DEBARYA 77 



3. Debarya ackleyana Transeau 1944. Ohio Jour. Sci. 44, p. 244. 



Vegetative cells 12-15 /x ^ 90-140 /u, with a single ribbonlike axile 

 chromatophore with about 8 pyrenoids; conjugation scalariform, tubes 

 long and slender at first, later the median spore wall becomes rounded 

 and the sporangium wall is perfectly distinct; zygospores golden yellow 

 mostly compressed-globose, sometimes ovoid, 50-54 /ia x 52-65 /a; median 

 wall tricarinate, the lateral keels finely ruffled and very distinct, with 

 corresponding corrugations between the keels; the middle keel is thin, 

 radially striate and up to 10 ju. wide; polar walls obscurely pitted and 

 without "hub." (PL XII, Figs. 20-21.) 



United States: Michigan (Ackley Coll.); Massachusetts (Bullard Coll.). 



Named for Dr. Alma Ackley who collected the type specimens near 

 Douglas Lake, Michigan. 



4. Debarya smithii Transeau 1934. Trans. Amer. Micros. Soc. 



53, p. 216. 



Vegetative cells 21-28 ju. x 68-140 m, with i axile ribbonlike chro- 

 matophore containing 2 to 4 pyrenoids; reproduction by zygospores, 

 conjugation scalariform; at time of conjugation, the chromatophores 

 lengthen as they pass into the sporangium and each may then contain 

 from 10 to 20 pyrenoids; zygospores compressed-globose or ovoid, 

 55-72 /A x 64-80^1; the median wall strongly tricarinate with projecting 

 ruffled ridges; the lateral wall between the keels is striate; the polar 

 faces are distinctly and irregularly pitted, sometimes also finely punc- 

 tate. This is the most elaborately ornamented species in the genus, 

 (PI. XII, Figs. 27-28.) 



United States: CaUfornia, Fresno (G. M. Smith Coll.). 



Named for Gilbert M. Smith, Stanford University, author of Fresh- 

 water Algae of the United States, Marine Algae of the Monterey Peninsula, 

 and many other contributions to phycology. 



5. Debarya hardyi G. S. West 1909. Jour. Linn. Soc. of London 



Bat. 39, p. 51, PI. 2. 



Vegetative cells 6.5-8 /a x 57-1 20 m with i ribbonlike chromatophore 

 containing from 2 to 4 pyrenoids; judging by West's figures the num- 

 ber of pyrenoids increases during conjugation; conjugation scalariform; 

 zygospores compressed-quadrangular, 22.5-27 /x on a side. As the spores 

 were immature, further details are unknown. It is possible that this 

 alga may, when fully known, be placed in Zygnemopsis. (Pi. XII, 

 Figs. 29-30.) 



Australia, Victoria, Yan Yean Reservoir. 



6. Debarya polyedrica Skuja 1937. "Algae." Symbolae Sinicae. 



Pt. I, p. 84, PL 2, Figs. 3-8. 



