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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, /ia 50-54 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 chromatophore
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 Freshwater
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.