1906.] 



SYSTEM OF CERTAIN SPECIES OP ANURA. 



1015 



trunk of the aorta. In a specimen of JR. temporaria the first of 

 the true A a. tirogenitales arose so close to the base of the cceliaco- 

 mesenteric axis that it might almost be said to arise from it. 



A. Goeliaca. — 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. 



Sana clamata, 'J (X IJ). 

 Portion of arterial system. Ventral view. 



(For branches of A. suhclavia, s^-s\ see p. 1013. For explanation of other 

 lettering, see p. 1033.) 



E. clamata, in which the right (ventral) side received two or three 

 important vessels from the left arteiy. Except in B. tiginna and 

 both species of Bufo, there was no vessel given off before the 

 A. gastrica sinistra. 



Proc. Zool. Soc— 1906, No. LXYII. 67 



