178 BEV. J. M. CKOMBIE ON LICHENS 



Lecidea chalybeia, Borr. 

 On rocks ; probably common. 



L. chlorcpoliza, Nyl. 



On rocks ; only sparingly seen. 



L. contingens, Nyl., sp. n. Thallus cinerascenti-albidus tenuis 

 (crassit. circiter 0*2 millim.), laevigatas, rimoso-areolatus, areolis con- 

 tiguis, rimis nigris angustis, nigro-limitatus (K+, flavescens, dein fer- 

 rugineo-rubescens, etiam praesertimque medulla ita turn tincta, at 

 I — ); apothecia nigra, superficialia, plana, marginata (latit. circiter 0*5 



inillim.), intus concoloria; sporae 8nae, fuscae, ellipsoideae, 1-septatae 

 longit. 0-010-0-013 millim., crassit. 0004-0007 millim.; epithecium 

 obscuriuscule caerulescens ; paraphyses mediocres ; hypothecium fus- 

 cum. Iodo gelatina hymenialis caerulescens. Spermatia bacillaria, 

 longit. 0*005-0-006 millim., crassit. fere 0001 millim., sterigmatibus 

 subsimplicibus vel parum prolifero-articulatis, sat tenuibus. 



The characters of the spermogones indicate tliat this species 

 belongs to the section of L. superans 9 Nyl. ; but there is no thalline 

 reaction with CaCl. 



On rocks ; very sparingly gathered. 



L. halonia, Ach. 



On rocks; apparently not uncommon, usually associated with other 

 lichens. 



L. spuria (Schaer.). 



On rocks ; pretty frequent, but always associated with other lichens. 



With regard to the systematic place of this species, Nylander 

 observes in litt., " Forsan satius consideranda ut Lecanora ; nam 

 spermogonia vix diffornnt a spermogoniis stirpis L. sophodis. Est 

 verisimiliter Buellia antarctica, Mass. Lich. Cap. p. 68, t. iv. fig. 



18-32. 



i> 



L. incuriosa, Nyl., sp. n. Thallus albidus, sat tenuis, granulatus vel 

 granulato-subareolatus, inaequalis (K+, flavens) ; apothecia nigra, 

 demura convexa immarginata (latit. 0-6-0*8 millim.), intus concoloria 

 (strato hymeniali obscure in sectione cinerascente); sporae 8nae, fuscae, 

 1-septatae, longit. 0022-0-025 millim., crassit. 0-008-0011 millim.; 

 paraphyses subgracilescentes ; epithecium et hypothecium fusca. 

 Iodo gelatina hymenialis caerulescens, dein subincolor et thecae vinose 



subrubescentes. 



003 



millim., crassit. vix 0001 millim. attingentia, sterigmatibus vulgo ex 

 articulis saltern 2-3 constantibus parum tumidulis. 



A species but little striking in appearance, belonging to the 

 section of L. spuria. 



