PLATE VI 



Pygoscelis antarctica. 



Fig. I. Embryo No. 8, ventral dissection of bodywith head and neck 

 turned to right, ca, carotid artery; gh, gall bladder; /, liver; ne, neony- 

 chium; rl, retractor linguae; sa, subclavian artery; st, stomach; 

 sv, subclavian vein; td, thyroid gland; uv, umbilical vein; vn, vagus 

 nerve; ys, yolk sac. 



Fig. 2. Deep lateral dissection, left side, ama, anterior mesenteric 

 artery ; ar, aortic root ; bf, bursa Fabricii ; br, bronchus ; ce, cerebellum ; 

 da, coeliac artery; era, crural artery; et, egg tooth ;|'o, gonad; hm, hemi- 

 sphere; i, iris; j, jugular vein; k, metanephros; /, liver; In, lens; 

 me, medulla oblongata; mn, genital duct; o, optic lobe; oe, oesophagus; 

 ol, olfactory lobe; pa, pulmonary artery; pe, pecten; pn, pancreas; 

 pv, pulmonary vein; r, rectum; sea, subcutaneous cervical artery; 

 sp, spleen; spc, spinal cord; x, ureter; j, genital duct. / and IX cranial 

 nerves. 



