CUYPTOGAMIA ALG.E. 251 



Hab. On damp ground in shady places, and on thatched 

 roofs, plentiful in and about Berwick. Winter and 

 spring. 



8. U. calophylla, fronds green, minute, tufted, linear, plane, 

 flexuose, marked with longitudinal and parallel beaded lines of 

 granules SPRENG. Syst. iv. 368. GREV. Alg. Brit. 176. Ban- 

 yia calophylla, GREV. Crypt. Fl. t. 220. 



Hab. On an old decayed piece of railing attached to a cot- 

 house in the Greenses, Berwick. 



I detected, not without a feeling of great pleasure and sur- 

 prise, this remarkably beautiful alga while examining 

 Lynybya muralis under the microscope. The fronds vary 

 greatly in their breadths, and are narrowed at the base. 

 The figure of GREVILLE is admirable. 



157- VAUCHERIA. 



1. V. terrestris, matted, grass-green, the surface coarsely velve- 

 ty or somewhat bristly ; filaments irregularly branched, pellucid, 

 or filled with a green matter ; vesicles solitary, lateral, hemisphe- 

 rical, on a horn-shaped peduncle. GREV. Alg. Brit. 191. 



Hab. On the ground in damp shaded places, rare. Under 

 shelving rocks on the coast, at the Coves. Spring. 



2. V. Dillwymi, fine green, hirsute, matted ; filaments rather 

 short, irregularly branched, pellucid or filled with a granular mat- 

 ter; vesicles solitary, sessile, globose or ovate, lateral. GREV. 

 Alg. Brit. 191 ; Fl. Edin. 305. Conferva frigida, DILLW. Conf. 

 t. 16. 



Hab. At moist hedge bottoms in the earliest spring. 



The vesicles are produced in great profusion, and I have seen 

 them at least apparently supported on a very short pedicle. 



3. V. caspitosa, deep green, in dense spongy masses, the surface 

 hirsute ; filaments irregularly dichotomous ; vesicles in terminal 



pairs, the summit of the peduncle projecting beyond them 



GREV. Alg. Brit. 194. HOOK. Scot. ii. 92. Conferva amphibia, 

 DILLW. Conf. t. 41. 



