SPIROGYRA 207 



spores ellipsoid, 20-31 ju- x 43-92/i.; median spore wall reticulate, yellow- 

 brown. (PL XXXVI, Fig. 5.) 



United States: Arkansas (G. C. Couch Coll.); Minnesota near Grand 

 Marais (Nichols Coll.). 



Latvia; China, Szechwan (Jao Coll.); India (Randhawa Coll.). 



Perhaps S. tandae Randhawa should be included here, though slighdy 

 larger than the type. 



215. SpiROG'i'RA KUUSAMOENSis Him 1895. Actu Soc. pro Fauna et 



Flora Fennica. H, p. 11, Fig. 4. 



Vegetative cells i^-iyi^^ x 90-135^^, with replicate end walls; i chro- 

 matophore; conjugation lateral and scalariform ; tubes formed by both 

 gametangia; fertile cells greatly enlarged toward the middle; zygo- 

 spores ellipsoid, 23-33 /x ^ 45~75'^' median spore wall yellow, finely 

 punctate. (PI. XXXVI, Fig. 7.) 



Finland; India, Bombay. 



216. Spirogyra discreta Transeau 1934. Ohio Jour. Sci. 34, 



p. 420. Amer. Jour. Bot. 1, p. 291. 1914 (as S. inflata 

 var. foveolata) . 

 Vegetative cells 16-20 p- x 50-220 /.<-, with replicate end walls; i chro- 

 matophore, making 3 to 6 turns in the cell; conjugation lateral and 

 scalariform; tubes formed by both gametangia; fertile cells greatly 

 inflated toward the middle; zygospores eUipsoid, 28-36 /^ x 50-75 /a; 

 median spore wall scrobiculate, yellow. (PI. XXXVI, Fig. 6.) 

 United States: Illinois, Casey and Charleston. 

 China (Li Coll.). 



217. Spirogyra amplectens Skuja 1937. Symbolae Sinicae. 1, 



p. 85, Figs. ^11. 



Vegetative cells 15-20/tt x 60-200 /x, with replicate end walls; i chro- 

 matophore; conjugation lateral; receptive gametangia cylindrically in- 

 flated to 30-50 /x; zygospores ellipsoid, 32-40 /x x 53-73/^; outer spore 

 wall thick, hyaline, inwardly scrobiculate-punctate; median wall thick, 

 yellow-brown, outwardly reticulate, inwardly scrobiculate-punctate; in- 

 ner wall thin, hyaline and externally rugose. (Pi. XXXVI, Figs. 8-9.) 



China, Yungning, Tschescha Pass, altitude 12,000 feet, luly 25, 19 15. 



This species is very near S. discreta but differs in the cylindrically in- 

 flated fertile cells and the elaborately ornamented spore walls. 



218. Spirogyra groenlandica Rosenvinge 1883. Offers. Kgl. Vet.- 



Akad. Forhandl. Stockholm, 1883, No. 8, p. 37, PL 8, 

 Figs. i-ii. 

 Vegetative cells 18-24^". x 360-600 /x, with replicate end walls; i 



