DEVELOPMENT OF THE CHOROID PLEXUS 111 



vertebrates. In the embryos of 28 and 32 mm., the tela chor- 

 ioidea diencephaU is continued on to the epiphyseal outgrowth. 



9. The position of the fasciculus retroflexus (Meynerti) is 

 indicated in the embryos of 28 and 32 mm. by a jironounced 

 ridge. 



10. There is evidence that the connection of the corpus stria- 

 tum and thalamus is thickened by fusion of the medial root of 

 the corpus striatum with the anterior extremity of the thalamus 

 in the foramen interventriculare. 



11. The sulcus Hmitans is lost in a very deep recess in the 

 embryo of 19 mm. between the corpus striatum and hypothala- 

 mus, and this recess disappears in later stages by fusion of its 

 walls. 



12. The length of the liyj^ollialaniu.s in embrycjs from 19 to 

 32 mm. is relatively very great. In the embryo of 19 mm. the 

 subthalamus is separated externally from the hypothalamus. 



13. The infundibular outgrowtli is still some distance back of 

 the optic chiasm at 19 mm. and becomes sjiifted nearer only in 

 much later stages. 



mtkkah UK ('iTi:i) 



Dkxteu, 1'\ 1'JU2 Tin- (Icvcldpinciil of tlic parjipliysis in tlic ooiiimnn fowl. 



Am. Jour. Anivt., vol. 2, no. 1, pp. 13-24. 

 Faivre 1S54 Lcs plexus choroitlcs. Revuo Modicalc do I'ari.s. Hritisli ami 



Foreign Mod. Chir. Review. 

 FiNDLAY, .1. W. 1809 Tlie ohoroid i)lexu.ses of the lateral ventricles <tf tlie l)rain. 



Brain, vol. 22, pp. 161-202. 

 Francotte, p. 1S94 Xotc sur I'oeil parietal, I'epiphyse, la |)araphyse et les 



plexus choroidcs du troisienie ventricule. Bull, de I'aead. royale, 



des sci. d. Bclg., 3 Scric, T. 27, N. 1, pp. 84-113. 

 Gaupp, E. 1898 Zirbel, I'arietalorgan und I'arapliysis. Krgeh. d. .\nat. u. 



Entwick., Bd. 7, pp. 208-285. 

 Goldstein, K. 1903 Beitnige zur Entw-gesch. d. Mensciil. (.Jeiiirns. Arcii. 



f. Anat. u. Phy.s., Anat. Abt. 

 Haeckel, E. 1860 Zur nonnalon und pathologischen Anatomie des Plexus 



Choroideus. Schmidt'.^ Jahrbiioher. Virehow's Archiv, Bd. 16, 



1859, pp. 253-289. 

 Hkrrick, C. J. 1910 Morphology of the forebrain in Amphibia and Reptilia. 



Jour. Comp. Neur., vol. 20, pp. 413-547. 

 Heuseu, C. H. 1913 The development of the cerebral ventricles in the pig. 



Am. Jour. Anat., vol. 15, pp. 215-239. 



