6. V e s ic u l i f e r a C u v ie r i Hass.
Char. Filaments more slender than those o f the preceding
species. Cells usually seven times as long as hroad. Sporangia
oval, contained in inflated cells o f an ovate form.
Vesiculfera prolóngala Hassall, in Annals of Nat. Hist.,
X. 390. Prolifera Cuvieri L e Clcrc, Mém. du Mus.
Hah. Pond near Louton, Essex, and again near Enfield ;
A. II. II.
This species is known from V. Landsboroughi hy its finer
filaments, longer cells, and ovate form of the seed-bearing inflated
cells.
“ The infiations of Prolifera rivularis present an oval, rvhose
great diameter is never double the small. In the Prolifera
Cuvieri this enlargement is so much allongatcd th a t one
might distinguish it almost as well by the intensity of its colour
as by its size. In its state of greatest contraction its great
diameter is triple or quadruiile that of the small. The same
proportion, but a little less marked, is observed between the
grains of the two Confervoe.”
7. V e s ic u l i f e r a l a c u s t r i s Hass.
Plate L I I . Eio; 1.
Char. Eilanlents nearly equal in diameter to those o f V.
Cuvieri. CeUs/rom three to fiv e times as long as broad.
Sporangium oval, sometimes almost quadrangular, solitary,
occasioning no verg considerable enlargement o f the cell
in ivhich it lies ; empty cell next the spore also inflated.
Vesiculfera lacustris Hassall, in Annals of Nat. Hist.,
vol. X. p. 3 90.
Hah. In the New River reservoir, near Cheshunt, sparingly,
and other places in the vicinity: A. H. H.
V. lacustris differs from V. Borissii principally in being altogether
a more robust species, and in having shorter cells.
8. V e s ic u l i f e r a p a l u d o s a Hass.
Plate L I I . Fig. 3.
Char. Filaments o f less considerable diameter than those o f
V. lacustris. Cells usually three times as long as hroad.
Sporangia oval, contained in inflated cells o f the same
form.
Vesiculifera paludina ? Hassall, in Annals of Nat. Hist.,
vol. X. p. 390.
Hah. Cheshunt; A . H. H. Framfield Common : 3Ir.
Jenner.
This species comes nearest to V. ciliata; but the inflated
cells are of a different form. I know not whether this be the
species, described by me in the “ Annals ” as Vesiculifera
paludina, or whether that species be different from V. capillaris,
not having had opportunities of making any comparative examination
of them.
9. V e s ic u l i f e r a p u l c h e l l a Hass.
Plate L. Fig;. 3.
Char. Filaments o f considerable diameter. Cells usually two
and a h a lf or three times as long as broad. Sj)orangIa
circular, contained in much inflated cells, ivhich are at fir s t
oval, then circular, and lastly somewhat hexagonal.
Hah. Cheshunt; Netting H i l l : A. H. II.
This is a very fine species, seeking usually rather pure
w a te r; it is of an intense and beautiful green colour.
10. V e s ic u l i f e r a R a l f s i i Hass.
Plate L. Fiff. 8.
Char. Filaments usually rather smaller than those o f V. pid-
chella. Cells varying in length from twice to fo u r times
their diameter. Sporangia circular, lodged in cells o f an
hexagonal form.
o 4