Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 17 



instructus, umbilicatus et gompho vel gomphis pluribus 

 substrato affixus, adpressus aut rarius adscendens, modice 

 incrassatus, superne cinereus vel' pallido- aut livido-cinera- 

 scens aut subalbidus, pruinosus, subtus pallidus aut rarius 

 fuscescenti-obscuratus, haud [pruinosus, superne subtusque 

 vulgo laevigatus. Stratum medullare hyphis partim conglu- 

 tinatis. Sporae ellipsoideae oblongaeve. 



Distr. Supra saxa granitica aut calcaria in rivulis aut 

 locis irrigatis. Nylandia: Dickursby (W. Nyl., J. P. Norrlin, 

 Vain.). Regio Aboensis: Kiviniemi in Lohja (S. 0. Lindberg). 

 Tavastia austr.: Myllykyla in Tammela (A. Kullhem), Onki- 

 salo in Luhanka (Vain.). 



In D. miniatum transire videtur, vix nisi thallo minore ab 

 eo differens. Thallus siccus crass, circ. 0. 220— 0.360, humidus 

 circ. O.300 — 0.360 mm. Stratum corticale superius circ. O.020 mm 

 crassum. Stratum corticale inferius circ. O.040 — 0.060 mm eras- 

 sum. Stratum medullare hyphis O.003 mm crassis, sat leptoder- 

 maticis, partim conglutinatis. Apothecia crebra. Perithecium 

 albidum pallidumve, margine ostiolari obscurato vel cinereo- 

 fuscescente, superficiem thalli haud superante aut verruculam 

 leviter prominentem, O.15 — O.25 mm latam formante. Nucleus jodo 

 caerulescens. Paraphyses in gelatinam diffluxae, striis saepe 

 indicatae. Periphyses numerosae, elongatae, long. O.040 — O.045, 

 crass. O.002 — O.003 mm, increbre septatae. Asci oblongi aut clavati 

 aut subcylindrici, long. O.040 — O.055, crass. O.12— O.ie mm, mem- 

 brana modice incrassata, gelatinosa. Sporae 8:nae, distichae, 

 decolores, oblongae aut ellipsoideae, apicibus obtusis aut rotun- 

 datis, long. O.010 — O.oie, crass. 0. 005— 0. 0075 mm („long. O.oie — O.018, 

 crass. 0.007—0.008 mm" sec. Nyl.), saepe 2 guttulas aut unam 

 guttulam magnam continentes, membrana tenui aut sat tenui. 

 Conidangia in eodem thallo cum apotheciis visa, thallo immersa, 

 lacerato-cavernosa. Conidia cylindrico-oblonga, apicibus rotun- 

 datis, recta, long. O.004 — O.007 mm. 



Obs. Dermatocarpon leptophyllum (Ach.) Vain. (Lichen leptophyllus 

 Ach. Lich. Suec. Prodr., 1798, p. 141, Endocarpon leptophyllum Ach. Meth. 

 Lich., 1803, p. 127, tab. 3 f. 3, Lich. Univ., 1810, p. 302, Syn. Lich., 1814, 

 p. 102 p. p.) autonoma est species, sporis globosis et periphysibus 

 brevissimis a D. meiophyllo Vain., quocum commixtum est, differens. 

 Thallus lat. 7—9 mm, humidus crass. O.210 mm et ad apothecia O.400— O.350 

 mm, superne fuscescens aut partim cinereo-pallescens, haud distincte 

 pruinosus, subtus fuscescens, gompho affixus, sat adpressus, margine 



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