212.
[127] See also the _Popular Science Review_ for July 1868.
[128] A bird with a keeled breast-bone, such as almost all existing birds possess.
[129] "Anatomy of Vertebrates," vol.iii.p.

792.
[130] Ibid.p.

793.
[131] As a tadpole is the _larval form_ of a frog.
[132] As Professor Huxley, with his characteristic candour, fully admitted in his lecture on the Dinosauria before referred to.
[133] "Transactions of the Geological Society of Glasgow," vol.iii.
[134] "Origin of Species," 5th edition, p.

354.
[135] See his address to the Geological Society, on February 19, 1869.
[136] See _Nature_, vol.i.p.

399, February 17, 1870.
[137] Ibid.