HALF AN HOUR WITH SEA-MATS AND SQUIBTS. 147 



defended by long, bristle-like hairs, which remain 

 some time after the colony is dead. Fig. 77 will 

 easily introduce a specimen to the eye of the reader. 

 Another species of the same genus is also to be found 



Fig. 77. 



Membranipora pilosa encrusting sea-weed, nat. size. 



matting the surfaces of the larger fronds of seaweeds, 

 often their whole length. The cell- cases in this genus 

 are comparatively larger than those of the last, as is 



