Tin: MAPilNE ALG.E OF NKW ENGLAND. 105 



nonsexual spores (?).0S'"'" broad by .10-12"'"^ loii«^, motionless, borno on 

 short branolios, whieli are at right angles to the main lilaments, tVoin 

 whieh tiiey break oti", allowing the spores to escape from tlie ruptured 

 , ik1. 



Kxs.— Witt roe k «S: Nonlstedt, Alg. Seand., No. 22S. 



On muddy shores and sides of ditehes, where it forms large patches 

 of a dark velvety green. Summer. 



Wood's lIoU, Mass. ; Eastport, Maine; Perth Amboy, N. J., Wullr ; 

 Euroi>e. 



This spoiit's, which is appureutly common on ninthly shon's of New En<^lanil, agrees 

 8t> well with the description au<l lignre of Woronin, 1. c, that there can he uo donht 

 about the identity of our plant with that of the European coast. The non-sexual 

 fruit was unknown to Woronin. At Wood's HoU we found what appeared to he the 

 n»ui-sexual fruit of the species. It consisted of oval spores, smaller than the oospores, 

 borne at the tips of short branches, which were given otf at right angles to the main 

 filaments. The branches with the spores fall otf, and the latter, after some time, 

 escape from the ruptured eml of the cell. The spores are motionless and destitute of 

 cilia, reminding one of the non-sexual spores in V. geminaia, Walz. During the four 

 or five days which we were able to watch them they underwent no change. In th.* 

 specimen of Wolle, above mentioned, similar bodies are found, but Nordstetlt thinks 

 it probable that they belong to a species dittereut from V. Thuretii. He is led to this 

 conclusion apparently from the fact that the filaments bearing the non-sexual spon-s 

 are rather smaller than those which bear the oospores and antheridia. In the WoojI's 

 Holl specimens the filaments were, as a rule, somewhat smaller than those bearing 

 the oospores; but the diti'erence is very slight, and one sometimes finds oosporiferous 

 filaments measuring only .03""" in diameter, while the non-sexual 8i)ore-bearing fila- 

 ments average from .04-5'"'" in diameter. In one case we found an antheriilium on the 

 non-wxual spore-bearing filament, which resembled precisely the antlieridia of V. 

 Thnrt'tii. We conclude then that the non-sexual spores probably belong to the present 

 species, but the (piestion requires further examination. A specimen of what appears 

 • be the same species exists in the collection of the Boston Society of Natural His- 

 'ly. It was collected by Prof. J. W. Bailey from some locality near New York, and 

 - labelled, in his own handwriting, V. velutina. 



V. LiTOREA, Xordstedt (Ag., Spec. xVlg., p. 4G3.— T". damta^ Lyngb., 

 llydrophyt. Dan., p. 78, PI. 21 d.— Y. Uforca, Xordstedt, in Botan. Xo- 

 liser., 1870, p. 180, Tl. 2, Figs. l-C— T". pUoholohlc!^. Farlow. List of 

 .Marine Alga?, 187G.) 



Dioecious; filaments densely tufted, rather rigid, .10""" in <liameter; 

 antheridia ?; oogonia club-shaped, borne on a short sterile cell at the tips 

 of short recurved branches, .20™'" broad by about .'.lo'""'^^ long ; oospores 

 filling the upper i)art of oogonium, spheroidal, .18-10"'"' broad by .23- 

 •j^min long; cell-wall dense, .02'"'" in thickness; non-sexual spores? 



At low-water mark in the gravel. 



Parker's Point, Wood's Iloll, Mass.; EnroiR*. 



Wo refer to the present species a Vauchena much coar.^r than the species last 

 described, whi<li forms rather bristly tiU'ts of a dingy green, frouj two to four inches 

 high, in gravelly places. Only one specimen, collected in August, l-^TG, was in fruit, 



