^{page 145 note 1} Geol. Trans., 2nd ser., vol. v., p. 83.

^{page 145 note 2} Rech. Poiss. Foss., tom. iii., p. 384, tab. 42, 43.

^{page 146 note 1} Geol. Trans., 2nd ser., vol. v., p. 84.

^{page 146 note 2} Rech. Poiss. Foss., tom. iii., p. 379.

^{page 149 note 1} It is an interesting fact in connexion with our subject, that Squaloraia and a Chimœroid species (Ischyodus orthorhinus, Egert.), in which this organ attained its maximum development, were contemporaries, both being found in the same Lias deposit at Lyme Regis. See a Paper on a “New Chimæroid Fish,” by Sir Philip Egerton, Quart. Journ. Geol. Soc, vol. xxvii., p. 275, pl. xiii.

^{page 150 note 1} In the Upper Oolite, or Lithographic Stone of Solenhofen, and elsewhere, remains of many species of Rays are found, some of large size, in which the fin-rays and the dermal covering are perfectly conserved. There is in the British Museum an example of a small species (Squatina speciosa, v. Mey.) from the above locality, in which these parts are beautifully preserved. They are also found in a nearly equal state of preservation in a fissile limestone of Cretaceous age in the Lebanon; and of which there are some good examples in the collection.