270 H. E. JORDAN 



KoELLiKER, A. VON 1896 Handbiuli dci- Clewebelehre des M(>iisclipn. Leipzig. 



Ldui). J. R. 1S99 The pineal gland; its normal structure, some general remarks 

 on its pathology; a case of sphylitic enlargement. Transact, of the 

 Patholog. Society of London, vol. 50. 



Nicolas, I\L 19(M) Note sur la presence dva fil)res musculaires strices dans la 

 glande i)ineale de quelques mammiferes. Compt. rend, de la soc. de 

 biol., Paris. 



Pappenheimeh, a. M. 1910 tJber geschwiilste des Corpus pineale. Virchow's 

 Archiv fiir path. Anat. und Phys., Bd. 200. 



Stt'dxicka, F. K. 1905 Die parietal organe. Oppel's Lehrbuch der verglcich- 

 enden Mikroskopischen Anatomie der Wirbeltiere. 



PLATE 1 



EXPLANATION OF FIGURES 



1 Dorsal peripheral region of pineal body of 5 cm. stage of development showing 

 the early stages in the process of neuroglia formation. X 1500. 



2 Middle region of pineal body of 10 cm. stage showing neuroglia cells, the thick 

 walled character of the smaller blood vessels, and the large perivascular (lymi)h?) 

 spaces. X 1500. 



3 Central cells from 10 cm. stage of development, showing the transition from 

 ependyma to neuroglia cells, and the distribution of the melanic granules in each. 

 X 1500. 



4a Two neuroglia and one inter-ncuroglia cells from 11 cm. stage of (l('\(>lop- 

 ment. 

 46 Various fortns and sizes of the melanic granules. X 1500. 



