Note 30 — 1. Family BALANIDÆ, (or Sessile Cirripedes).

Von Siebold and Stannius, in their ‘Anatomie Comparée,’ tom. i, p. 473, and p. 440, (foot-note), consider the articulated probosciformed penis as an elongated abdomen; a view which, at the commencement of my examination, I was tempted to admit; but the position of the caudal appendages on the dorsal basis of the penis, suffice, I think, to show that this view is not correct; for these caudal appendages evidently correspond with those borne on the very extremity of the abdomen in the pupa. Nor, indeed, does the position of the anus accord well with such a view.