XIX.—On the Minute Structure of the Eye in certain Cymothoidæ

Abstract

The structure of the eye in Isopods has been less studied than in any other group of Arthropods; the only modern descriptions of the minute anatomy of the eye in these crustaceans known to me are by Grenacher of Porcellio, by Bullar of Cymothoa, by Bellonci of Sphæroma, by myself of the genus Serolis. I have lately had the opportunity, while engaged upon my Report upon the “Challenger” Isopoda, of investigating the eye in several species of Æga and allied genera. The structure of the eye in these Isopods differs very materially from the descriptions given by Grenacher and Bullar, but agrees very closely with the structure of the eye in Serolis.