PLATE XXXII. 



Note. — All figures are from photographs. 

 Fig. I. Side view of Rhuteura Jloridana and dorsal view of its tail. 



2. Horizontal section of head showing Harder's gland and position of the 



eye. 



3. Horizontal section through right eye showing the solid strand of cells 



extending from Harder's gland to near the epidermis. 



4. Horizontal section of left eye of same individual showing extent of pig- 



mentation and lens. 



5. Distal part of another section of same eye showing the different layers 



of the retina at their highest development. 2 mm. objective. 



6. Proximal part of another eye showing the cyst represented diagrammat- 



ically in PI. xxxiii, fig. 3. 2 mm. objective. 



Explanation of Notation Used. 



I. Pigment epithelium. dt. Solid duct of Harder's gland. 



3. Outer nuclear layer. H.Gl. Harder's gland. 



4. Outer reticular layer. hd. Hyaloid membrane. 

 6. Inner nuclear layer. L. Sinistrad. 



8. Inner reticular layer. lens. Lens. 



9. Ganglionic layer. n.op. Optic nerve. 

 c. Cyst of pigment cells containing f. Margin of pupil. 



pigmentless material. R- Dextrad. 



chr. Choroid. scl. Sclera. 



chr.f. Choroidal fissure. V. Ventrad. 



cps. Blood corpuscles. *. Flattened cells beneath the pigment 



D. Dorsad. epithelium. 



(544) 



