VESIC ULIFERA.
195
has the greatest claim to be retained: a name, however,founded in error.
16. VESICULIFERA.
Char. Same as those of the family.
Derivation. From Vesicula , a vesicle, and fero, to bear.
1. Vesiculieeka princeps Hass.
Char. Filaments of the same diameter as those of V. capil-lams. Cells about once and a half as long as broad.Sporangia circular, producing but a very slight inflation ofthe fructiferous cell.
Isogonium capillare Kiitz. Phyc. Gener. 255. V. princepsHassall, in Annals, vol. x. p. 388.
This species I described in the Annals of Natural History,vol. x. p. 388., under the name of V. princeps; but not meetingwith it a second time, and fearing that it was not really dis-tinct, I referred it to V. capillaris. I am now, however,induced again to regard it as a distinct species, from the cir-cumstance of its being described as such by Kiitzing underthe name of Isogonium capillare, a subgeneric appellation, be-stowed upon it on account of the sporangia not producing anyconsiderable inflation of the fruit-bearing cells, — a circum-stance which scarcely called for such a distinction. Thefigure given by Kiitzing accords closely with one made bymyself of the species long ago, and which I regret I have nothere introduced. The non or slight inflation of the cells willdistinguish it from all other described species.
2. Vesiculifera capillaris Hass.
Plate L. Figs. 1, 2.
Char. Filaments of considerable diameter. Cells varying inlength from nearly twice to almost four times their dia-meter. Sporangia large, circular, contained in distinctinflations of the cells of an evidently ovate form.