PLATE XI. 



PIO. 38. Bud-shaped structure of mesogastriutn of frog, trotted with silver, covered with ciliated polyhedral 



.vrmiiKitinu' end.,tl,elium. In tin- ground-substance of the bud-shaped structure are groups of young ain'b,.id 



'i<l in addition to these are vaouole cells beset with cilia on their internal surface i.e. that turned 



towards the cavity of the vacuole. There is also a large vacuole cell, the wall of which has become changed 



int.,, endothelimn. <Oc., 3; Obj., 8.) 





-. -Silver preparation of fanwtlMed portion >,f anterior mediast.ii 

 of the ciidotheliuin surrounding tralwculie (normal). (Oc.. 3; Obi., 7.) 



th* e.-it ; evtrnsiir ireVlninat .{, 



