EIGENMANN 



PLATE 25 



Hrs.ERBieling lei 





Eyes of Stygicola and Lucifuga. 



A. Lucifugas 20 mm. long and ready to be liberated. See plate 15 D for others from the same ovary. 



B. Dorsal view of head of a young Stygicola, about 20 mm. long. 



C. (a) right and (A) left eyes of a young Stygicola 20 mm. long (No. I25A). In b details of marking of iris and ball are shown. 



D. (a) and {b) right and left eyes of the only other individual from the same ovary (No. 125a). 



E. Section of the left eye shown in C b. 



F and G. Vertical sections of right and left eyes shown in D a and b. Seen from in front. X 390. 

 H. Section through middle of lens of left eye. 



