VAUCIIERIA. 53 



4, Vaucheria hamata Vaucli. 



Plate V. Fig. 1. 



Char. Capsules ovate, pedunculate, overhanrjing the in- 

 curved anther. 

 Ectosperma hamata Vaiicli. Hist, des Conf. d'Eau douce, p. 

 26. pi. ii. fig. 2. ; Ilassall, in Annals of Nat. Hist. vol. xi. 

 p. 439. 

 Hah. Vicinity of Cheshuut ; not uncommon. 



This species is very distinct, and first occurred to me at 

 Cheshunt, in a ditch half filled with water, in company with 

 Vaucheria geminata. " It differs from all the others by the 

 manner in Avhich it carries its grains. The peduncles which 

 sustain them are much elongated, and they bear at their ex- 

 tremity two little threads : the one is recurved and receives 

 the anther, the other is shorter and straighter, and carries the 

 grain." — Vaucher. 



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. Fl. p. 320. ; Berk. 



Glean. Alg. t. 9. 

 Hah. Cheshunt : A. H. H. Shady places, frequent, 



Sussex : Mr. Jcnner. 



This Vaucheria, like V. Dilhvynii and V. repens, is also 

 terrestrial, and like them also forms patches on damp and 

 clayey soil, Avhich frequently present a bristled appearance, 

 occasioned by a number of short and vertical branches, wliich 

 arise from the horizontal creeping fibres. 



The species bears some resemblance to the preceding ; the 

 peduncle is larger, coarser, and not so forked as in it, and the 

 j: 3 



