458 
J. BRONTE GATENBY. 
(11) The changes undergone by the macroniitosome in 
sperm formation are followed out. 
(12) The presence of the acroblasts in the fairly early 
growth period of the spermatocyte is described. 
(13) The complicated evolutions of these bodies in division 
of the cells, their subsequent fate and their probable nature 
are discussed. 
(14) The staining and fixing reactions of the cytoplasmic 
bodies are fully described. 
(15) A number of abnormalities have been described. 
(16) The centrosome has been shown to divide in the young 
spermatid, and one centrosome is probably lost, but definite 
evidence is not forthcoming. 
Bibliography. 
1. Meves, F. — “Ueber Centralkorper in den mannlichen Geschlechts- 
zellen von Schmetterlingen,” ‘ Anat. Anz.,' Bd. xiv. 
la. “Ueber den von v. La Valette St. George entdeckten 
Nebenkern (Mitochondrienkorper) der Samenzellen,” ‘Arch. f. 
mikr. Anat.,’ Bd. lvi. 
lb. “ Ueber oligopyrene und apyrene Spermien un uber ihre Entste- 
hung nacli Beobachtungen am Paludina un Pygsera,” ibid., 
Bd. lxi. 
2. Cook, M. H. — “Spermatogenesis in Lepidoptera,” ‘ Proc. Acad. 
Nat. Sci. Philadelphia,’ Bd. lxii. 
3. Henneguy. — (See Bibliography in ‘ Les Insectes.’) 
4 . Platner, G. — “ Samenbildung und Zelltheilung im Hoden der 
Schmetterlinge,” ‘ Arch. f. mikr. Anat., xxxiii. 
5. Doncaster. — ‘ Journal of Genetics, vols. 1, 3, and 4. 
<3. Munson. — “ Spermatogenesis of the Butterfly, Papilio rutulus,” 
‘ Boston Soc. Nat. Hist.,’ vol. xxxiii. 
7. Wilson. — ‘ The Cell.’ 
8. Hegner, R. W. — “ Studies on Germ-Cells,"’ ‘ Journ. Morph.,' xxvi, 
1915. 
9. Montgomery, T. — Ibid., vol. xxii. 
10. Meves. — “ Uber die Beteilung der Plastochondrien au der Befruch- 
tung des Eies von Ascaris,” ‘Arch. mik. Anat.,’ Bd. 76. 
11. Zoja,. — “Uber die fuchsinopliilen Plastidulen,” ‘Arch. Anat. u. 
Entwick.,’ 1891. 
