COLLECTED DURING THE ENGLISH POLAR EXPEDITION. 363 



validiusculis, laxe cohaerentibus, fuligineo-clavatis ; sporis ininutis 

 vel submediocribus, ellipsoideis. 



On stones in the vicinity of Floeberg Beach. 



A scarcely remarkable form, most resembling poor forms of 

 Z. lapicida, or still more of L. auriculata. From both it differs 

 by hyphae non amyloideae ; other essential characters may be ob- 

 tained from the apothecium, the paraphyses, and the size of the 

 spores. Thallus K — ; apothecia circ. 1 mm. diam. metientia, 

 vulgo regularia, omnino atra, margine incurvo ; asci clavati ; sporse 

 8na>, 0-009-0*012 mm. longae et 0005-0000 mm. crassae ; gelatina 

 hymen, iodo intense persistenterque cserulescens. 



With this species may perhaps be united an evidently abnor- 

 mal Lecidea from Walrus Island, Franklin-Pierce Bay, much 

 infested by JEndococcus pygmceus, with indistinct hypothallus, a 

 rather more developed thallus, forming small separate or confluent 

 spots on the stone, and few convex apothecia. The internal struc- 

 ture does not differ. 



- 79. Lecidea ultima, n. sp. Crusta tenuissima, disperse ver- 

 rucosa, albida ; apotheciis parvis, sessilibus, diu planis et tenuiter 

 marginatis, demum leviter convexis immarginatisque ; hypothecio 

 obscure rubricoso ; paraphysibus gelatinam fere libere percur- 

 rentibus, aliis gracilibus, aliis validis et capitulo clavave majus- 

 cula fuscescente instructis ; sporis minutis, breviter ellipsoideis 

 vel subglobosis. 



On stones from several localities around Floeberg Beach ; a few 

 apothecia at every place, mingled among other lichens. 



Belongs to the group of L. sylvicola ; but is distinguished from 

 all affined species by the nature of the paraphyses and the size of 

 the spores, as well as the gelatina hymenea, by iodine intensely 

 and permanently bluing. — Apothecia diam. ad 06 mm. lata, atra 

 vel raro tenuissime albo-pruinosa. Thecium plus minus (prae- 

 cipue apicem versus) caerulescenti- vel olivaceo-obscuratum ; pa- 

 raphyses apice articulatae ; asci subcylindrici ; sporae fere unise- 

 riate, 0-006-0008 mm. longae et 0005-0006 mm. crassae vel sub- 

 globosae, diam. 0006-0'007 ram. 



80. Lecidea (non determinanda). 



On sandstone in the vicinity of Floeberg Beach j only 3-4 apo- 

 thecia among other lichens. 



Probably not yet described ; but to propose a new species 

 upon only a few apothecia seems to me rather too aiida- 



