72 BOTANICAL GAZETTE [JANUARY 
LITERATURE CITED 
1. Hansoire, A., Uber neue Siisswasser und Meeresalgen. Sitzber. Béhm. 
Gesell. 1890. p. ro. 
2. STOCKMAYER, S., Die Algengattung Gloeotaenium. Sitzber. Zoolog.-Bot. 
Gesell. Wien 41:4. 1891. 
3 Witte, N., Nachtrag zu den Desmidiaceae. Die Natiirlichen Pflanzen- 
familien Pireg, 1891. 
4. TURNER, W. B., Algae aquae dulcis Indiae Orientalis. K. Sw. Vet. Akad. 
Handl. .255:157. Stockholm. 1892. 
5. GuTWINSKI, R., Flora glonéw okolic Tarnopola. Kom. Fisyogr. Akad. 
Umiej. Krakow 30:73. 1804. 
6. De Toni, G. B., Sopra la sinonimia e la distribuzione geografica del 
Gloeotaenium Loitlesbergerianum Hansg. Nuova Notarisia 6:30. 1895. 
Rev. Bot. Centralbl. 62:110. 1895. 
7. SCHMIDLE, W., Siisswasser algen aus Australien. Flora 82:302. 1896. 
8. West, G. S., West Indian freshwater algae. Jour. Bot. 42: 288. 1904. 
9. Cortins, F. S., The green algae of North America. Tufts College Studies 
23310. 1909. 
10. TRANSEAU, E. N., The occurrence of the rare alga Gloeotaenium in Illinois. 
Proc. Til. Acad. Sci. 4:143. IgII. 
1x. Wi1tE, N., Nachtrige fiir 1890-1910 zum 1. Teil 2. Abt. Die Natiirlichen 
Pflanzenfamilien. 1911. 
EXPLANATION OF PLATE III 
Fic. 1.—Aplanospore showing gelatinous secretion outside the cellulose 
wall; from culture; this and succeeding figures are from camera drawings. 
2.—Embryonic family about to enter resting period; from Hodgen’s 
mee Octobe 28, 1911; cell wall in optical section showing lamellae. 
3.—Germinating aplanospore; from culture. 
oc 4.—Embryonic family showing early stage in the process of “band” 
formation from Big Four pond July 10, 1911. 
Fic. 5.—Mature one-celled individual; from Big Four pond July 10, 191!- 
Fic. : —Two-celled family ag equatorial remnant of gelatinous spore 
wall; from Hodgen’s pond July 21, rgrt. 
Fic. 7.—Two-celled family doves band and caps; from Big Four pond 
July 10, 1911. 
Fics. 8 and 9.—Two-celled family, side and edge views, showing polar 
modification of the mother cell wall; from Big Four pond July 10, 1911. 
Fic. 10.—Two-celled family lacking the gelatinous secretions; from Big 
Four pond July 10, tort. 
Fic. 11.—Four-celled family showing relation of bands and caps; from 
culture October 31, 191t. 
