Fia 5 Lono-itudinal and horizontal section through the hind-brain 

 itao-e 0. shewing the roots of the vagus and glossopharyngeal nerves in 



at stage 0, shewin^ 



the brain. Zeiss B, ociil. 2 



tlie brain, /jeiss i^, ucui. z,. ,.„,,, i i 



There appears to be one root in the brain for the glossopharyngeal, 

 and at least six for the vagus. The fibres from the roots divide m many 

 cases into two bundles before leaving the brain. Swellings of the brain 

 towards the interior of the fourth ventricle are in connection with the first 

 five roots of the vagus, and the glossopharyngeal i^ot ; and a swelhng is 

 also intercalated between the first vagus root and the glossopharyngeal 

 root. 



Fig. 6. Horizontal section through a part of the choroid slit at stage 



P. Zeiss B, OCUl. 2. i- ^ -e - / -Pr,1 \ 



The figure shews (1) the rudimentary processus falciformis {p. JaL) 

 dvino- origin to the vitreous humour ; and (2) the hyaloid membrane {hy. m.) 

 which is seen to adhere to the retina, and not to the vitreous humour or 

 processus falciformis. 



