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ПОР Ч И IK IV Y 
CLADOPHORA 33 
enlarged near the middle or towards Ше distal end, those of the 
ultimate branchlets 2-6 times longer than broad, constrictions at 
the septa often more or less obvious in dried material, scarcely so 
in the fresh; cell walls thin, mostly 2-10 и thick; chloroplasts 
reticulately disposed, filling the cell rather uniformly. [PLATE 4.] 
n a lagoon at La Puntilla, Bay of Paracas, region of Pisco, 
June 29, 1907, Coker 09619 p.p. “This ‘lagoon’ is a small shallow 
arm of the bay. 
In general habit as well as in the form of the cells, Cladophora 
Hariotiana perhaps suggests C. gracilis as much as any other 
commonly recognized species of the genus, but the branching of 
the Peruvian plant is more virgate, the main filaments are less 
angularly flexuous, the cells of the principal axes have twice the 
diameter of the corresponding cells of C. gracilis, and the plant is 
more gelatinous and adheres more firmly to paper. 
It was our first impression that this Cladophora of the Bay of 
Paracas might prove to be a condition of C. allantoides (Mont.) 
Kiitz., the type of which came from brackish water near Callao, 
which is about 220 kilometers farther north. Kützing's figures 
(Tab. Phyc. 4: pl. 42. 7. Г) of this species, drawn from authentic 
material, were rather suggestive of Dr. Coker’s plant, though 
in this comparison it was noted that the cells as there represented 
were hardly long enough, on the average, in proportion to their 
width, that the cells that gave off branches had too much of a 
shoulder below the branch, and that the ultimate branchlets were 
too many cells long to agree with the Paracas plant. An examina- 
tion of the original material of Cladophora allantoides showed other 
differences so pronounced as to make the identification of Dr. 
Coker’s plant with it out of the question. The main filaments of 
С. allantoides range from 90 to 160 и in diameter, while those of 
C. Hariotiana range from 150 to 340 и; its ultimate branchlets are 
less numerous and are often 15-30 cells long instead of 2-8 cells 
long; its cells often collapse in drying and the constrictions at the 
septa are more pronounced, both of which characters evidently 
suggested to Montagne the specific name allantoides; the chloro- 
plasts have a tendency to mass near the septa ("nigroque punc- 
tatis"), leaving the middle portion of the cells more or less hyaline, 
while in C. Hariotiana the chloroplasts are rather uniformly 
distributed and in drying often recede a little from the ends of the 
