MARINE ALG OF BEAUFORT, N. C. 417 
In addition to the species described above, members of the Myxophyceze were 
observed in more or less abundance at Marshallburg, N. C.; Southport, N. C.; George- 
town, S. C.; and Tybee, Ga.; but the material from these places proved indeterminable 
or, for various reasons, has not been determined. 
Division II. CHLOROPHYCE (Kuetzing, in part) Wittrock. 
Chlorospermez, in part, Harvey, 1858. 
Zoosporee, in part, Farlow, 1882 
Oosporee, in part, Farlow, 1882. 
GREEN ALG&. 
Alge chlorophyll green (rarely red, yellowish, or brownish, sometimes grayish from 
deposits of lime), containing pure chlorophyll in their cells (rarely mixed with other 
pigments); chlorophyll confined to definitely limited bodies, the chloroplasts. Thallus 
consisting of one or more cells, simple or branched, filiform or of various shapes, fila- 
mentous, membranaceous, or tubular. Multiplication asexual or sexual: asexual 
(propagation) by the fragmentation of the entire plant or of some part, or by noncopu- 
lating motile cells (zoogonidia, zoospores, swarm spores), or by resting cells (akinetes, 
aplanospores) ;sexual (reproduction) by at least eventually nonmotile zygotes (zygospores, 
oospores) formed by the copulation or conjugation of gametes free of membranes; 
gametes similar (isogametes), or different in form, size, etc., that is, male and female 
(heterogametes), motile or nonmotile. 
The members of this group live mostly in water, either salt or fresh, while some 
occur on moist soil and some are endophytic. The akinetes and aplanospores are formed 
from vegetative cells. Zoospores are formed either from ordinary vegetative cells or 
from special cells, zoosporangia; they are pear-shaped, bear two or four, less often one 
or many, cilia on their anterior, pointed, colorless end, and often have a red eyespot and 
contractile vacuole; they come to rest after a longer or shorter time, develop a mem- 
brane, and usually develop immediately into new plants. Zygotes are formed in one of 
three ways: (1) By the copulation of two motile gametes, exactly alike or differing 
slightly in size; (2) by the fertilization of a large nonmotile female gamete (egg) by a 
small motile male gamete (sperm); (3) by the copulation or conjugation of two non- 
motile gametes similar in appearance. The similar gametes are formed from ordinary 
cells; eggs and sperms are developed in special organs, oogonia and antheridia. The 
zygote, in some cases, develops immediately into a new plant, but in the majority of 
forms, after a period of rest, develops swarm spores, which, after swimming about, come 
to rest and grow into new plants. 
There is no other group of alge about which there is so much difference of opinion 
concerning the classification. The name Chlorophycee is here used in a broad sense, 
including the Heterokonte, Stephanokonte, Conjugate, etc., of other authors. There 
seems to be need for a name covering this assemblage of forms which seem to show more 
or less close relationship to each other. For these it has seemed desirable to retain the 
old, inclusive name, at least until some uniformity of opinion can be reached regarding 
their division. In this scheme the divisions of other authors (Conjugate, Heterokonte, 
etc.) would be subdivisions under Chlorophycee. 
Nearly 3,000 species; throughout the world. 
