68 PROF. T. 1£. FEIES ON THE LICHENS 



longae et 0004-0'005 mm. crassae ; gelatina hymen, iodo colore 

 caeruleo fugaee dilutissime tingitur. 



102. Mickotiielia melanostigma, n. sp. Crusta vix ulla; 

 aj3otheciis minutissimis, hemisphaericis vel depresso-subglobosis, 

 nigris ; amphithecio perithecium distinctum parenchymaticum 

 fuscum fere omnino includente ; sporis ex ascis cito ejectis, 8nis, 

 diblastis, ovoideis, loculo inferiore minore angustioreque, mox 

 obscuris, minutis. 



On stones in the vicinity of Floeberg Beach, very rare. 



Together with Rinodina aterrima, Krempel., Buellia anthracina, 

 Anzi, Mtcrothelia JHetzleri, Korb., Verrucaria scopularia, NyL, 

 and Mtcrothelia atratnentea, Norm., this little plant forms a very 

 natural group, the place of which in the system, as well as the 

 relation between the species above mentioned, will be examined 

 on another occasion. — iVpothecia 01-02 mm. lata, saxo nigro in- 

 sidentia ideoque non nisi lente valde augente detegenda ; amphi- 

 thecium sat crassum, microscopio inspectum obscure fusco- 

 nigrum, parenchymaticum ; paraphyses nullae distinct ae ; asci in- 

 flato-clavati, pauci, cito disrupti (sporas maturas ascis inclusas 

 invenire non potui); sporae utrinque obtusae, mox nigro-fuscae et 

 halone pertenui hyalino circumdatae, 0010-0014 mm. longae et 

 O005-O007 mm. crassae; gelatina hyalina iodo leviter caeru- 

 lescens. 



Appendix. 



Upon the lichens the following parasites have been ob- 

 served : 



* 



1. Leciographa conyexa, Th. F>\ Lich. Arct. p. 234. 



Mount Stephenson, on the thallus of Caloplaca elegans, which 

 was killed by it. The interior parts of the apothecia accord with 

 those of Buellia alboatra, as will be seen from the following descrip- 

 tion : — Hypothecium obscure fuscum ; paraphyses leviter cohae- 

 rentes, apicem versus saepe crassiores et capitulo nigricante ter- 

 minates ; asci inflato-clavati ; sporaD 8nae, ellipsoideae vel oblongo- 

 ellipsoideae, utrinque obtusae, primum tetrablastae, dein uno 

 alterove loculo longitudinaliter divisae, mox obscuratae, nigricantes, 

 0-012-0-021 mm. longae et 0007-0009 mm. crassae; gelatina 

 hymen, iodo caerulescens. 





