570 
MONTGOMERY. 
EXPLANATION OF PLATE XXIV. 
Figs. 137-139- Germinal vesicles of Tetrastemma catenulatum, the nucleoli 
omitted in Fig. 139 (aq. sol. sublimate ; Del. haematoxylin, 25 min.; eosin, 5 
min.). 
Figs. 140-158: Egg development of Amp hip or us glutinosus. 
Figs. 140-143. Germinal vesicles (aq. sol. sublimate ; Del. haematoxylin, 20 
min.; eosin, 5 min.). 
Figs. 144-146. Germinal vesicles with surrounding cytoplasm (as in 143). 
Figs. 147-150. Germinal vesicles (as in 143). 
Fig. 151. An abnormally large yolk ball (aq. sol. sublimate; aq. sol. dahlia, 
15 min.; eosin, 5 min.). 
Figs. 152-154. Germinal vesicles (aq. sol. sublimate; haematoxylin, 45 
min. ; ferro-ammonio-sulphate, 45 min.; haematoxylin, 45 min.). 
Fig. 155. Ovum and a part of the gonadal cavity in which yolk balls lie, only 
a portion of the cytoplasm drawn (as in 152). 
Figs. 156-158. Germinal vesicles (as in 154). 
Figs. 159-ijj: Egg development of Linens gesserensis. 
Fig. 159. Nuclei from which the germinal vesicles are derived, from the cyto¬ 
plasm of the gonad (Hermann’s fluid ; safranin, 70 hrs.; gentian violet, 1 hr.; 
orange G., 2 min.). 
Fig. 160. Ovum (as in 159). 
Figs. 161 and 162. Germinal vesicles (as in 159). 
Fig. 163. Group of neighboring nuclei from a gonad, showing mitotic stages 
(aq. sol. sublimate ; Del. haematoxylin, 20 min.; eosin, 5 min.). 
Figs. 164-172. Nuclei from gonads (as in 163). 
Figs. 173-176. Germinal vesicles (as in 163). 
Fig. 177. The largest ovum found, only a part of the cytoplasm drawn (as in 
