72 MARY J. ROSS. 



mitoses. Thus by repeated division these small rounded masses 

 of cells increase in size. It does not appear probable that these 



FIGS. 4-7. The following four sections form a series representing one gland 

 throughout its whole extent. Transections (10 /LI] through fundus of a larva of 13 

 mm. Fixed in Gilson's. Letters as in Fig. I. Obj . T L, Oc. I. 



FIG. 4. <?,, end view of gland, showing some of the epithelial cells of the sur- 

 face projecting around the end of the gland. 



FIG. 5. a. 2 , transection through the center of the gland. 



