74 Gen. Sub . I, general subjects. 
Influence of lecithin on growth and reproduction ; Danilewsky (135). 
— The r61e of sex ; the utility of conjugation ; Haycraft (290). — 
Sexual selection ; Douglass (156). 
Hermaphroditism ; Landois (374). — Hermaphroditism in Molluscs. 
Evidence in favour of the view that hermaphroditism is derived from 
separate sexes; Pelseneer (517). — Hermaphroditism in the newt, Triton 
tceniatus ; St. George von la Valette (669). — Successive, protandric, 
and proterogynic hermaphroditism ; Montgomery (461). — Hermaphro 
ditism and dicecism in Myzostomata ; Prouho (539). 
Parthenogenesis : Imparati (324), Duval (167) : in Hymenoptera ; 
Sharp (285), p. 497. — Parthenogenetic cleavage of hen’s egg; Barfurth 
(21). — Parthenogenetic segmentation in egg of hen ; Lau (379). — Par- 
thenogenetic cleavage, hints of this in Amphioxus ; Van der Stricht 
(676). — Parthenogenesis in Insecta ; Paulden (513a). 
Hybridisation experiments with fishes ; even when no embryo develops 
or is conceivable, a regular cleavage may still occur. That is to say, a 
blastoderm may be formed, but no more ; AppellOf (9). — Hybridisa- 
tion of Rana esculenta and R. arvalis. First cleavages are normal ; then 
vegetative half lags, and gastrulation is peculiar ; Gebhardt (240). 
In-breeding, its consoqucncos ; IIaaoke (270). 
Telegony ; Blaikie (46), Ewart (186), vom Ratii (557). 
Habits of Gobius ruthensparri ; Guitel (264). — On the reproduction 
of the eel ; Williamson (757). — Reproduction of wasps ; Marchal 
(421). — Reproduction of bats ; Rollinat & Trouessart (585). — Mor- 
phology and physiology of the ovaries in worker ants ; Bickford (42). 
• — Stockbreeding and heredity ; Keller (336). 
Regeneration : summary of recent work ; Barfurth (20). — Facts and 
theory ; Loeb (402). — Experiments on regeneration ; O. Hertwig (304). 
— Regeneration of the supra- oesophageal ganglia, &c., of earthworm. 
An accumulation of leucocytes forms a “ Regenerationsgewebe which is 
at least the seat of the regenerative process ; Friedlander (215). — 
Experiments by Joest, under Korschelt’s direction, on the union 
of wounded portions of earthworms, in normal position, or upside 
down, or reversed. Even united portions of Lumbricus rubellua and L. 
communis may live. Two united head-ends lived for 16 days, though this was 
unusual ; but two tail-ends united may live for months. Tail-ends may 
regenerate a complete worm ; Korsciielt (354). — Grafting experiments 
with Hydra ; fixing the head of one to the foot of another ; strong 
tendency to restore normal form. Fusion of two forms with poles 
reversed ; regenerative processes still point to theory of definite polarities; 
Wetzel (747). —Brain regeneration : new formation of cells and fibres 
in the brain of an ape after removal of occipital lobes ; Yitzou (713). — 
Reparative processes in cerebrum and cerebellum ; Sana belli (620).— 
Remarkable grafting experiments on tadpoles of various Amphi- 
bians, see Embryology ; Born (57). — Regeneration of crystals : 
a morphological study ; Rauber (559). 
