[523] “Beiträge zur vergl. Morphol. d. Skeletsystems d. Wirbelthiere.” Archiv f. Mikr. Anat. Vol. XVI. 1879.
[524] “Beiträge z. vergl. Morph. d. Skeletsystems d. Wirbelthiere. II. Die Wirbelsäule u. ihre Anhänge.” Archiv f. Mikr. Anat., Vol. XV., 1878, and Vol. XVI., 1879.
[525] “Ueb. d. Entwick. d. Wirbelsäule d. Lepidosteus, mit. vergl. Anat. Bemerkungen.” Jenaische Zeitschrift, Bd. III., 1863.
[526] Comparative Embryology, Vol. II., pp. 462, 463 [the original edition].
[527] We find the serial homology of the ribs and ventral parts of the hæmal arches to be very clear in Ceratodus. Wiedersheim states that it is not clear in Protopterus, although he holds that the facts are in favour of this view.
[528] “On the Young Stages of some Osseous Fishes.—I. The Development of the Tail,” Proc. of the American Academy of Arts and Sciences, Vol. XIII., 1877.
[529] “Observations on the Development of some Parts of the Skeleton of Fishes,” Quart. Journ. of Micr. Science, Vol. VII., 1859.
[530] “Beiträge z. vergl. Anat. d. hinteren Gliedmassen d. Fische,” Morph. Jahrbuch, Vol. V., 1879.
[531] Trans. of the Connecticut Acad., Vol. III., 1877.
[532] St George Mivart, “Fins of Elasmobranchii,” Zool. Trans., Vol. X.