PHYLLIDIA. 



215 



colour through the water. The sea-hare is a harmless creature that lives 

 entirely upon sea-weeds and fuci ; nevertheless, it was formerly dreaded as a 

 most potent poison, and strange tales are told of the atrocities committed by 

 its agency. 



ORDER IXFEROBRAXCHIATA.* 



These Gasteropods very much resemble slugs in their general 

 appearance, but their branchiae consist of leaflets arranged like a 

 fringe along both sides of the body, protected by the border of 

 the mantle, which is of a leathery texture, and without any shell ; 

 their mouth is a little proboscis, provided on each side with a 

 short tentacle (Fig;. 227). 



ORDER CvCLOBRANCHIATA.t 



Iii this Order the gills consist of a series of laminae or pyra- 

 midal appendages, extending quite round the body beneath the 

 edge of the mantle (Fig. 228). It embraces 



* Inferus. beloiv ; branchiae, ^i!/s: jjills situated at the under part of the body, 

 t Ki>K\os, cuclos, a circle ; branchiae, gill. f . 



