558 



APPENDIX 



6 and 70. J In another frog, or before doing number 5, open the peri- 

 cardium, turn the heart forwards, and cut the ligament which 

 connects the ventricle dorsally with the pericardium. Note : 

 glossopharyngeal, vagus, and hypoglossal nerves ; ventricle, 

 auricles, and sinus venosus ; inferior vena cava and hepatic 

 veins ; superior venae cavse, external jugular, innominate, 

 internal jugular, subscapular, subclavian, musculo-cutaneous, 

 and brachial veins ; pulmonary veins (Fig. 401 ; but in 

 this figure the heart is in its normal position and the 

 pericardium unopened). 



Fig. 400. — Diagrams of the urinary and generative organs of the frog. 



A, Organs of the male ; B, those of the female ; bl. t bladder ; c/., cloaca ; e.s., egg 

 sac; f.i., fat body; i.o.d., internal opening of oviduct ; k., kidney; k.d.', kid- 

 ney duct (Wolffian duct); od., oviduct; ov'. t ovary; sr.b., suprarenal body; 

 t., testis ; v.eff., vasa efFerentia ; ves.sem., vesicula seminalis. 



The heart will sometimes be beating when the body is 

 opened, though the animal is dead. If not, it may often be 

 stimulated to beat by a prick. In the beating heart, note the 

 successive phases of the beat (p. 54). 



lb. Turn the heart back, cut through one superior vena cava, 

 and remove its branches. Wash the dissection. Note ; 

 auricles, ventricle, truncus. Trace : carotid, systemic, and 

 pulmonary arches; lingual artery, carotid gland, and 

 common carotid artery ; subclavian and cceliaco-mesenteric 

 arteries ; dorsal aorta (Fig. 30). 



80. Remove the kidneys and generative organs without injuring 

 the aorta. Note : vertebral column ; dorsal aorta and 



