AFJ VK 



FIG. 77. Diagrammatic figure of the head and anterior part of the body of 

 a 7 mm. Tadpole, shortly after batching ; showing the branchial blood- 

 vessels from the ventral surface. The heart has been removed, x 35. 



FIG. 78. Diagrammatic figure of the same embryo from the right side. The 

 heart is represented in situ, but the external gills of the first and second 

 branchial arches have been cut off short at their bases, x 35. 



A, dorsal aorta. AB, basilar artery. AC, carotid artery. AF.l, AP.2, AF.3, 

 afferent branchial vessels of first, second, ami third branchial arches. AP, pulmonary 

 artery. AR, anterior cerebral artery. AT, anterior palatine artery. CA. anterior 

 commissural vessel. CP, posterior commissural vessel. EF.l, EF.2, EF.3, EF.4, 

 efferent branchial vessels of first, second, third, and fourth branchial arches. EH, 

 efferent vessel of hyoid arch. EM, efferent vessel of mandibular arch. GE, external 

 frills. G-M, glomerulus. KA, segmental duet. KP, head kidney or pronephros. 

 KS.l, XS.3. first and third nephrostomes of head kidney. LV.4, efferent lacunar 

 vessel of fourth branchial arch. BA, auricle. RV, ventricle. R.T, truneus arteriosus. 

 VD, Cuvierian vein. VH, hepatic veins. VK, vein of sucker. VM, mandibular 

 vein. VY, hyoidean vein. 



