228 CHAETOPHORACEAE 
VIII. CHAETOSPHAERIDIUM Klebahn, Jahrb. wiss. Bot. 
44: 390. 1892; 25: 306, 13893" 
Thallus microscopic, epiphytic on filamentous algae; cells 
joined in a short filament by means of empty cylindrical utricles, 
or in a loose aggregation held together by a gelatinous invest- 
ment. Cells flask-shaped, composed of a globose basal portion 
produced into a narrow cylindrical or conical summit which forms 
a basal sheath for a very long and delicate, flagelliform, persistent 
seta. Chromatophore a parietal layer, carrying a pyrenoid. 
Division of the cells horizontal, the lower of the daughter-cells 
migrating to the side. 
Reproduction by means of zoospores, سس‎ to the number of 
4 or more (?) in any cell. 
Inhabitants of fresh water. Type C Pringsheimiü Klebahn. 
[Etym. yar, hair, and ecarptórov, a little sphere. | 
I. CHAETOSPHAERIDIUM PRINGSHEIMII Klebahn, Jahrb. wiss. Bot. 
24: 276. pl. 4. 1892; 25: 307. pl. 14. f. 11. 1893. Moebiüs, 
Flora, 75: 433. 1892. De Wild. Flor. Buitenz. 3: 60. 1900. 
Aphanochaete globosa Moebius, Biol. Centralb. 12: 105. f.8. 1892. 
Thallus composed of 3—18 cells loosely joined into filaments, or 
with the connecting utricles well developed; cells at the base 
globose, 9-12 ¢ in diameter ` sheath 1.5-2 مم‎ in diameter, 10-12 م‎ 
long (13-18 رم‎ Klebahn) ; seta flagelliform, often 200-300 ۸ long 
(I. 42, كز‎ 3, 4 
Creeping on Oedogonium, Greenwood Lake, New Jersey, Sep- 
tember (467). 
In the general character of the cells our specimens agree very 
closely with Klebahn’s description. The utricles, mentioned by 
this author as a prominent character are hardly distinguishable, so 
that possibly our specimens should be considered his forma con- 
fería. ln one case only there appeared to be an investment of 
mucus (shown in our figure). The divergences from C. Pring- 
sheimit do not seem sufficient to warrant establishing a new species. 
2. CHAETOSPHAERIDIUM  GLOBOSUM (Nordst) Klebahn, Jahrb. 
wiss. Bot. 25: 306. fl. r4. f. 5-ro. 1893 ; Bot. Centralb. 56: 
323-326. 1893. 
Herposteiron globosa Nordst. Alg. ex Ins. Sandvic. 23. .اخ‎ 2. f. 
22, 23. 1878. 
* Reported in advanced of publication, Ber. Deutsch, bot. Gesell. و‎ : (7). 1891. 
