Smallwood. — Maturation Haminea. 



PLATE 1. 



Fig. 1. Full-grown ovarian egg from ovotestis. The large quantity of deutoplasm, 

 represented diagrammatically, obscures the structure of the cytoplasm. 

 There are two plasmosomes in the nucleus. Nucleolus contains a large 

 vacuole, wliich has taken the place of most of the chromatin. Iron 

 hajmatoxylin. X 1224. 



Fig. 2. Young ovocyte from ovotestis. The cytoplasm is granular, but does not 

 pontain yolk spheres. Nucleolus solid. Iron haematoxyUn. X 1224. 



Fig. 3. Ovocyte from ovotestis. A few deutoplasmic spheres in the cytoplasm. 

 Four vacuoles in nucleolus. Iron hematoxylin. X 1224. 



Fig. 4. Egg taken from tlie hermaphroditic duct. The beginning of the first 

 maturation figure. Centrosome composed of five solid bodies sur- 

 rounded by a cortical layer of sphere-substance. The central spindle 

 passes through the germinative vesicle. Two chromosome vesicles 

 have partly formed. Iron ha;matoxylin. X 1680. 



