146 HALF AN HOUR WITH SEA-MATS AND SQUIRTS. 



an object of no mean beauty. Fig. 75 intro- 

 duces us to yet another species of this common 



Fig. 75. 



76. 



Flustra chartacea. 



genus, which, however, has not quite so wide-spread 

 a geographical distribution, being more abundant on 

 our southern and south-eastern 

 coasts than elsewhere. It is a 

 more delicate and fragile speci- 

 men, its fronds also being smaller 

 and more tufted. A portion of 

 the same, magnified sixty dia- 

 meters, is given in Fig. 76. 



We now turn to another 

 genus, nearly allied to the above, 

 whose chief feature is the neces- 

 sity it seems under of attaching 

 itself to some other body, as the 

 fronds and stems of seaweeds, 



Portion of same, X 60. 



or even the surfaces of shells, &c. The apertures are 



