BY W. J. McKAY. 88& 



throughout the whole thickness of the retina. A scale is formed 

 composed of the cuticular layer of the epidermis (Cm<.), the epi- 

 dermis as a wavy layer {Epd.), and the rete macosum as columnar 

 layer, and below the cutis vera. (The connective tissue sur- 

 rounding the eye has been represented rather too densely). 



Fig. 14. — Head of adult Hinulia tosniolata, showing the appearance of the 

 pineal region when viewed from above. 



Fig. 15. — Scale shown in fig. 14 magnified, the cuticular layer being 

 removed. The eye is seen as a dark body in the parietal foramen. 



Fig. 16. — Head of Grammatopliora ; the cuticle of the scale modified into 

 the cornea. 



Fig. 17. — The eye of fig. 16 magnified, the scale, with the cornea removed 

 showing the eye in the concavity of the scale, placed in the 

 parietal foramen. 



