GAMBTOaENESIS OF ORNITHORHYNCIIUS 



479 



clear cone of protoplasm (acp) which lies below. This clear 

 cone of protoplasm is not granular, and passes insensibly into 

 the disk above, on the one hand, and into the neck of the 

 latebra (nl) below, on the other hand (Nucleus of Pander). 

 The latebra (l) is formed of a clear substrate containing numbers 



Text-fig. 1. 



GD 



,-'ACP 



of fine yolk-granules. Completely surrounding the egg, and 

 forming a peripheral area, is a thin layer of clear protoplasm 

 containing very fine yolk-spheres (cl). All the internal 

 substance of the egg, excepting that part occupied by the 

 latebra (l), is filled with enormous numbers of large coarse 

 yolk-spheres ; and within this substance can be found con- 

 centric rings of clear material (cr) which are said to mark areas 

 of growth of the yolk (see Riddle, 5). 



L 1 2 



