The Pineal Eye of Mordacia mordax. 



103 



actual investigation, the true nature of the epi])hysis, 

 though both he and Rabl Ruckhard had independently 

 arrived at the conclusion that the Pineal eye was to be 

 regarded as the rudiment of an unpaired eye. 



Pineal Eye 



OP 



MORDACIA Mordax 



DESCRIPTION OF WOOD CUT. 



Median Longitudinal Vertical Section through a part of the Head 

 OP Mordacia mordax i:^ the Region of the Pineal Eye. 



Ct. — Connective tissue. 



JSp. — Epidermis. 



L. — Lens part of the eye. 



M. — Muscles. 



Pig. — Pigment immediately beneath epidermis. 



F. — Retina. 



V. — Vesicle of eye filled with fluid during life. 



