Note 6 — Chapter IX · DEVELOPMENTAL HISTORY OF ENTOMOSTRACA, CIRRIPEDES, AND RHIZOCEPHALA.

Compare the figure given by Darwin (Balanidæ Pl. xxx fig. 5) of the first natatory foot of the pupa of Lepas australis, with that of Lernæodiscus Porcellanæ published in the ‘Archiv für Naturgeschichte’ (1863, Taf. iii, fig. 5). The sole distinction, that in the latter there are only 3 setæ at the end of the outer branch, whilst in the Cirripedia there are 4 on the first and 5 on the following natatory feet, may be due to an error on my part.