PLATE: ze 







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MrsERBieliitf del 





Eye of Stygicola. 



A. Leh eye of Stygicola, 88 mm. long. From behind. X 390. 



B. Fragment of pigment-layer, poor in pigment. From a neighboring section. 



C. Pigment-cell from choroid of same eye ; few sections removed. 



D. Right eye of same fish, with same magnification. 



El. Left eye of Stygicola, No. 125 (mother of 125 a and h). 92 mm. long. From in front. X 390. Section 



obliquely through optic nerve. 

 F. Left eye of Stygicola, 135 mm. long. From behind. In left of figure outline of mass of pigment lying distad 



from eye is drawn. X 700. 



