PLATE LXI. 



Fir, , -Alveolus from a section of lone of rabbit, 

 of elastic fibre*. 6. Epithelium of the alveolus, seen froi 

 p.na (Oc.. 3; Obj.. ?-> 



-Section of a long of a rabbit, injected 

 through the pulmonary artery, a. Branch of the 

 pulmonary artery losing itaelf in , a dense capil- 

 lary system, p. ix>. <O.x, 3; u 



.-Section of liver of guinempig hardened in bichromate of potsh, showing the cylindrical tnlvcobe 

 of lirer cells. The spaces between the cylindrical cells correspond to capillary blood-vessels. The little 

 > between the constituent cells of a cylinder arc capillary bile ducts cot acre*. P.D& (Oc.. 31 Obj.. S.) 



