CYTOPLASMIC INCLUSIONS OF THE GERM-CELLS. 607 
egg is being formed. He finds no cytoplasmic bodies till after 
the bouquet stage, an obvious error of observation, and an 
error committed by Miss Beckwith (‘ Journ. Morph./ xxv) as 
well. His figures of emission are (in Aricia) merely late 
stages in formation of the mitochondria (compare PL 30, 
fig. 3 of this paper and Schaxel's PI. 16, figs. 9, 10, etc., in 
his paper ‘ Zool. Jahrb / Bd. xxxiv). He overlooks the early 
stages of mitochondria formation, while his description of 
the “ extra-nuclear chromatin” is apparently in some of his 
papers merely a misinterpretation of later stages of the 
formation of the mitochondria. 
Miss Beckwith, in a paper quoted above, throws doubt on 
the “ Chromatin-emission” of Schaxel. Miss Beckwith says : 
“ There is no evidence of formed material passing through 
the nuclear membrane into the cytoplasm either early 
(Schaxel) or late (Smallwood) in the growth period.” It will 
be seen that Schaxel's work needs confirmation. To me this 
observer's papers appear to be written in a partisan manner, 
simply to bolster up the “ chromidia hypothesis ” in its appli- 
cation to the Metazoa. For an excellent review of this 
matter see Dobell, f Quart. Journ. Micr. Sci./ vol. 53. 
Bibliography. 
1. Gatenby, J. Bronte. — “ The Cytoplasmic Inclusions of the Germ- 
Cells,” Part I, Lepidoptera, ‘ Quart. Journ. Micro. Sci.,’ No. 
247, 1917. 
2. Ancel, P. — “ Histogenese et structure de la glande hermaphrodite 
d’Helix pomatia,” ‘ Arch, de Biol.’ t. xix, 1902. 
3. Demoll, B. — “ Uber Geschlechtsbestimmung im allgemeinen und 
uber die Bestimmung der primaren Sexualcharaktere im beson- 
deren,” ‘ Zool. Jahrb.,’ xxxiii, 1913. 
4. Buresch, Iw. — “ Untersuchungen liber die Zwitterdru.se der Pulmo- 
naten,” ‘ Arch. f. Zellforch.,’ Bd. vii, 1912. 
5. Schitz, Victor. — “ Sur La spermatogenese chez Columbella rustica 
L.,” ‘ Arch. Zool. Exper.,’ t. lvi, 1916. 
6. Tullio, Temi. — “ Condriosomi, idiozomse formazioni periidiozomiche 
nella spermatogenesi degli Anfibii,” ‘ Arch. f. Zellforch,’ Bd. xii, 
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