REPRODUCTION, SEX, AND HEREDITY. Geil. Sub. 53 
Fecundity of the female lobster expressed as a function of its size ; 
Lataste (397). — Biological significance of bisexuality; Kurella (387). 
— Sex-differentiation in Cymatogaster. “ Sex cannot be due to the 
position in the ovary, to age of spermatozoa, to condition (age) of 
the egg, to relative amount of nutriment, to kind of food, to relative 
amount of oxygen, or to relative rate of growth. The conditions’ 
determining sex are not known. The ultimate sex-cells are due to 
the process of histogenesis entailed by the division of labour. They 
bear the same relation to the entire corm as any other series of tissues, and 
their origin is to be explained in the same way Eigenmann (190, 191). 
Determination of sex in Daphnids ; Keriierve (362). — Influence of 
nutrition on sex of limpet ; tested by proportions of sexes in littoral 
areas of varied nutritive abundance ; negative result ; Gemmill (258). 
— Hermaphroditism among the Apodulce. Theory that parthenogenetic 
reproduction with suppression of males was brought about by the super- 
abundance of food in early summer, i.e., during the season of growth 
and most rapid multiplication. When the pools dry up and food becomes 
scarce it is necessary to produce resting eggs, for which fertilisation is 
necessary. A certain number of parthenogenetic females become her- 
maphrodites by the production of sperms in parts of the ovary. It may 
be that some especially immature forms become thoroughly male ; Ber- 
nard (63). 
Sexual dimorphism in Lepido’ptera ; Kennel (361). 
Comparative variability of the sexes ; Davenport & Bullard (152).. 
Neotenia ; Boas (73). 
Budding in Metazoa ; Seeliger (629). 
Cross fertilisation and sexual rights and lefts among Vertebrates - r 
Garman (249). 
Fission in Nemertines ( Carinella ) ; separation of the posterior seg- 
ments containing the ripe gonads ; Beniiam (58). 
Epigamy and schizogamy in Annelids ; Malaquin (437). 
On hybridisation and variability ; Grabiiam (273). — Hybrid larvae of 
sea-urchin; Seeliger (629). — Nature of Chabins. Their hybrid origin 
is without foundation. They are simply a race of sheep ; Cornevin 
(130). — Hybrid [not born alive] between Ovis fragelaphus and goat ; 
Milne-Edwards (470). — Hybrid between Equus burchelli , , and E. 
caballus , 9 5 Ewart (209). — Hybridism in Lepidopiera ; Standfuss 
(645). 
Telegony experiments ; Ewart (209). — Alleged influence of a previous 
sire ; conclusion strongly against the reality of this ; Bell (57). — Re- 
productive regeneration in Clavelina lepadiformis. In autumn the co- 
lonies are reduced to stolons, packed with reserve substances. In this 
form the colony hibernates ; regeneration by budding occurs in spring ; 
Giard & Caullery (262). — Report on regeneration and involution ; 
Barfurtii (45). — Autotomy in Cucumaria planci ; Monticelli (480). 
— Autotomy and regeneration of lizard’s tail ; Muller (489). — Regene- 
ration of the lens after exstirpation in Triton; Muller (488). — Regene- 
ration experiments ; Tornjer (668). — Regeneration of lens from iris ; 
discussion of Wolff’s case ; Kupffer (385). — Caudal regeneration in 
Annelids ; Michel (463).— Regeneration in Ndida; ; Hepke (322). — 
Regenerated tail in lizard is different from the original tail, but it is not 
primitive. Tubercle-scales, crests, spines, and keeled scales are not re- 
produced. Within the same family the regenerated tails of all forms 
agree; Werner (710). — Regeneration in Tubular ia ; Driescii (173). — 
Regenerative forces ; Tornier (667). — Regeneration-processes in Lion - 
bricidce ; Hescheler (332). — Regeneration of fore-gut and hind-gut in 
certain Annelids; Rievel (570). — On the smallest parts of Stentor which 
are capable of regeneration ; Lillie (415). — Regeneration of antenna- 
