull. Ent. Ital. xviii, 
pp. 406-411. 
Inter alia, differences in the light exhibited by the two sexes. 
. Ueber dimorphe und fliigellose Mannchen bei Hymenoptereu. Biol. 
Centralbl. v, pp. 686-689. 
Historical. 
