318 Transactions.—Botany. 
Lecidea stellulata, Tayl. (descrip. amend.) 
Thallus albus v. cinereus tenuissimus minutissime areolatus v. granu- 
losus hypothallo atro limitatus, sepius in agellos a hypothallo denudato 
metatus. Apothecia parva subimnata confluentia atra plana tenuiter mar- 
ginata, margine spe e granulis effuso. Spore in ascis ventricoso-clavatis, 
ovate fusce 1-septatae, longit. ‘012 mm., crassit. ‘006 mm. Hypothecium 
atro-fuscum. 
Ad saxa. 
Thallus white or greyish, very thin, minutely areolate or granular, 
bound by a black hypothallus, often marked off into small areas by the 
exposed hypothallus. Apothecia small, subinnate, confluent, black, flat, 
margin thin, often sprinkled with granules. Spores in ventricose club 
shaped ascus, ovate, brown, 1-septate, length ‘012 mm., breadth *006 mm. 
Hypothecium dark brown. 
On rocks. 
Lecidea petraa, Flow., v. Neo-zealandica, Knight. 
Thallus cinereo-plumbeus minute granulosus, hypothallo nigricante 
inter granula denudato enatus. Apothecia sat parva plana crebra, disco 
aterrimo nudo elevato-marginato, margine primum e granulis minutis 
suffusis—tandem fusco-atro. Spore in ascis ventricosis 3-5-septatae, et 
septa transversa septulis longitudinalibus v. obliquis juncta, subhyalinae 
tandem dilute fuscae, longit. 023 mm., crassit. 009 mm. Hypothecium 
fusco-nigrum. 
Ad muros. 
Thallus greyish-lead colour, minutely granulose sprung from @ black 
hypothallus denuded between the granules. Apothecia somewhat small, 
int, numerous, disk very black, naked, margin raised, at first suffused with 
minute granules, at length brownish-black. Spores im a ventricose ascus, 
8-5 septate, the septa joined longitudinally or obliquely by short septa, 
length 023 mm., breadth -009 mm. Hypothecium brownish-black. 
On walls. 
_ Fig. 10. Section of apothecium magnified 14 diameters. 
10. aand b, Ascus and spores ,, 300 pes 
Lecidea petraa, Flot., v. violacea. 
Thallus minute tuberculosus, tubercula violacea, hypothallo nigricante. 
Apothecia parva creberrima nigra innata v. adnata concaviuscula immargl 
nata. Spore fuscae 5-septatae, septa transversa septulis longitudinalibus V- | 
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