r 



27 



4DDENDA.il 



Sii -ere written, the fallowing additional 



Nations have occurred t<> the author: 



Page 19, n. 51. /. r'ni f *uis. 

 This Bpecies lias been found by me this year in elegant 

 fructifications, and as large as any European specimens. 

 The setae proceed from the lower surface, and are upward 

 of an inch long, and very thick. 



Page 21. n. 2. Mdrchantia polymorpha. 



Found here on Muddy Creek in plenty. 



Remark. — Two new species of Marcbantia have been 

 dis4 overed by me this year, of which the description how- 

 cannot he inserted. 



Page 23. Turgioma. 

 I have found the Taugioma hypophylla in an exca- 

 vated spring-house, in great perfection and full fructifica- 

 tion in February, 1821, so that this species must now be 

 inserted. 



§.£. T. CaPSUXA GEOBOsA, CAXTCI BIVALYI UrSIDBJTS, BjpopkyUa 

 POLYSPERMY FbONDIBUS 8IMLLIBU8 MARCH 1NTIIS- Li 

 MAG.NI>, I.N t AESPITEM COLLECTIS, SUPRA LAETB VI- 

 RIDIBU8, VEBBUCIS ALBIDIS MINIMIS ADspEUSIS, 

 i HTl s MfiKii -ANTIBUS, VII, LIS RADICUXOSI8 TBBJUX 

 UTOIS. Roth. p. 423. Schwg. p. 35. Web. p. 108. 

 v. v. Coll. Europ. * 



It grows in large tufts, like the Marchant. hemisphae 



rica, on the excavated rock. 



Page 24. Spiiaeuocakpi>. 

 Having continued my observations on this remarkable 

 s, I bad the pleasure, in March, 18:21, of finding it 

 with complete capsules, perfectly answering the descrip- 

 tion. The Capsule is globose, filled with minute seeds, 

 at first green, then blackish, at the bottom of the Calyx, 

 and about half* a> large. It soon mi 

 rably. 



