55 
the irregular cell-growth in the different portions of the tuber. I 
have not been able to trace the leaf-arrangement from positions of 
the buds, either in the Irish or sweet potato (both underground stems) 
so well marked, as in this of the artichoke, probably due to greater 
irregularity in cell-growth of these tubers. This of the artichoke 
offers a fine illustration of the underground tuber following the 
character of the growth above ground. 
Aiken, S. C. 
W 
Notes on New'England Marine Algae. II- — Calothnx parasitica, 
iret. — This species, previously reported at Wood's Hall, Mass., 
Thuret. 
was very abundant last September at Cottage City, completely cover- 
Nejnalion inuliifid. 
Oak Bluffs and the Camp Meeting landings. The natural color of 
Nemalion 
green, turning almost black in drying. This species also occurs at 
Marblehead, but quite sparingly; the plants are so scattered through 
Nemalion 
with the naked eye. I have also found what appears to be the same 
species growing on plants of Batrachospermum vagum, collected in 
fresh water at Billerica, Mass., by Mr. Edwin Faxon. 
Codiolum longipes, Foslie.— In July, i88i, I found at Peak's 
Island, Portland Harbor, Maine, a form of Codiolum, diffenng con- 
siderably from the typical C. gregarium, A. Br., the only species 
recorded in America. The unicellular fronds in the Portland plant 
are longer and slenderer, the stipe longer in proportion to the 
"clava." Dr. F. R. Kjellman, of Upsala, Sweden, kindly examined 
a specimen, and reported it identical with C. longipes, a species 
founded on a plant recently discovered in Norway, and described 
and figured in Christiania Videnskabs-Selskabs Forhandlinger, i88i, 
No. 14. Several species of Codiolum have been described, but, as 
the development is little known, some of them may be merely stages 
of growth of others. My specimens appeared to be entirely in a 
vegetative condition, showing no indication of the formation of 
spores. The plant grew on boulders at about half tide, and was not 
mixed with any other alga. Ulothrix isogona grew in the vicinity, 
but in distinct patches, and generally not on the same rock. When 
wet, the two were hardly distinguishable by the naked eye, but, when 
dry, the Codiolum showed a curious mottled appearance, the tufts 
falling apart so that the transparent stipes showed m minute white 
dots among the green of the upper parts of the cells. 
Chorda tomentosa, Aresch.— Though not recorded, this species has 
probably been collected in this country, but confounded with C. 
filum, the spring state of which it considerably resembles. It is 
however, shorter and stouter, and has longer and denser hairs, which 
— '■■- till after the fruit is formed, in May and June. Ihe hairs 
// 
August. The sporangia of C. tovuntosa are about double the lengtn 
of those of C. filum, and are cylindrical rather than ovate. 1 he 
former are figured in Areschoug's Observationes Phycologic.x, 1 art 
"I., Tab. ii., Fig. i; the latter in Farlow's Manual of the New Eng- 
\ 
