Part I

, and followed in the text, will be of use to collectors who wish to make herbaria. In order to name and group specimens such a guide is necessary. Should specific names lead to embarrassment, many of them can be neglected, for the names of genera are often a sufficient distinction.

Since so many species of invertebrates are found on the beach that a complete enumeration of them is impracticable, only the most conspicuous ones have been selected for description in