Abstract
In the eyes of higher animals the retina is more than a mosaic of independent photoreceptor elements. Even in a primitive eye such as the compound eye of the horse-shoe crab,Limulus, neural interconnections exist and interaction takes place among the receptor units (the ommatidia). The structure and function of the ommatidia inLimulushas been described by Hartline, Wagner and MacNichol (1952) and recent studies of its microstructure by electron microscopy have been made by Miller (1957). Each ommatidium is a functional unit. In response to illumination of its facet it generates trains of nerve impulses in the major optic nerve fiber that arises from one of the cells within it. A network of nerve fibers lies back of the ommatidia, interconnecting them. This plexus has been figured in a recent paper (Hartline, Wagner and Ratliff, 1956), and has been shown to mediate the interacting influences. In theLimulus
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
