On the Abdominal Viscera and a Vestigial Seventh Branchial Arch in Chamydoselachus.

Abstract

The following notes on the abdominal viscera of Chlam.ydoselachus angtdneus (Gar.) are published, because the first writer on this species, Garman (1), had only a partly eviscei-ated female, and the second writer, Giinther (2), gave only a general description which does not make note of the distinctive characteristics of Chlamydoselachus. On some points, my specimens did not agree with either that of Garman or those of Giinther.