VAUCHERIA. 53 



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. 



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 



