PAPERS BY MEMBERS 7 I 



Oscillatoria princeps \'aucher. 



Vtvy abundant at irregular intervals in ponds and 

 streams. Fide Collins. 

 Oscillatoria splendida Grev. 



Pool in stone quarrv northwest of Embarras. March. 

 1911. 

 Arthrospira Gomontiana Setchell. 



\*ery abundant during winter and early spring in the 

 middle Tile Factory, and second Big Four ponds. 

 Spirulina major Kuetzing. 



Rare. Has been observed in collections from the Tile 

 Factory ponds and a drainage ditch north of Martins- 

 ville. 

 Phormidium ambiguum Gomont. 



Found on shell of a live snapping turtle in stream south 

 of Ashmore. 

 Phormidium foveolatum 



On submerged water plants. Campus lily pond. Charles- 

 ton. 

 Phormidium inundatum Kuetzing. 



Found in abundance at the north end of the pond on the 

 Brookhart farm, about one mile southwest of Oilfield. 

 April. 1911. 

 Phormidium uncinatum (Ag.) Gomont. 



Common in wet-weather streams and pools in winter and 

 spring. Fide Collins. 

 Lyngbya aerugineo-coerulea ( Kuetz) Gomont. 



Abundant in drainage ditch northwest of Martinsville. 

 October. 1910. Associated with Spirulina major. Fide 

 Collins. 

 Lyngbya aestuarii Liebm. 



Abundant in all ponds in the vicinity of Charleston. Dur- 

 ing a wet period in November. 1909. it grew abundantly 

 and developed a mat on the west bank of Hodgen's 

 pond in association with Rhizoclonium fontanum Kuet- 

 zing. Fide Collins. 



Nostocaceae 

 Nostoc carneum Agardh. 



Abundant in pool at limestone quarry northwest of Em- 

 barras. Xovember. 1910. Fide Collins. 

 Nostoc muscorum Agardh. 



^'ery abundant during the summer of 1910 in the pools 

 along the Clover Leaf R. R., north of Charleston. Fide 

 Collins. 

 Nodularia sphaerocarpa Bornet and Flahault. 



Found in floating masses on Marshall pond, four miles 

 north of Charleston. Fruits during May. Fide Collins. 



