2. V a u c h e r ia D iu la v y n ii Aij.
Plato IV. Fig. 3.
Char. Frond flexiious, terrestrial. Vesicles sessile, globose.
Grev. Alg. Brit. p. 191. t. 19.; Hooker, Brit. Flor. p. 320.;
Conf. frigida, Dilhvyn’s British Conferva!, t. 10.; Conf.
frigida Botl>, Cat. Bot. 1. p. 166.; Harvey’s Manual, p.
147.; FI. Germ. 111.p.491. Conf. amphibia fihrillosa ct
.^pongiosa, C. terrestris cxilisjihrillosa. Bay’s Synopsis, p.
59. il. 7.
llah. Clicshunt: A. 11. II. Sussex: Mr. Jenner.
This species is by no means uncommon, forming patches
of a bright green colour, on moist and clayey ground. Tliis
Conferva, Mr. Dilhvyn observes, is not unfrequently found
in turnip fields during the Avintcr and early months of spring,
])artlcularly in a northern cx)>osurc, and on a cold soil. The
patches vary in size, but arc usually tAVO or three inches In
extent, adhering but slightly to the soil, and consisting of
loose, nnconncctcd filaments. The form of the cajisnlcs,
Avhich arc rarely pedunculated, Avill at once distinguish this
from all other species Avhich have hitherto been described.
3. V aucheria rerens Ilass.
Plate VI. Fig. 7.
Char. Frond terrestrial. Capsules avicular, or in the form o f
a bird’s head.
Hassall, in Annals of Natural History, vol. xi. p. 430.
llah. Grovving on a footpath near Koyston, Essex, Feb.
21st, 1843.
This forms patches upon the moist earth, like the preceding,
from Avhlch It is not to be distinguished AArithout the aid o f a
lens. The form of the capsules, as seen in the figures, is very
dlfiercnt from that of Vaucheria Dillwynii, and by it tlic
species may at once be knoAvn. I have only once met
Avith it.
4. V aucheria hamata Vauch.
Plate V. Fig. 1.
Char. Capsules ovate, pedunculate, overhangitig the incurved
anther.
Ectosperma hamata Vauch. Hist, des Conf. d’Eau donee, ]).
26. pi. ii. fig. 2.; Hassall, in Annals of Nat. Hist. vol. xi.
p. 439.
llah. Vicinity of Chesliunt; not uncommon.
This species is very distinct, and first occurred to me at
Clicshunt, in a ditch half filled with Avater, in company vvitli
VaMcheria geminata. “ I t differs from all the otlicrs by the
manner in Avhich it carries its grains. The peduncles Avhidi
sustain them arc much elongated, and they bear at their extremity
tAvo little threads: the one is recurved and receives
the anthci', the other is shorter and straightcr, and carries the
crain.”— Vaucher.
5. V aucheria terrestris Vauch.
Plate V. Fig. 2.
Char. Frond irregular, terrestrial. Capsules peduncxdated,
resting almost directly on the recurved anther.
Ectosperma terrestris Vaucher, Hist, des Conf. p. 27. pi. i i . ;
Grev. Alg. Brit. p. 191.; Hook. Br. FI. p. 320.; Berk.
Glean. Alg. t. 9.
llah. Clicshunt: A. II. II. Shady places, frequent,
Sussex: Mr. Jenner.
Tliis Vaucheria, like V. Dillwynii and V. repens, is .also
terrestrial, and like them also forms patches on damp and
clayey soil, Avhich frequently present a bristled ajipcarance,
occasioned hy a number of short and vortical branches, Avhich
arise from the horizontal creeping iibrcs.
The species hears some resemblance to the preceding; the
{ledunclc is largci', coarser, and not so forked as in it, and the
E 3