[437]

Cf. p. 580.

[438]

Graham Kerr, Quart. Journ. Micr. Sci. xlvi. 1902, p. 417.

[439]

For the nomenclature of the brain and its cavities see T. J. Parker, Nature, xxxv. 1886, p 208; and Parker and Haswell, Text-Book of Zoology, London, 1897, ii. p. 94.

[440]

It is possible that the prosencephalon is merely the bulging anterior part of the thalamencephalon; if this be so the hemispheres are really paired outgrowths from the thalamencephalon.

[441]

In Lizards either of the two vesicles may become a parietal eye (Dendy, Quart. Journ. Micr. Sci. xlii. 1899, p. 111).