THE SEA-EAR. 



287 



To the scutibranchiate gasteropoda also belong the strangely 

 formed Carin arise, which seem to he made up of disjointed 



Haliotis. 

 e. Series of perforations. d. Eye peduncles. e. Tentacles, g. Foot. 



parts. The gills (g) project from under a thin vitreous shell (f), 

 which projects from the 

 dorsal surface, and has a 

 form not unlike that of 

 the Argonaut or of a Phry- 

 gian cap. The foot (6) is 

 not formed for creeping, 

 but constitutes a muscular 

 vertical paddle or fin, that 

 serves them for swimming 

 on the back, and is fur- 

 nished with a sucking disk (c), with which they are enabled to 

 attach themselves to floating objects. 



C armaria. 



