200 FRANCIS H. A. MARSHALL. 
lium,” and not “ from the mesoblast, which gives rise to the 
connective tissue and blood-vessels.” If the epithelial and 
interstitial cells are potentially and by origin identical, this 
fact helps to elucidate Van der Stricht’s discovery that in 
the bat’s ovary both of these elements may take part in the 
formation of the lutein cells. It is possible also that it pro- 
vides an explanation of some of the discrepancies between 
statements by various authors regarding the mode of de- 
velopment of the corpus luteum in different animals. Miss 
Lane-Claypon says that in the rabbit “the interstitial cells form 
by far the largest part of the adult ovary,” while in the 
sheep, judging by my own observations, they are relatively 
scarce. F, HAs 
September 28th, 1905. 
LITERATURE SINCE THE YEAR 1895. 
Bettoy.—“ Recherches sur l’origine des corps jaune de l’ovaire chez le rat et 
le cochon d’Inde,”’ ‘C. R. de |’Assoc. des Anatomistes,’ premiere session, 
Paris, 1899. 
Bovuin.—‘* Atrésie des follicules de la Graaf et la formation de faux corps 
jaunes,” ‘ Bibl. Anat.,’ 1899. 
Binter.—* Entwickelungsstadien menschlicher Corpora lutea,” ‘ Verhand. d. 
Anat. Gesellschaft in Pavia,’ 1900. 
Biuuer.—“ Ruckbildung der Hifollikel bei Wirbelthieren,”’ ‘ Morphol. Jahr.,’ 
vol. xxx, 1902. 
Crark.—‘ Ursprung, Wachstum und Ende des Corpus luteum, etc.,” ‘ Arch, 
f. Anat. u. Phys., Anat. Abth.,? 1898; American translation in ‘Johns 
Hopkins Hospital Reports,’ vol. vii, 1899. 
Coun.—“ Zur Histologie und Histogenesis des Corpus luteum und des inter- 
stitiellen Ovarialgewebes,” ‘ Arch. f. Mikr. Anat.,’ vol. Ixii, 1908. . 
CunnincHam.— On the Histology of the Ovary and of the Ovarian Ova in 
certain Marine Fishes,” ‘Q. J. M. S.,’ vol. xl, 1897. 
Dorrine.—“ Beitrag zur Streitfrage iiber die Bildung des Corpus luteum,” 
‘ Anat. Anz.,’ vol. xvi, 1899. 
Gracomin1.—“ Contributo all’ istologia dell’ ovario dei Selaci,” ‘ Ricerca ve 
Laboratoria di Anatomia normale della Roy. Universita di Roma,’ vol, v 
1896. 
