312 PROCEEDINGS OF THE ACADEMY OF [May, 



of tlie effects of the former. luspeetiou of fig. 7, A, shows that 

 tlie fluid contents of the cell are free to move from one part of the 

 cell to the other. Some of it is .seen here coagulated on the coelo- 

 mic side of the nucleus. The alveoles in the lower part of this cell 

 were uncommonly distinct. Comparison of this figure with 9 shows 





•rfT^.^ 



^^4»v 



'MiiiMikiU 



Fig. 9. — Median intestinal absorbing cell X 600 from Porcellio scaber, 

 taken from natural environment. Intestine fixed in Hermann's fluid by 

 simultaneous injection and immersion. Alb. Or., albumose granules. 



that the quantity of granular .substance is considerably reduced in 

 the former. The foi'mer is from an animal starved twenty-four 

 days, the latter from one taken fresh from the natural environment. 

 In the coelomic end of the median intestinal cells of animals starved 

 a considerable time (e. g., three weeks), one often finds vacuoles. 

 Again, great extension of the spaces which occur in the palisade next 

 the lumen may be seen. These also are confined mainly to the 

 median cells, and the effect is due merely to a withdrawal of cyto- 

 plasm from the luminal toward the coelomic side (fig. 12). 



V. Absori^tion of Proteids. 



Let us now examine some cells from intestines fixed at different 

 intervals after eating. Fig. 10, B, shows several cells from the 



