254. BEATRICE WHITESIDE 
eal in form, while others are very flattened. He thinks this 
difference in shape is due to the fact that some of the tubuli are 
quite full of calcareous matter, whereas others contain very little. 
The cells have sharp, distinct outlines and oval nuclei. ‘To this 
description I may add that the nucleus of the cells is very large 
and contains no nucleolus. The chromatin appears in the form 
pr. asc.ant. 
16 
Fig.16 Dorsal view of young frog. (Stage VII.) (Only right saccus endo- 
lymphaticus drawn.) z., transverse processes in definitive form. 
of large lumps—a condition which reminds one of that inthenuclei 
of glandular cells. The protoplasm also recalls that found in 
such organs, showing very fine granulation and containing some 
pigment globules. Lenhossék was not able to prove the exist- 
ence of a membrana propria around the individual tubuli. This 
structure was found by Coggi (’90). 
