OOGENESIS, SPERMATOGENESIS, ETC. Gen. Sub. 49 
sideration of meroblastic ova ; Mitsukuri (474). — Polarity of egg ; 
Castle (105). 
History of ovum, testa-cells, and follicular epithelium in Ascidians ; 
Floderus (232). — Ova of Annelids with compound nucleoli ; Michel 
(402). — History of sex-cells in Cymat.og aster ; Eigenmann (100, 191). — 
Oogenesis in Paludieella ; Braem (82). — Oogenesis in Tubularia larynx. 
Several potential germ-cells coalesce. The nucleus of the strongest pre- 
dominates, and becomes the germinal vesicle. The others may exhibit 
amitotic division, but they degenerate and are assimilated. Compare 
oogenesis of Hydra ; Doflein (164). — Oogenesis in Anura ; Gemmill 
(257). — Ovarian ovum of Salamander and its development ; Gronroos 
(283). — Formation of ova and Graafian follicles in mouse ; Lange (393). 
— Formation of the corpus luteum in the mouse ; Sobotta (639). — 
Yolk nucleus and polar rings [in Allolobophora fcetida~\ are one and the 
same substance ; Foot (235). 
Classification of Vertebrate ova ; Mitsukuri (474). 
An egg inside an egg ; Schumacher (620). 
Ovulation and “heat”: their relations; Heape (311). — Ovulation 
menstruation, and conception ; Strassmann (650). 
b. Spermatozoon. 
General account of spermatogenesis ; Wilson (720). — Resemblance of 
the processes of spermatogenesis in plants and animals ; Belajeff (56). 
— Development of spermatozoon : one kind of cell forms the fertilising, 
another the locomotor part ; comparison of the two sexes : ovum corre- 
sponds to head of spermatozoon ; follicular cells and envelope correspond 
to tail and plasmic appendages ; von Bardeleben (44). — Verson’s cell, 
&c., in spermatogenesis ; a summary and review ; Erlanger (204). — 
Vitality of the spermatozoon ; Peck (531). 
Crystalloid structures iu the interstitial cells of the testes of man ; 
Reinke (563). — Spermatogenesis in Mammals (hedgehog, rat, mouse), 
centrosome and part of sphere form apical knob, other parts of sphere 
form head-cap, axial thread formed from nucleus; Niessing (498). — The 
role of centrosome and sphere in forming the spermatozoon in Mammals; 
Niessing (499).— Interstitial cells of testes in cat, serve for absorption 
and storage of fat, used, in the nutrition of the ripening spermatozoa. 
Fine canals conduct the fat to where it is used; Plato (541). — In 
Monotremes and Marsupials ( Ornithorhynchus , Echidna , Dasyurus , 
Phalangista, &c.), the two main parts of the spermatozoon are said to 
arise from different cells. The heads arise from the mitotic series of 
spermatogonium, spermatocyte, and spermatide. The basal nuclei [Fuss- 
kerne] and their cells show no mitosis, and are quite distinct. They give 
rise to axial filaments, which eventually unite with spermatides, and 
form the tail portions ; Bardeleben (43). — In Salamandra maculosa ; 
Meves (458). — Division of spermatocytes in Salamandra macrdosa ; 
Rawitz (557). — In Anura', Bertacciiini (64). — On the formation of 
thy min from fish-sperm ; Kossel (377). — Chemical composition of 
salmon milt ; Miesciier (464). — History of sex-cells in Cymatogaster ; 
Eigenmann (190, 191). 
Spermatogenesis in Paludina vivipara ; Auerbach (21). — The Neben- 
kern and the formation of the spindle in the spermatocytes of Helix ; 
Bolles Lee (407). — Spermatozoa of Tclphusa fiuviatilis ; Mari (442). 
— Spermatogenesis in Caloptenus femur -rubrum ; Wilcox (714). — Reduce 
tion of chromatin in spermatogenesis of Gryllotalpa , &c. ; vom Rath 
( 555). — The so-called “ Nebenkern ” in male sex-cells of insects ; von 
Erlanger (205). — Minute structure of the testes of the earthworm ; 
von Erlanger (203). 
