38 W. NYLANDER. 



vigent vel solumquinta pars (1). Desunt species tribuum Lichi- 

 neorum, Myriangieoram, Baeomyceorum, Stereocaiileorum, Roc- 

 celleorum, Siphuleorum, Cetrarieorum, Peitigereorum, Gyropho- 

 reorum et Xylographideorum; sin olirn una alterave detegenda 

 sit. Plurimae species typum geographieum Polynesiensem expri- 

 mant, at accedunt haud paucœ Àustralienses [Cladonia Mulle- 

 riiy retipora, aggregata, Lecidea marginiflexa, etc.), pauciores 

 Javanicse (Leptogiurn sphinctrinum, Trypethelium megasper- 

 mum, etc.). 



Novae species in sequentibus descriplae numéro suht 18 ; cetera? 

 solum enumerafàe et quibusdam observationes additse. 



Trib. I. - COLLEMEl. 



1. Collema byrsinum Ach., Nyl. Syn. p. 113. — Ad cortices frequens 

 videtur (coll. Vieill, n° 1815). — Var. divisum Nyl. (thallo placodiiformi 

 minore), etiam corticola (Vieill.). Vide Prodr. N. Caled. p. 2. 



2. C. amphiurum Nyl. 1. c. — Subsimile prsecedenti, sed sporis (sim- 

 plicibus) utroque apice apiculo acuto munitis. — Ad cortices (Pancher). 



3. C. aggregatum Ach., Nyl. Syn. p. 115. — Coll. Vieill. n is 1817, 

 1819 (2). 



h. Leptogium tremelloiues Ach., Nyl. Syn. p. 12/i, et var. azureum 

 (Sw.). — Frequens videtur. 



5. L. thyllocarpum (Pers.) Nyl. Syn. p. 130.— Coll. Vieill. n 1 * 1814, 

 1816. 



6. L. sphingtrinum Nyl. Syn. p. 131 (et sit Stepkanophorus Ja- 

 vanicus Mnt. Syll. p. 379, Lich. Javan. p. 66). — Commixtum sub 

 n is 181/i, 1816. 



7. L. cyanescens Nyl. Syn. p. 131. — Ad cortices (Vieill.). 



(1) Ratio hsec vero haud parum mutabitur lichenibus saxicolis ri le exploratis, 

 qui (sicut alibi indicavi) latissima distributione geographica gaudent. 



(2) Hac occasione notare liceat C. glauoophlhalmum Nyl. 1. c. p. 144, esse 

 C. leucocarpu m Tayl. Lich. antarct. n. 144 (C. nigrescens var. leucocarpum 

 Bab, N.Zeal. p. 4 4). 



