Peristomial Sentence Examples

It is, however, always possible to recognize a head, which consists at least of the peristomial segment with a forward projection of the same, the prostomium.

As in the Oligochaeta the peristomial segment is often without setae; but this character is not by any means so constant as in the Oligochaeta.

The setae, which are always absent from the peristomial segment, are also sometimes absent from a greater number of the FIG.