AF.3 



OR 



TC 



LP 



TR 



FlG. 28. A 40-MM. TADPOLE DISSECTED FROM THE VENTRAL 

 SURFACE TO SHOW THE HEART, THE BRANCHIAL VESSELS, AND THE 

 HEAD-KIDNEYS AND WOLFFIAN BODIES. THE TAIL HAS BEEN CUT 



OFF. X 5- (After Marshall.) 



A, dorsal aorta. A F.\, A F.3, afferent branchial vessels of first and third 

 branchial arches. A L, lingual artery. CG, carotid gland. E F.\, E FS, effer- 

 ent branchial vessels of first and third branchial arches. F, fat body. GM, 

 glomerulus. A' A, archinephric or segmental duct. KM, Wolffian bodv. K P, 

 pronephros or head-kidney, now degenerating. LA, fore-limb, st;ll within oper- 

 cular cavity. L /, upper lip. LJ, lower Up. L P, hind-limb. OR, genital 

 ridge. R T, truncus arteriosus. R V, ventricle. T C, cloaca. TO, oesophagus, 

 cut short. T R, cloacal spout. 



