412 



THE OCEAN WOELD. 



generally conical, and covered with a great number of very fine stripe '. 

 Its colour is of a greenish grey, uniform above, and of a greenisk 

 yellow inside. It is abundant in the Channel and on Atlantic coasts. 



The Blue Limpet, Patella cserulea (Fig. 212), from St. Helena, 

 has an oval shell, broadest behind, moderately thick, depressed, 

 flattened, covered with angular wrinkles, and dentate on the edge. 

 It is of a spotted green outside and of a fine glossy blue within. 



Other very elegant species are Patella uinbella (Fig. 213), from 

 the African coast. Patella granatina (Fig. 214), the ruby-eyed 



Fig. 214. Patella granatina (Linnaeus). 



Fig. 215. Patella barbata (Lamarck). 



Limpet from the Antilles; Patella larlata, the bearded Limpet 

 (Fig. 215) ; and the long spined Limpet, Patella longicosta (Figs. 216 

 and 217). 



The fourth family, Calyptrseidse, types Pileopsis and Calyptrdea, was 



Figs. 216 and 217. Patella longicosta (Lamarck). 



classed by the older conchologists with Patella. Pileopsis Hungaricus, 

 the Hungarian bonnet shell, is rather abundant on some parts of the 

 British coast. 



