This is certainly a very distinct species, and one moreover
by on means uncommon.
20. V es iculifeea fasciata Hass.
P late L I I I . Fig. 6.
Char. Filaments o f diameter about equal to that o f V. crispa.
CeUs usually three times as long as broad. Sporangia
circular, contained in cells o f the same form.
Vesicidfer a fasciata Hassall, in Annals of Nat. H ist., vol x
p. 392.
Hab. In a pond on Nazing Common, F s s e x : A. H. H.
This species differs from the preceding only in the shape of
the seed-bearing ceUs, which in V. crispa are somewhat ovate,
Avhile in V. fasciata they are quite cu’cular. I t is possible
thei'efore tha t it is but a variety of V. crispa.
21. V esiculifera sphteeica Hass.
Plate L I I I . Fig. 5.
Char. Filaments about equal to those o f V. fasciata. CeUs
usually once and a h a lf or tivice as long as hroad.
Sporangia spherical, contained in enlarged cells o f the
same form.
Vesiculifera spharica Hassall, in Annals of Nat. Hist.,
vol. X . p . 392.
Hab. Vicinity of Cheshunt: A. H. H.
This species differs only from the preceding in having
much shorter ceUs. I believe it to be distinct, however.
22. V esiculifera compeessa Hass.
Plate L I I I . Fig. 4.
Char. Filaments about equal to those o f V. fasciata. Cells
twice or thrice as long as broad. Sporangia contained in
cells o f a compressed ellipsoidal form.
Vesiculifera compressa HassaU, in Annals of Nat. Hist.,
vol. X . p. 393.
Hab. In a pond in Yorke’s Brickfield, near Cheshunt:
A. H. H.
The infiations in this species resemble in form the knobs
of dumb-bells.
23. V esiculifera iníequalis.
Plate L I I I . Fig. 2.
Char. Filaments in a state o f reproduction o f very unequal
diameter. CeUs varying in length, being sometimes fo u r
or fiv e times as long as broad, at others only three times ;
these variations occurring usuallg on different parts o f the
same filament. Sporangia circular, lodged in cells which
present an hexagonal appearance, empty cell next the spore
larger than the rest.
Hab. Cheshunt: A . H. H. Rusthall Common and Bur-
wash : Mr. Jenner.
This appears to me to be a very distinct species; it is subject,
however, to considerable variation. I t, as well as the
foUowing, is very common, and both were procured by Mr.
Jenner, Mr. Ralfs and myself within a very short time of
each other.
24. V es iculifera tequalis Hass.
Plate L I I I . Fig. 3.
Char. FUaments o f smaller calibre than those o f the preceding
species, o f equal diameter. CeUs about six times as long
as broad. Sporangia circular, lodged in cells which are
broader than long.
Hab. Cheshunt: A. H. H. Rusthall Common and Del-
monden; H aw k h u rst: Mr. Jenner.
This as weU as the preceding species is found in boggy
pools which retain the water for a long time.