52 SIPHONE^E. 



2. Vaucheria Dillwynii Ag. 

 Plate IV. Fig. 3. 

 Char. Yvo\\(\Jlexuous, terrestrial. Vesicles sessile, globose, 

 Grev. Alg. Brit. p. 191. t. 19.; Hooker, Brit. Flor. p. 320. ; 

 Conf. frigida, Dillwyn's British Confervas, t. 10. ; Conf. 

 frigida Roth, Cat. Bot. 1. p. 166.; Harvey's Manual, p. 

 147.; Fl. Germ. 111. p. 491. Co??/! amjMhia Jibrillosa et 

 spongiosa, C. terrestris exilis Jihrillosa, Bay's Synopsis, p. 

 59. n. 7. 

 Hab. Cheshunt : A. H. H. Sussex : Mr. Jenner. 



This species is by no means uncommon, forming patclies 

 of a bright green colour, on moist and clayey ground. This 

 Conferva, Mr. Dillwyn observes, is not unfrequently found 

 in turnip fields during the winter and early months of spring, 

 particularly in a northern exposure, and on a cold soil. The 

 patches vary in size, but are usually two or three inches in 

 extent, adhering but slightly to the soil, and consisting of 

 loose, unconnected filaments. The form of the capsules, 

 which are rarely pedunculated, will at once distinguish this 

 from all other species which have hitherto been described. 



3. Vaucheria repens Hass. 



Plate VI. Fig. 7. 



Char. Frond terrestrial. Capsules avicular, or in the form of 

 a bird's head. 



Hassall, in Annals of Natural History, vol. xi. p. 430. 



Hab. Growing on a footpath near Royston, Essex, Feb. 

 21st, 1843. 



This forms patches upon the moist earth, like the preceding, 

 from which it is not to be distinguished without the aid of a 

 lens. The form of the capsules, as seen in the figures, is very 

 different from that of Vaucheria Dillwynii, and by it the 

 species may at once be known. I have only once met 

 with it. 



