VAUCHERIA. 53 



4. VAUCHERIA HAMATA Vauch. 

 Plate V. 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. 



Hob. Vicinity of Cheshunt ; 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 which 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. 



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

 Sussex : Mr. Jenner. 



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

 terrestrial, and like them also forms patches on damp and 

 clayey soil, which frequently present a bristled appearance, 

 occasioned by a number of short and vertical branches, which 

 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 



E 3 



