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Show 1 9 0 6 .] SYSTEM OF CERTAIN SPECIES OF ANURA. 1 0 3 1 this Frog among a number of others that were being dissected by the students in the zoological class at King's College, London, very generously offered to send me the specimen for description, and I am much indebted to him for the opportunity of adding a short account of it here. Text-fig. 154. K. i Rana temporaria, ? (X 2). Ventral view ot A. intestinalis communis, showing abnormal arteries to lungs. L, spleen; po.d., right lung; po.s.. left lung. (For other lettering, see p. 1033.) Examples of similar abnormality, recalling the conditions of the swim-bladder of Teleostean Fishes, have, as is well known, been several times observed in the Common Frog. Dr. E. Warren, when writing in 1902 (Zool. Anz. vol. xxv.), had himself noticed during the previous four years no less than five examples in about 200 individuals. Mr. B. B. Watson records a case in 1896 (Zool. Anz. vol. xix.). Mr. G. P. Mudge describes very fully (Journ. Anat. Phys. vol. xxiii.) a most remarkable instance, in which not only were both lungs involved in arterial and venous connection with the systemic circulation, but the A. hepatica was absent, its function being discharged by a branch from the left A.pul/nionalis. In this latter example, a comparison is drawn by the author with the Ophidian type. In Mr. Woodland's specimen, of which two figures are appended, P roc. Z o o l . S o c .-1906, No. LXVIII. 68 |
