DESCRIPTION OF PLATE F. 



The alimentary tube is of a violet shade, and under a 

 high magnifying power shows its surface to be paved 

 with epithelial scales: g <j, ovarian glands; tj, granu- 

 lated yolk mass ; c, portion of intestine. 



Fig. 5. — Similar caeca from the oviparous Siplwno- 

 pkora rubi with isolated germ granules and oil globules. 

 The colleterial gland of the fascicle is seen at c. 



Fig. 6. — A highly magnified view of the apical 

 chamber of Gallipterus quercus. <j, glandular bodies ; 

 e, epithelial coat; n, nucleated vesicles. 112 diam. 



Fig. 7. — One of the above glandular masses separated, 

 showing the clear ectoplast and the granular endoplast. 

 295 diam. 



Fig. 8. — Spermatheca showing its clear and non- 

 corrugated walls. By a gentle pressure the sperm- 

 cells were made to escape. 



Fig. 9. — Egg-tube within the lower chamber of 

 which an ovum, o, has undergone its segmentation. 

 The vacuity below represents the polar depression ; 

 g y, as before. 



Fig. 10. — Part of a similar egg-tube or caacum of 

 Siphonophora rosea in which the germinal vesicle with 

 its nucleus has formed at the lower constriction. In 

 the third chamber the ovum is fully developed, and 

 the dark state of the chorion would show that the egg 

 has been impregnated, v, vesicle ; ?/, amorphous vitel- 

 line mass. The cascum of Drepanosiphum platanoides 

 has a form almost identical. 



Fig. 11. — Pseudovum of Phylloxera vastatrix {<j<illi- 

 cola) taken out of one of the leaf excrescences and 

 ] daced under a very gentle pressure in syrup. July. 

 The investing membranes, vitelline and otherwise, are 

 clearly visible. The yolk-mass has become coarsely 

 granular (segmented ?), and the reddish rudiments of 

 the eyes have been already differentiated ; c, chorion of 

 ovum. 



Although these ovoid bodies are expelled just like 

 ordinary eggs; it is doubtful whether they ought not 

 to be considered as pseudova, just as in other genera. 



