, BIOLOGY. 
Verm. 21 
with Calkin) ; Erlanger (2). — Spermatophores in 11 species of Swiss 
Earthworms, in 7 of which they were not known to occur before ; Ribau- 
court. 
Gonads of Cestodes ; Braun (3) p. 1384 : their arrangement and 
development in Ichthyotcenia ; Riggenbach (1). — A Monostomum with 
the genital aperture surrounded by spines, and with a single testis ; 
Looss (2). 
Morphology of genital apparatus in Land-Planarians ; v. Graff (2) : 
arrangement and structure in. certain Polyclads ; Plehn (2). — Structure 
of male genital organs in Stenostomum ; Sabussow (1). 
Reproduction. 
Fertilisation of Ascaris egg ; Erlanger (1). — Egg-laying iu a Sagitta, 
the eggs breaking through the germinal epithelium into a duct lying 
between the ovary and body wall ; Conant. — E gg-laying in Nerilla ; 
Peiieyaslawzewa. 
Proterandric hermaphroditism in Dodecaceria ; Monticelli (1). 
Asexual reproduction, its nature and significance in Annelids and 
Platyhelminthes ; Seeliger. — E pigamy and schizogamy in Polychsetes, 
sometimes both occurring in one life cycle ( e.g. } in Autolytus longiferiens 
and j Exogone gemmifera ) ; Malaquin (2). — Epitochous stage in Cirratulids 
(formed by epigamy) ; Mesnil & Caullery (1). — Formation of two 
epitochous forms from one individual (both by schizogamy) in an Auto- 
lytus ; Mensch. — F ission in Naidomorpha ; Smith : in Nemertines ; Ben- 
iiam (3). 
Development and Life-history. 
Anatomy and histology of pelagic Polychoet larvae ; development com- 
pared with that of non-pelagic larvae ; significance and duration of 
swarm-stage ; ELecker. — Post-larval stages of Arenicola ; Kyle. 
Development of Myzostoma ; Wheeler. 
Structure of miracidium (ciliated embryo) of Distomum ; unsuccessful 
attempt to decide whether budding or parthenogenetic development of 
the egg takes place ; the fact that not even one polar body is given off 
established ; Coe. — D evelopment of other species of Trematodes ; 
Looss (2). 
Early development of the Nemertine Brepanophorus spectabilis ; 
Lebedinsky. — M aturation and fertilisation of egg of Tliysanosoon brocchi ; 
v. d. Stricht. 
Segmentation and formation of germinal layers in Ascaris , one 
abnormal embryo described ; Zoja. — T wo cases of eggs apparently 
fusing with one another in Ascaris ; zur Strassen. 
Life-history of certain Bird Tsenias, parasitic in fresh-water Crustacea ; 
Mrazek: of Bothriotcenia plicata ; Ariola (1). — A proliferating Cysti- 
cercus ; Braun (1). 
Direct development of Ascaris lumbricoides in man ; Brandes. 
Regeneration. 
Regeneration of anterior region in Polydora ; MiSsnit, (1) pp. 201 & 
209. — Regeneration of posterior end of body in Nephthys and Allolobo - 
phora, proliferation of ectoderm- not of mesoderm-cells ; Michel (2) 
& (3). — Regeneration in several species of Lumbricidce after self-amputa- 
tion or artificial amputation of posterior or anterior end of body, its 
limitations, and the conditions which influence its rapidity ; Hescheler. 
— Regeneration of anterior and posterior part of alimentary canal after 
