V' 



630 L. H. GOUGH. 



s. /. Supporting fibre, ff. Ganglion cell. c. o. m. PunkUubstanz. 1 — 9. 

 Sense-organ-like structures in different stages of development. 



Figs. 9 and 9 «.— Sagittal sections through lateral eyes of embryo of Stage 

 V. Magnified 420 times. 1, 2, 3. First, second, and third eye. 



Fig, 10. — Horizontal section of median eye of embryo of Stage V. Mag- 

 nified 280 times. /. Lens. co. Stratum corneum. p. Pigment. R. Retina. 

 F. Fissure. P.B. Post-retinal layer, c.c. Subocular cavity. 



