5 74 MONTGOMER Y. 



EXPLANATION OF PLATE XXVI. 



Figs. ig8-20j : Large subcuticular gland cells of Piscicola, in stages of the 



tnetaphase. 



Figs. 198 and 199. Nuclei discharging their nucleoli, only outlines drawn 

 (Flemming's fluid). 



Figs. 200-203. Subsequent stages of the metaphase (as in 198). 



Figs. 204.-212 : Egg develofment of a siphonophore {Rodalia (.'') ; all fixed in 

 alcohol and stained -with Del. haet?iatoxylin). 



Fig. 204. Ovum from gonophore, chromatin unstained. Obj. A, oc. 4. 



Fig. 205. Ovum from egg pouch. Obj. C, oc. 4. 



Fig. 206. Germinal vesicle from egg pouch. Obj. C, oc. 4. 



Figs. 207-209. Germinal vesicles from gonophores. Obj. C, oc. 4. 



Fig. 210. Ovum from egg pouch. Obj. C, oc. 4. 



Fig. 211. A large and a small ovum from an egg pouch. Obj. C, oc. 4. 



Fig. 212. Nucleolus from a large ovum of a gonophore. 



