90 



GUIDE TO LOCALITIES. 



The sides of some of the pools not infrequently are found covered 

 with small individuals. 



McJicertum campanula. 

 (After Fewkes, by courtesy of the Essex Institute.) 



Liriope. 

 Staurophora. Clytia. 



(After Fewkes, by courtesy of the Essex Institute.) 



Sponges are common in all the pools, the most abundant being a 

 large smooth species of a delicate greenish hue. Bryozoa always 



