CATALOGUE. 415 



ALGiE. 



BY PROF. H. C. WOODS. 



Ulva meeismopedioides, Woods. Sp. Nov. Ampla membranacea 

 late expansa dilute viridis tenuis radiatim et enormiter plicata, ambitu seepe 

 subrotundata ; margine undulato, interdum subcrenato; cellulis enormiter 

 ovalibus vel angularibus, nucleo destitutis, quarternariis et in familias Meris- 

 mopediarwn modo obscure associatis. Diam. cell. max. ^^ = .00041', ple- 

 rumque i2;iJoo-i2;loo' = -00016' -.00025'. — Found in a mountain stream in Dia- 

 mond range, Nevada ; 6,000 feet altitude. (1,545.) 



Lemanea catenata, Kiitz. With the last. (1,546.) 



Batrachospeemum vagum, Kiitz (?) Vage ramosissimum, uni- vel tri- 

 poUicare, fuscum vel serugineum ; internodiis inferioribus ramellis numerosis 

 obsessis, superioribus nudis vel subnudis ; raraulorum articulis extremis setis 

 longissimis instructis. Diam. spor. glob. 4;%' =.00333'. — This is referred 

 doubtfully to B. vagum and is very probably a new species. Found grow- 

 ing on the border of a beaver pond in Pack's Cation, Uintas ; 7,000 feet alti- 

 tude; July. (1,547.) 



NosTOC CEiSTATUM, Bailey. In cold alpine streams and lakes, on rocks, 

 in the Clover Mountains, Nevada, and in the Uintas ; 9-10,000 feet altitude. 

 Common in the Alleghany Mountains, and identical with N. alpinum, K., of 

 Europe. N. Dickcei, Sutherland, found in the low countries of Central Brit- 

 ish America, appears to be the same as our form, though the only published 

 descriptions of it are imperfect. (1,548.) 



Protococcus nivalis, Ag. Not rare on old snows in the alpine regions 

 ot the Sierras, and in the East Humboldt and Clover Mountains, Nevada, 

 and in the Uintas, giving a pale-pink tinge to the drifts. July-Septem- 

 ber. (1,549.) 



Several other forms of fresh-water Alga were collected, but not in 

 suitable condition for determination. 



