| OCR Text |
Show 1 9 0 6 .] SYSTEM OF CERTAIN SPECIES OF ANURA. 1 0 1 5 trunk of the aorta. In a specimen of Ii. temporaria the first of the true Aa. urogenitales arose so close to the base of the coeliaco-mesenteric axis that it might almost be said to arise from it. A. coeliaca.-The distinction of sinistra (dorsalis) and dextra (ventralis) as applied to the two divisions of the gastric system was clearly marked with few exceptions, the two branches supplying the left and right sides of the stomach respectively. The only exceptions of any importance were both specimens of Text-fig. 145. JRana clamata, ? (X 1^). Portion of arterial system. Ventral view. (For branches of A. subclavia, sl-s 4, see p. 1013. For explanation of other lettering, see p. 1033.) R. clamata, in which the right (ventral) side received two or three important vessels from the left artery. Except in R. tigrina and both species of Bufo, there was no vessel given oft' before the A. gastrica sinistra. P roc. Z ool. Soc.-1906, No. LXVIL 67 |
