200

CYSTOSPERMEA5.

Vesiculifera pulchella var. Hassall, in Annals of Nat. Hist. ,vol. x. p. 390.

Ilab. Cheshunt and its vicinity, especially Cheshunt Com-mon : A. II. II Penzance: Mr. Ralfs.

Subsequent examination has confirmed the suspicion ori-ginally entertained that this species, which was first sent meby Mr. Ralfs, was distinct from V. pulchella: the inflatedcells are smaller and more hexagonal than they are in thatspecies.

11. Vesiculieeba Vauchebii Hass.

Plate L. Fig. 4.

Char. Filaments about equal to those of V. pulchella. Cellsusually two and a half or three times as long as broad.Sporangia circular, lodged in cells which are very consider-ably inflated and of an ovate form.

V. ventricosum Hassall MSS. Prolifer a Vaucherii? M.

Leon le Clerc, loc. cit.

Ilab. Cheshunt: A. II. II.

This is a very distinct species, differing from V. virescensin its circular sporangia, and highly inflated cells, and fromV. pulchella in the ovate form of the inflations, which inthe latter species are slightly hexagonal.

12. Vesiculifera virescens Hass.

Plate L. Fig. 5.

Char. Filaments equalling in diameter those of V. pulchella.Cells once and a half or twice as long as broad, fasciated.Sporangia ovate, contained in cells of the same form.Vesiculifera virescens Hassall, in Annals of Nat. Hist. ,vol. x. p. 391.

Ilab. Notting Hill, near London : A. H. II.

This species comes very near to the following, of whichpossibly it may be but a variety.