196

CYSTOSPERME.33.

Vesiculifera capillaris Linnams? Hassall, in Annals ofNat. Hist. , vol. x. p. 389. V. princeps Hassall, inloc. cit. Prolifer a composita Vaucher, Hist, des Conf.,p. 133. pi. 14. fig. 5.

Hab. Ponds near Notting Hill; Cheshunt , and itsvicinity : A. II. H.

Whether the Vesiculifera, which is here regarded as theConferva capillaris of Linnasus, be that species or not, therecan be no question but that it is the same plant as that con-sidered as such by Agardh, as I have been able to ascertainby the examination of an authentic specimen of Agardh’sC. capillaris var. B. alternata, contained in the Herbariumof Hr. Greville. None of those who have noticed thisspecies were at all acquainted, however, with the true re-production.

3. Vesiculifera condensata Hass.

Char. Filaments of more considerable diameter than thoseof V. capillaris. Cells not so long as broad.

Vesiculifera condensata Hassall, in Annals of Nat. Hist. ,vol. x. p. 388.

Not having again met with this species since it was de-scribed in the Annals , and never having seen it in a state ofreproduction, I am led to think that possibly it may be buta variety of C. capillaris ; than which, however, the filamentsare thicker, and the cells much shorter. It was found ad-herent to a wall reached by the tide in the Thames nearBarnes.

4. Vesiculifera crassa Hass.

Plate LI. Fig. 1.

Char. Filaments fully equal in diameter to those of V. capil-laris. Cells usually Jive times as long as broad. Spo-rangia oral, generally solitary, but sometimes binary, con-tained in cells of a slightly oval form, the length of ivJiichabout twice exceeds the diameter.