Abstract
Abstract Eggs from 16 species of sea urchins were studied in the electron miscroscope. The jelly coat was present in several of the species, and a hyaline layer was observed between the jelly coat and the actual surface of the egg. As an inner boundary of the jelly coat a membrane was often present. The structure of the cortical granules appeared to be species-specific, and its possible use as a taxonomic character is discussed. At insemination the cortical granules were observed to break down completely before the formation of the hyaline layer and the fertilization membrane. As the events following insemination seemed to be the same for all the species studied, the actual structure of the cortical granules cannot be of importance for these processes.
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.
