402 



[Vol. 10 



GARDEN 



This species seems to be very characteristic by reason of the 

 curved and attenuated apex of its trichomes. It was usually 

 present in great abundance and except in one locality the tri- 

 chomes were always 7 y. in diameter. The specimens from the 

 inlet of Lake A measured only 5 p., but the character of the apex 

 left no doubt as to their identity. It is believed that this is the 

 first record of the species since its original discovery in Italy. 



O. limosa Ag. 



Stump Lake, spring. 



? O. ornata Kiitz. in Gom. Mon. Osc. p. 234, pi 6,f. 15. 1893. 



Amongst moss, near Stump Lake. 



The identity of this alga was somewhat uncertain. In size 

 and general appearance it was very similar to Kutzing's species, 

 but the trichomes were not at all attenuated at the apex, and 

 although distinctly bent, were never spirally curved as figured 

 by Gomont. 



O. tenuis Ag. 



Mission Lake: East Lake. 



Genus arthrospira Stizenb. 



Arthrospira Jenneri (Kiitz.) Stiz. 



Mission Bay, Devils Lake; Mission Lake; East Lake. 



Genus spirulina Turp. 



Spirulina major Kiitz. 



Plankton of East Lake; Spring Lake; mouth of Minnewaukon 

 Bay, Devils Lake, below grade; Odessa, I; inlet of Lake A; Four 

 Mile Lake; North Twin Lake, near Wing. 



S. subtillissima Kiitz. 



■ 



Inlet of Lake A. 



S. tenerrima Kiitz. 



Lake P. 



Genus lyngbta Ag. 



Lyngbya birgei G. M. Smith, Wis. Geol. & Nat. Hist. Surv. Bull- 

 57:54. pi. ?, /. 14, 15. 1920. 



Lake Metigosche; Crow Lake; Gravel Lake; Odessa, I; Juanita 

 Lake; Wood Lake; Spirit wood Lake, I. 



