Lake Maxinkuckee, Physical and Biological Survey 163 



2. CYMATOPLEURA SOLEA (Bieb.) 



Occasionally scattered through gatherings near shore. 



3. EPHITHEMIA GIBBA Kuetz. 



Fairly common, mixed in with other diatoms ; an occasional ele- 

 ment in mussel food. 



4. EPITHEMIA ARGUS (Ehrenb.) 



Found in the same conditions as the preceding. 



5. EPITHEMIA ZEBRA (Ehrenb.) 



Presence simply noted. No notes. 



6. AMPHORA OVALIS Kuetz. 



Presence simply noted. 



7. CYMBELLA CYMBIFORMIS Ehrenb. 



One of the most common forms in shore gathering. 



8. CYMBELLA MACULATA Kuetz. 

 9. CYMBELLA PROSTRATA (Berk.) 



The shallow water near the ice-houses where the chutes up 

 which the ice is taken enter the lake, was remarkably rich in fine 

 brown, short filamentous tufts which covered the submerged stones 

 and timbers at that place. The material collected here proved 

 to be especially rich in the jelly-like filaments of this species which, 

 while not wholly absent from other parts of the lake, appeared to 

 be nowhere else so abundant as here. 



The above list mentions only the most frequently encountered 

 species or those noteworthy for some particular reason, and is only 

 a beginning of what might be done at or about the lake by one's 

 devoting more than only occasional or rare attention to this special 

 subject. 



10. CYMBELLA NAVICULIFORMIS Auersw. 

 n. RHOICOSPHENIA CURVATA (Kuetz.) 



Occasional, attached to fixed algse such as Cladophora, etc. A 

 wedge-shaped diatom closely resembling species of Gomphonema, 

 but somewhat curved. 



12. GOMPHONEMA CONSTRICTUM Ehrenb. 



This, along with two other species, was common along shore 

 in shallow water, particularly near the ice-houses. They are easily 

 recognized by their wedge-shaped frustules, and all are similar in 

 habit, being attached by a slender gelatinous stipe which proceeds 

 from the acute end to other algse such as Cladophora, and even 

 growing in bunches on rocks. Occasionally they separate from the 

 stalk and are free-floating. 



