VII. On the structure and development of lepidosteus

Abstract

The following paper is the outcome of the very valuable gift of a series of embryos and larvae of Lepidosteus by Professor Alex. Agassiz, to whom we take this oppor­tunity of expressing our most sincere thanks. The skull of these embryos and larvae has been studied by Professor Parker, and forms the subject of a memoir already presented to the Royal Society. Considering that Lepidosteus is one of the most interesting of existing Ganoids, and that it is very closely related to species of Ganoids which flourished during the Triassic period, we naturally felt keenly anxious to make the most of the opportunity of working at its development offered to us by Professor Agassiz' gift. Professor Agassiz, moreover, most kindly furnished us with four examples of the adult Fish, which have enabled us to make this paper a study of the adult anatomy as well as of the development.