VAUCHERIA.

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4. Vaucheria hamata Vauch.

Plate Y. Fig. 1.

Char. Capsules ovate, pedunculate, overhanging the in- *curved anther.

Ectosperma hamata Vauch. Hist, des Conf. d’Eau douce , p.26. pi. ii. fig. 2.; Hassall, in Annals of Nat. Hist. vol. xi.p. 439.

Hah. Vicinity of Cheshunt ; not uncommon.

This species is very distinct, and first occurred to me atCheshunt , in a ditch half filled with water, in company withVaucheria geminata. “ It differs from all the others by themanner in which it carries its grains. The peduncles whichsustain them are much elongated, and they bear at their ex-tremity two little threads: the one is recurved and receivesthe anther, the other is shorter and straighter, and carries theCrain.”— Vaucher.

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5. Vaucheria terrestris Vauch.

Plate V. Fig. 2.

Char. Frond irregular, terrestrial. Capsules pedunculated,resting almost directly on the recurved anther.

Ectosperma terrestris Vaucher, Hist, des Conf.p. 27. pi. ii.;Grev. Alg. Brit. p. 191.; Hook. Br. FI. p. 320.; Berk.Glean. Alg. t. 9.

Hub. Cheshunt : A. H. H. Shady places, frequent,Sussex: Mr. Jenner.

This Vaucheria, like V. Dillwynii and V. repens, is alsoterrestrial, and like them also forms patches on damp andclayey soil, which frequently present a bristled appearance,occasioned by a number of short and vertical branches, whicharise from the horizontal creeping fibres.

The species bears some resemblance to the preceding ; thepeduncle is larger, coarser, and not so forked as in it, and the

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