34 Gen . Sub. 
GENERAL SUBJECTS. 
Korschei.t, E. Ueber die geschlechtliche Fortpflanzung der Einzelligen 
und besonders der Infusorien. Kosmos, xix, pp. 438-452. 
Review of recent researches. 
. Ueber die Teilbarkeit und das Regenerationsvermogen einzelliger 
Tiere. Kosmos, xix, pp. 266-274. 
Review of Gruber, Nussbaum, &c. 
°LAULAm£, F. Development and Significance of the Germinal Epithe- 
lium in the Testicle of the Chick. Bull. Soc. Toulouse, xx, pp. 
13-16 ; J. R. Micr. Soc. 1887, p. 210. 
Resemblance in development of the germinal epithelium in the two 
sexes— another argument in favour of an organic and primitive her- 
maphroditism. 
Maupas, E. Sur la multiplication de la Leucophri/s patula , Ehr. C.R. 
ciii, pp. 1270-1273. 
Relation between varying nutrition and modes of multiplication. 
[See Protozoa .] 
. Sur ]a conjugaison des Paramecies. T. c. pp. 482-484, &c. 
Paranucleus hermaphrodite, becoming differentiated at reproductive 
epochs, eliminating certain elements, and specialising a fertilising and 
fertilised portion, the former being mutually exchanged. [See Protozoa.~\ 
°Mick, J. Parthenogenesis bei Kafern. Eut. Nachr. 1886, p. 200 ; and 
see ibid., pp. 315 & 316. 
Plate, L. Untersuchung einiger an den Kiemen des Gammarus pulex 
lebenden Ectoparasiten. Z. wiss. Zool. xliii, pp. 175-241, 2 pis. 
Conjugation of Infusorians restores balance between cyto- and nucleo- 
idioplasm. The cell idioplasm may pass into that of nucleus. 
Platner, G. Ueber die Befruchtung bei Arion empiricorum. Arch, 
mikr. Anat. xxvii, pp. 32-72, 2 pis. ; J. R. Micr. Soc. vi, pp. 773-774. 
External and internal phenomena of fertilisation in Avion. Sperm 
usually enters at vegetative pole. If a second sperm enters, it disap- 
pears. Details of nuclear changes. Polar cells occasionally penetrated 
by spermatozoa. 
Rauber, A. Furchung und Achsenbildung. Zool. Anz. ix, pp. 157-150. 
The degree of constancy with which the direction of the first line of 
segmentation is at right angles to the future longitudinal axis. 
^Reuter, J. Ein Beitrag zur Lehre vom Hermaphroditismus. Yerh. 
Ges. Wurzb. xix. pp. 13-60. 
Roux, W. Beitrage zur Entwicklungs-mechanik des Embryo. Z. f. Biol, 
xxi, pp. 1-118 ; J. R. Micr. Soc. vi, pp. 943 & 944. 
Mechanics of development. Formal development of ovum indepen- 
dent of gravity. Influence of electrical stimulus and mechanical injury. 
Frog ova pricked with needle, so that some material lost, develope into 
smaller moribund forms. Definite injuries to ovum produce definite 
defects in embryo. 
