Tilt. MUJXADis. 



13 



germs. It haa been found 

 that while a fully grown mon- 

 ad,' called Dallingeria, maybe 

 destroyed at a temporal are of 

 142° F., the .^••'•111 - or young, 

 ^\] i i(-li are inconceivably mi- 

 nute, requiring to be magnified 

 3000 diameters in order to be 

 Been, perish only when heated 

 in fluid to from £12° P. to 

 208° F. It would thus appear 

 that no living beings, either 

 plant or animal, are excep- 

 tions to the universal law that 

 all arise from genus, ll'iiee 

 the doctrine of spontaneous 

 generation, which implies 

 that the lower animals may at 

 the present day develop spon- 

 taneously by chemico-physical 

 action, is not true. 



Some monads are phospho- 

 rescent. Such is the gigantic 

 monad called Noctiluca (Fig. 

 9), which occurs m great iiuni- 



Fig. Q. — Xoctihtca miliaria, diameter '4 

 to l ,nm . and its germs or Boospores. .•-•, 

 style; ». nucleus. Ureatly magnified. 



Fig. 10.— Paramecium cauti&txtm. A 

 view from the dorsal side, magnified 

 840 diameters, ET, the head; T. the 



tail; m, tin- mouth; in t" g, the 

 thr.'at ; <i. tin- posterior openi 

 ili' : . the anterior 



and rr posterior contractile 



; I, II. 111. tin' radiating canals 

 of rr' : n. tht* reproducth I 

 t-. the large vibrating cilia at the 



■ "f the vt-stibule. 



