Abstract:
The microstructure of retina in Zoacys dhumnades was observed by light microscopy. The cells in outer nuclear layer，inner nuclear layer, and ganglion cell layer were measured and compared, and the distributing character in visual cell was analyzed. The relationship between the structure of the retina and living habits was also investigated. The results show that a large number of cone cells distributes in the central area of retina，and the number of cell in outer nuclear layer and ganglion cell layer is approximate，and the protuberances of pigment epithelium cells extend to cones and rods layer，which suggest that Zoacys dhumnades is diurnal habitual species. In addition, an oval protuberance in pars caeca retinae near pars optica retinae forms continuous lap，and hemal sinus and abundant erythrocytes exist in the protuberance. The homologous relationship may exist between the protuberance and conus papillaris and/or pectin.
