APPENDIX 



587 



hemispheres, cerebellum, medulla oblongata, fourth ventricle. 

 Pull outwards one cerebral hemisphere, and note : corpus 

 callosum, optic thalami, corpora quadrigemina (Fig. 331). 

 In ventral view, olfactory, temporal, and hippocampal lobes ; 

 infundibulum ; pituitary body ; corpus albicans; cruri cerebri ; 

 pons Varolii ; medulla oblongata ; roots of second and third 

 to twelve cranial nerves (Fig. 332). 

 Examine the several parts of the skeleton, taking the following 



pill. Oy. 



Fig. 420. — The heart ol a rabbit, seen from the right side, after the 

 removal of the outer wall of the right auricle and ventricle. 



ao.a.., aortic arch; ch.t., chordae tendinea? ; col.c, columnae carneae \f.ov. t fossa 

 ovalis, the site of an opening through which in the embryo there passed into 

 the left auricle blood returning to the heart by the inferior vena cava, much 

 of which came from the placenta and was therefore arterial (p. 508) ; this blood 

 was directed by a fold of the auricular wall known as the Eustachian valve, lying 

 between the openings of the left superior vena cava and the inferior cava, 

 traces of which fold remain in the adult heart ; i.v.c, inferior vena cava ; 

 i.v.c.', internal opening of the same ; l.s.v.c'., internal opening of left superior 

 vena cava ; ru.p., musculi papillares ; pul.a., pulmonary artery, cut open ; 

 r.au., wall of right auricle ; r.s.v.c, right superior vena cava ; r.s.v.c'., internal 

 opening of the same ; si. , semilunar valves ; tr.v., tricuspid valve. 



vertebrae as examples of their series : atlas, axis, third cervical, 

 fourth thoracic, second lumbar, sacrum (Figs. 309-320 and 

 Plate XXI.). 

 10. Examine under the microscope a drop of blood. Compare 

 the red corpuscles [a] with those of the frog, which you have 

 already seen (Fig. 63), (//) with those in a drop of your own 

 blood (Fig. 64). 



