162 Lake Maxinkuckee, Physical and Biological Survey 



This gathering is very rich in two species, both rather uncom- 

 mon, the oval Cocconeis pediculus E., and the minute club-shaped 

 Gomphonema olivaceum E. 



Sample No. 2. [Cladophora glomerata with sponges, Depot 

 grounds, November 22, 1904]. Cocconeis pediculus E.; Gompho- 

 nema olivaceum E.; Gomphonema constrictum E.; Cymbella macu- 

 lata Kuetzing; Epithemia argus Kuetzing; Epithemia gibba Kuetz- 

 ing; Epithemia zebra Kuetzing; Cymatopleura solea W. S., Navi- 

 cula gastrum E. ; Synedra obtusa W. S., Synedra radians W. S. 



Similar to sample No. 1, but inferior in richness of the 2 species 

 there named. 



Sample No. 3. (Spirogyra, Outlet Bay, October 29, 1904). 

 Amphora ovalis Kuetzing ; Cymbella cymbiformis E. ; Epithemia 

 gibba Kuetzing; Cocconeis pediculus E.; Gomphonema constrictum 

 E.; Melosira varians Ag. ; Fragilaria mutabilis (W. S.) ; Navicula 

 gastrum E. ; Synedra obtusa W. S. ; Synedra radians W. S. 



Though this gathering contained species common to Nos. 1 and 

 2, it is quite different in composition, being particularly rich in 

 species of Cymbella, Epithemia and Synedra. 



Nos. 4, 5, and 6, unimportant as to contents of diatoms. No. 



4. Spirogyra, Depot grounds, November 22, 1904. No. 5. Plank- 

 ton haul No. 22 along shore off the Gravelpit, April 10, 1901. No. 

 6. Fine algaB near ice-houses, November 28, 1904.) 



No. 7. (Blue-green algal mass, for diatoms, near ice-houses, 

 November 28, 1904.) Amphora ovalis Kuetzing; Cocconeis pedi- 

 culus E. ; Cymbella cymbiformis E.; Cymbella maculata Kuetzing; 

 Cymatopleura solea W. S.; Epithemia gibba Kuetzing; Epithemia 

 zebra Kuetzing; Gomphonema constrictum E.; Gomphonema oli- 

 vaceum E. ; Gomphonema acuminatum E. ; Fragilaria mutabilis (W. 

 S.) ; Melosira varians Ag. ; Navicula rhynchocephala Kuetzing; 

 Navicula gastrum E. ; Synedra obtusa W. S. ; Synedra radians W. 



5. The diatoms make up a considerable per cent of this gathering." 

 These identifications along with the descriptions of the condi- 

 tions under which the diatoms were obtained, give a pretty clear 

 notion as to their occurrence in the lake. 



It will be noted that the above collections consist wholly of 

 shore gatherings, and are composed largely of species which are 

 usually attached to other algse. The diatom taken most abundantly 

 in the plankton hauls was a species of Asterionella. 



A few brief notes concerning the more striking or characteristic 

 forms may prove of interest : 



1. CYMATOPLEURA ELLIPTICA (Breb.) 



This large, handsome diatom was only occasionally encountered, 

 chiefly in gatherings from Lost Lake. 



