226 



LIFE, IN ITS INTERMEDIATE FORMS. 



which project from the shell, pour out a glutinous gum or 

 cement, which hardens in water, and firmly attaches them. 

 Henceforth the animal is a fixture, glued by the front of 

 its head to its support. Another moult now takes place ; 

 the bivalve shell is thrown off, with the great eyes, and 

 their U-like processes, and the little Cirriped is seen in its 

 true form. It is now in effect a Stomapod Crustacean, 

 attached by its antennae, the head greatly lengthened (in 

 Lepas, &c), the carapace composed of several pieces (valves), 

 the legs modified into cirri, and made to execute their 

 grasping movements backwards instead of forwards, and 

 the whole abdomen obliterated or reduced to an incon- 

 spicuous rudiment. 



