24 The Ohio Journal of Science [Vol. XVI, No. 1, 



and the dimensions are somewhat larger. If this form had been 

 found but once it would have been passed over as a variation 

 intermediate between S. Juergensii and 5. varians. But it 

 has been found several successive years in a small stream south, 

 and at a small pond west of Charleston, Illinois. 



S. lutetiana Petit. 



So far as I am aware no specimens of this species have been 

 found in America. The Illinois record in my list* is an error. 

 The P. B.-A. specimen labelled S. lutetiana is S.fallax (Hansg.) 

 Wille, as shown by its often replicate cell walls, verrucose 

 spores and the number of chromotophores. 



S. velata Nordstedt var. occidentalis Transeau. 



Specimens of this variety have been distributed in the 

 P. B.-A. No. 96, under the name of S. diibta Kiitz. var. long- 

 iarticulata Kiitz. from Oak Bay, Victoria, British Columbia 

 (N. L. Gardner). The spores are for the most part not mature 

 but they show the characteristic scrobiculate markings of the 

 median wall. 



S. Lagerheimii Wittrock. 



This species is not uncommon in central Illinois. The 

 specimen labelled S. communis in P. B.-A. No. 1416, from 

 Winchester, Mass., has a cell diameter over 30/x, and the 

 spores are ellipsoid instead of ovoid. The median spore wall 

 in the mature spores is punctate. Here also belongs the P. B.-A. 

 specimen No. 365, Falmouth, Mass. Both the vegetative cells 

 and the spores are considerably below the lower dimensions 

 for 5. porticalis. The P. B.-A. specimen No. 1668, 5. porticalis 

 var. teniiispira Collins establishes this name as a synonym of 

 S. Lagerheimii. Professor Farlow has recently sent me a 

 specimen of this species from Chocorua, N. H. 



S. daedalea Lagerheim. 



This species has recently been found in a pond south of 

 Coffeen, 111. The spores show the characteristic markings 

 and the dimensions are near those of the original collection. 

 The spores are slightly more rhomboidal than in the type 

 material, which I have seen. In herb. E. N. T. Collection 

 No. 2912, 2850. 



*Transeau, E. N., Annotated list of the Algae of Eastern Illinois. Trans. 

 111. Acad. Sci. 6:69-89, 1913. 



