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Show 1 9 0 6 .] THE VASCULAR AND RESPIRATORY SYSTEMS IN OPHIDIA. 4 9 9 4. Contributions to the Knowledge of the Vascular and Respiratory Systems in the Ophidia, and to the Anatomy of the Genera Boa and Corallus. B y F r a n k E. B e d d a r d , M.A., F.R.S., Prosector to the Society. [Received March 7, 1906.] (Text-figures 86-93.) The facts of structure which I lay before the Society, in continuation of other memoirs * dealing with the Ophidia, may be conveniently considered under the following headings, viz.:- (1) On certain Arteries and Veins in the Genera Erythrolamprus and Coluber, p. 499. (2) Some Notes upon the Anatomy of Boa cliviniloqua and B. constrictor, p. 507. (3) Notes upon the Boine genus Corallus, p. 516. (4) On the Modifications of Structure in the Lungs of certain Ophidia, p. 519. (1) On certain Arteries and Veins in the Genera Erythrolamprus and Coluber. Inasmuch as the arrangement of the arteries and veins is known in so few genera of Ophidia, it is clearly useful to collect the facts, even if they appear to have for the time being no bearing upon the classification and relations of the group. I therefore direct attention in the following pages to a few new facts concerning the vascular system of Erythrolamprus cesculapii and Coluber corais, especially of the former species, which was very successfully injected in both the arterial and venous systems. I may observe that with the exception of Tropidonotus natrix, investigated by many anatomists, and most recently by Hoch-stetterf, no Colubrine snake has received so much attention as I give to Erythrolamprus in the following account of some of the principal features in the arrangement of its arteries and veins. Intercostal Arteries.-The arrangement of these arteries in Erythrolamprus (see text-fig. 86, p. 501) recalls in some particulars the intercostal arteries of Python, and in others the intercostal arteries of Colubrine Snakes generally i. The anterior region of the aorta down to about the middle of the liver, or rather beyond that point, gives off very numerous intercostals which * " Contributions to our Knowledge of the Circulatory System in the Ophidia," P. Z. S. 1904, vol. i. " On the Trachea, Lungs, &c., of the Hamadryad," P. Z. S. 1903 vol. ii. " Notes upon the Anatomy of certain Snakes of the Family Boidae," P. Z.S. 1904, vol. ii. " Visceral Anatomy of Hyclrus and Platyurus," ibid. k" Contributions to' the Anatomy of Ophidia," P. Z. S. 1906, vol. i. f Morph. Jahrb. xix. 1893. x P. z. S. 1904, vol. i. p. 335, fig. 67. |
