56 Gen . Sub. 
I. GENERAL SUBJECTS. 
Asexual multiplication in Turbellarians. An interesting series : — In 
Planaria alpina , over-eating followed by rupture. In PL alpina , 
PL albissima , Bipalium lceicense , no preparatory process to constriction, 
nor regular recurrence. In Pl. alpina and Bip. kewense the plane of divi- 
sion is not fixed. In Polycelis cornuta there is a definite zone, division 
is a normal process of reproduction, the formation of the gullet begins 
before separation. In Pl. subtentaculata the new head has begun before 
the tail portion is separated off. In PL fissipara all the new organs are 
formed before separation ; Voigt (550). 
Origin of budding : Budding in sessile organisms — e.g., Hydroida — 
liable to have parts bitten off, was probably an adaptive regenerative 
process. In Ccenurus there may be the hereditary fixing of a teratological 
multiplicity ; Emery (142). 
Budding of Coelentera : Iu Eudendrium aud Obelia both ectoderm and 
endoderm share in forming the buds. There is no warrant for Albert 
Lang’s conclusion that the bud of Hydra and Hydroids is wholly ecto 
dermic ; Seeliger (504). Of. Lang (292). 
Keimplasma in budding: The conception of a special Knospuugs-keim- 
plasma, which Weismann has elaborated, is as unnecessary as it is 
unverified ; Seeliger (504). 
Budding of Hydroids j Braem (60), Lang (292). 
Regeneration : Summary of recent researches ; Barfurtii (21). 
Growth and regeneration ; Bizzozero (42, 43). 
Regeneration in Turbellaria ; Keller (265). — Regeneration of lens 
in Urodela ; Wolff (582).— Regeneration of a normal lens from the iris 
in Triton tceniatus ; Wolff (581). — Regeneration of limbs of Amphibia ; 
Barfcrth (22, 23). 
Regeneration in Obelia : The regenerative tissue is not differentiated 
at different levels on the stem to produce different things, independent 
of environment, but at all levels produces the same things. But there is 
a tendency at all levels to produce preferably certain forms, perhaps 
related adaptively to the natural frequency of a demand for regeneration 
at certain points rather than others ; Davenport (112). 
Regeneration in Hydroids ; Bickford (40). 
R61e of sex in evolution j Haycraft (223). 
Sexually-produced organisms without maternal characters, repetition 
of Boveri’s experiments, with results which throw doubt upon them ; 
Seeliger (505). 
Hermaphroditism in Mollusca : “ The study of Mollusca, Myzostomidce, 
Crustacea, and Pisces shows that in these groups the separation of the 
sexes has preceded hermaphroditism ; various cases in other groups tend 
to show that this is true universally ; and the same conclusion applies to 
plants. In Mollusca, Crustacea, and Pisces, at least, hermaphroditism is 
grafted upon the female sex” ; Pelseneer (410). 
Hermaphroditism most common in sluggish animals ; Ohatin (89). 
Hermaphroditism, hybridism, parthenogenesis ; Seitz (£06). 
Parthenogenesis of Artemia : The segmentation-spindle may contain 
