BIOLOGY. 
Prot. 47 
reduction-division resulting in the formation of an abortive individual; 
plastogamic union and “couples,” Prowazek (301). 
Isogamous conjugation :—in Gregarina spp. from larvae of Tenebrio - 
molitor, Berndt (19); of the sporoblasts in Monocystis of the earthworm 
confirmed, Prowazek (303) & Cecconi (56, 57). 
Formation of well differentiated micro- and macro-gametes in Stylo- 
rhynckus. Male elements quite as large as the female ones, and with 
reserve nutriment ; conjugation often precocious, before the males are 
typically differentiated, L£ger (215). — Highly differentiated sexual 
elements, and anisogamous conjugation in Pterocephalus nobilis. Con¬ 
trary to the case in &"tylorhynchus, the gametes here are more in line with 
those of Metazoa, the males being very minute and the females large with 
all the reserve nutriment, L£ger & Duboscq (217). 
Precocious association of the microgametocyte and the macrogametocyte 
in Adelea ovata ; the former then gives rise to four microgametes without 
flagella apparently, and the latter, after maturation, becomes the macro¬ 
gamete and is fertilised, Siedlecki (359a).—I n Caryotropha mesnilii the 
microgametocyte gives rise to several microgainetocytes of the second 
order, each of which produces several male gametes—a perfect parallel to 
the schizogony in this animal, Siedlecki (358). — The macrogametes in 
Coccidium fciurei n. sp., are clothed and provided with a micropyle; the 
formation of microgametes proceeds from many centres (“couronnes 
nuclcaires ”) [tending towards the manner in which their formation 
occurs in Cyclospora ], Moussu & Marotel (268.)—Micro- and macro¬ 
gametes (but not fertilization) described for C. oviforme [fairly similar 
to those of C. schubergi\ Tyzzer (395).—Formation of male and female 
gametes, conjugation, and oocyst formation in C. schubergi , Schaudinn 
( 334).—Besides normal fertilization, Schaudinn (335) describes the oc¬ 
currence of polyspermous fertilization of the macrogamete in Cyclosyorct 
caryolytica ,—the superfluous microgametes being usually absorbed in the 
cytoplasm ; in certain cases, however, where the reduction-nuclei of the 
macrogamete (see n, d, 3) have persisted and subdivided, each attracts 
a sperm, which fuses with it, there being thus multiple nuclear fusions in 
the macrogamete. The resultant oocyst in this case degenerates, SCHAU¬ 
DINN (335). 
Sexual reproduction and spore-formation in Isospora \_Diplospora\ 
lieberkUhni , Laveran & Mesnil (200).—Micro- and macro-gametes in 
I. mesnili n. sp.; the former are short and squat, unlike those of Coccidia 
generally, Sergent (354). 
The “glomerular” stage of Smith & Johnson’s (368) Klossiella muris is 
thought by them to represent either schizogony or microgametocyte for¬ 
mation [probably the latter].—Micro- and macro-gametocytes and matu¬ 
ration in Legerella, Cuenot (75). 
Gametocytes in Plasmodium vivax, Argutinsky (5).—Microgametes of 
the tertian parasite: arrangement of the chromatin in, Ruge (324).— 
Gray (144a) criticises Lankester’s statement in (187) that the sex of the 
“crescents” in the “pernicious” parasite is not easily distinguishable 
while in the human blood, and says the sex is usually readily determinable 
from the different arrangement of the pigment in the two cases.—Male 
and female gametes and conjugation in “ Hcemamoeba ” daailewsJcyi , Laveran 
( 192).—Formation of microgametocytes from which microgametes are cut 
oft] and macrogametocytes, which expel half their chromatin on matura¬ 
tion, in Lankesterella and conjugation in the same [strong doubts have 
been recently thrown on this process by Schaudinn, who shews that it is 
very unlikely], Hintze (159). 
Division of the two nuclei of the spore into four, in Thelohania ; 
Stempell (377) considers this as a kind of maturation, and that two 
will subsequently conjugate. 
