188 CHAETOPHORACEAE 
moved from this family and placed with the Pleurococcaceae, be- 
cause of the absence of reproduction by zoospores. 
SCHIZOMERIS Kütz. (Phyc. Gen. 247. 1843). We cannot accept 
the view of Professor Wille (g0) who disposes of this genus by 
placing it among the synonyms of Ulothrix. We have found 
Schizomeris Leibleinii Kitz. growing abundantly in a watering- 
trough and also in bright green Spirogyra-like masses at the 
edges of a creek near Long Branch, New Jersey, in midsummer, 
a time when all similar U/othrix forms had disappeared. Although 
certain young filaments were almost indistinguishable from Ulothrix 
sonata, yet in all larger filaments the characteristic brick-like ar- 
rangement of the cells was very different from anything ordinarily 
found in Ulothrix. Most striking, however, was the manner of 
dispersal of the zodspores ; all the dissepiments in the upper part 
of the thallus appeared to be softened or broken down, and the 
masses of zoospores escaped through the open funnel formed by 
the outer cell-wall. We have little question in regard to the 
validity of the genus Schizomeris, but as its affinity seems to be 
with the Ulvaceae rather more than with the Ulothricaceae, further 
treatment of it is reserved for another place. 
GLOEOTILA Kiitz. (Phyc. Gen. 245.1843). Under this name have 
been placed various forms having affinities with Ulothrix and Sticho- 
coccus, some of which, because of insufficient characterization, can- 
not be determined with any certainty. Kiitzing’s type of this genus 
was G. oscillarina (Conferva oscillatorioides Kitz. Alg. Dec.). This 
species was finally removed by its author to Stigeoclonium as S. 
setigerum, so that the genus Glocotila must be abandoned. 
Family CHAETOPHORACEAE 
The thallus consists of a simple or more often branched fila- 
ment, composed normally of a single series of uninucleate cells, 
which may all be of equal value, or some may be specialized as 
supporting or terminal structures and others as potential repro- 
ductive structures. The chromatophore in each vegetative cell 
is band-shaped, or it more or less completely lines the whole 
cell-wall, and generally contains one to many pyrenoids. Asex- 
ual reproduction by means of zoospores, akinetes or aplanospores. 
5 5 
TTT TT 
