232 
Montagu’s blenny. 
constitutes the particular character of the species, is the crest 
or elevation which stands erect across the hinder part of the 
head. This is also slightly fringed at the border, and behind 
it are a few less elevated thread-like processes. The mem- 
branous border of the mouth at the corner is lengthened out, 
and when the fish is in its native clement it is so stretched out 
as to show that it is probably endued with particular sensation, 
(see figure below.) The crest is sometimes placed further in 
advance than it appears to be in other instances. The under 
law is rather feeble; first portion of the dorsal fin proportionally 
a little longer than in the Shanny The colour is for the most 
part more varied than in that fish, but with similar tints; and 
the mottled markings are carried under the throat, where in 
the other fish they do not shew themselves. The crest has 
usually a red margin, and the tail also is tinted with red. 
