406 Charles R. Stockard. 
ILL-ADJUSTMENT OF Optic Curs AND LENSES IN THIRTEEN Day FisH EmBryos. 
Fic. 14 A section of an embryo treated with 5 per cent alcohol. Both optic 
cups are defective, the left one contains a spherical lens, while the right cup has 
a large lens, in shape a constricted oval, and a tiny spherical lens placed fur-’ 
ther within the same cup. E, ear. 
Fic. 15 <A poorly formed eye of the incomplete cylopean type. Each com- 
ponent faces in a ventro-median direction and a spherical lens hes between them 
An ear, E. is shown on the side of the better component, the other ear is absent. 
Fig. 16 Asection 50 microns from the anterior tip of anembryo. The anterior 
border of a cyclopean eye is shown with two protruding lenses of very minute size. 
ec, ectoderm. 
Fic. 17 Section through the anterior tips of two small closely neighboring 
eyes, Whose median planes are in more posterior sections. The smaller eye has a 
protruding double lens. This embryo possesses only one ear located on the side 
with the better eye. 
Fic. 18 Part of an incomplete cyclopean eye (other half in more posterior 
sections) containing a double lens. 
Fic. 19 Two adjacent eyes facing ventro-medianly with two lenses. 
Fic. 20 An ovoid lens in an incomplete cyclopean eye. 
