94 BOTANICAL GAZETTE | FEBRUARY 
(6) Dull brown filaments. In overflow channel. Temper 
ture 38°C. Near Constant Geyser, Norris Geyser Basin, Yel 
lowstone National Park. W.H.W. 1897. 
Nearly every filament of my specimen contains one or more 
distorted cells. These are sometimes swollen to several time 
the size of the normal cells, and in general have a thicker wal. 
It was first thought that the plant might be identical with or a 
least related to Hormiscia ? thermalis Crouan (in Mazé and 
Schramm Algwes de la Guadeloupe ed. 2, p. 42). But since acces 
cannot be had to this specimen and the data furnished in the 
type description (De Toni Syloge Algarum 1:17}. 1889) 8 
confined to a statement of the color and habitat—‘‘Atro-brur 
nea. Hab. ad muros lateritios in aquario thermali (36° C) at 
‘Dolé’ insulae Guadeloupensis (Coll. n. 351. II série)"—it® 
thought best to place it under the above name. 
Mr. Weed’s specimen appears to be exactly the same plat 
It shows, however, almost no trace of the distortion and no 
lateral projections could be found. 
PROTOCOCCUS BOTRYOIDES (Kg.) Kirchn. forma caldarius, 
n. f. (PU. VIL, fig. 18.) 
Aquatic, vegetative or yellowish green; cells globose, 
in diameter, for the most part solitary ; membrane thin, h 3 
geneous, hyaline; cell contents homogeneous, vegetative ge 
(2) On bottom of spring. Temperature 38°C. With Murr 
spora amoena, forma thermalis. Frying Pan Basin, Yellowstot” 
National Park. 6. E. 7 ji 1896. Agrees with species o 
exception of habitat. : 
4-bF 
omo- 
CALOTHRIX THERMALIS (Schwabe) Hansg.  Beitrage . 
Kenntniss der Béhmisch. Thermalalgenflora (Oeste ne 
Zeitschrift 343279. 1884. (Pl. IX, figs. 1, 2,3: 4s 5°) a 
Stratum soft, dark seal brown or black; filaments crowds : 
flexuose, 10-1 3, rarely 18m in diameter, thickened at ee 
Sheath in young plants thick, lamellated, colorless, in ee 
plants wider, brownish; trichome in young plants ee 2 
