no 



EISEN 



could be had. The crystals were unequally distributed, in some places 

 filling the whole vessel, while in other parts none were to be seen. 

 They were so hard that the edge of the section knife would break at 

 once. Similarly crystallized hemoglobin has not been observed in any 



Fig. 70- Fridericia harritnani. 



other Enchytraeid. It is always present in Sparganophihis ^ as com- 

 mented on by both Benham and myself. The crystals in the present 

 species are found in all the vessels, capillaries, dorsals, and ventrals. 

 C/iylus cells. — In several longitudinally sectioned specimens these 

 cells were found in somites XI to XIII. The intestine in these somites 



is differentiated into a crop 

 consisting of a layer of 

 chylus cells separated in 

 the usual manner by epi- 

 thelial cells and interstitial 

 cells. The arransrement 

 is a most regular one. 

 Seen in a thin median 

 section passing between 

 the dorsal vessel and the 

 ventral ganglion, and in 

 the longitudinal diameter of the bod}', we find that the chylus cells are 

 cut through perj^endicularly and that each such cell is separated by about 

 two epithelial cells and by one or two interstitial cells. In other words, 

 the chylus cells are placed at regular intervals, the same distance being 

 kept between each two of them in all the three somites. The canal in 

 this species is lined by a distinct membrane which is ciliated along its 



Fridericia harrimani. 



