328 The Ohio Naturalist. [Vol. VIII, No. 6, 



3. The Cove Habitat. This habitat comprises those por- 

 tions of the Bay which are enclosed by peninsulas, etc., in such 

 a manner as to be procected from the action of currents and surf, 

 and in which the water is several feet at least in depth. 



The Beach Habitat. 



This structure is practically the same beach as is to be found 

 along the Lake shore of the peninsula, although less strongly 

 developed. It has also the same vegetational formations some- 

 what less well developed and so will not need here a separate 

 discussion. This habitat comprises much of the western shore 

 of the peninsula, northwards fi^om the end of the small peninsula 

 at the entrance to Biemiller's Cove. 



The Marsh Habitat. 



This structure is exceedingly well developed between the 

 Bar Section of Cedar Point and the mainland to the south and 

 west, embracing altogether hundreds of acres of pure marsh. 

 From Moseley's researches it appears certain that portions of 

 this marsh have remained marsh for hundreds of years, the 

 accumulation of vegetable debris, transformed into muck, having 

 been so nearly equal to the cumulative rise of water that the 

 marsh vegetation has been able to successfully hold the habitat 

 against all invaders for a very long period. It is further to be 

 remembered that this area was formerly a part of the mainland 

 and at one time covered with forest which was eventually killed 

 by the rise of the water, the marsh then taking its place, perhaps 

 an intervening thicket first appearing. The retarding of the 

 currents of the streams entering the marsh at the present and the 

 occurrence of marsh thickets and pure marshes along the retarded 

 and widening stream are at present indicative of the method of 

 origin of the marsh. 



The structure of the vegetation in the Marsh Habitat may 

 be analyzed thus: 



a. The Scirpus Formation, 



b. The Phragmites-Typha Marsh Formation, 



c. The Salix discolor-lucida Thicket Formation, 



or the Calamagrostis Wet Meadow Formation, 



d. The Rhus liirta Thicket Formation, 



e. The Ulmus-Acer Forest Formation. 



The Scirpus Formation. 



This formation is nearly related to the Typha-Scirpus for- 

 mation of the Lagoon Succession but, as we have pointed out for 

 Prcsque Isle, there is a separation of the two species of that for- 

 mation when the conditions of the Marsh Habitat are attained. 

 Scirpus validus and Scirpus aniericanus are morphologically so 

 constructed as to have a life-form very little affected bv surf, 



