CRYPTOGAM I A. 4df 



teptacuhim for his apothecium, pedkellus 

 for his bacillum or podetium, and semina 

 for his spora, because I see no improve- 

 ment in the change. When this or any 

 other writer strikes out new ideas, and 

 discriminates parts hitherto mistaken or 

 unknown, we thankfully receive from him 

 new terms to express his discoveries. Thus 

 the cyphtlla of Acharius is a peculiar sort 

 of pit or pore on the under side of the frond 

 in that section of Lichens called Sticta, see 

 Engl BoL t. 1103, 1104; his lifellce are 

 the black letter-like receptacles of the ge- 

 nus Opegrapha, t. 1753 — 1756; his triced 

 the analogous parts, resembling a coiled 

 horse-hair, in Gyrophora^ the Umbilicaria 

 of Hoffmann, t. 5 C 22. These terms are 

 necessary and instructive, and are chosen 

 with that accuracy and taste for which 

 Dr. Acharius is conspicuous* 



The aquatic or submersed A Igcs form a 

 distinct and peculiar tribe. Some of these 

 abound in fresh water, others in the sea, 

 whence the latter are commonly denomi- 

 nated sea-weeds. The chief genera are 

 Viva, t. 419, 420, 1276, well defined tfy 

 2 K 



