6 



GUIDE TO THE CORAL GALLERY. 



High WaU 



Case 



E. end of 



Gallery. 



" flowers of tan." The cysts rupture and liberate AmocM-like 

 spores (flagellulffi), which fuse together to form a plasmodium. 



Didymivm, one of the Mycetozoa, is figured in Plate II. in the 

 Case. 



TIeliozoa or Sun ANr:\iALCULES. 



The Sun Animalcules are more or less spherical in form and pro- 

 vided with fine ray-like pseudopods. They mostly inhabit fresh water 

 Actinoplirys f<ol, the Common Sun Animalcule (Fig. 2), lives 



Fig. 4.1 



Miliolina tenera, one of the Imperforate Foraminifera. Young 

 living animal with expanded pseudopods. A nucleus is seen 

 in the innermost chamber. Magnified. (After Max Schultze.) 



amongst weeds in ponds. " It commonly appears as a globular, 

 hyaline, foamy, or vesicular body, bristling with delicate rays, land 

 suspended almost stationary in the water" (Leidy). The total 

 diameter is about oV of an inch. The body generally contains, in 

 addition to the central nucleus and the contractile vacuole, nimierous 

 vacuoles and food-balls : the contractile vacuole is usually seen 

 emerging from a point on the surface, bursting, and reappearing at 

 the same spot (Model 3). Actinopkri/s swims by means of its 

 flexible pseudopods, and when one of these touches some organism, 

 the latter is drawn towards the body and engulfed. Well might 



From " Encyclopfedia*Britannica," 



