282 МВ: C. KNIGHT ОМ NEW-ZEALAND LICHENS. 
STICTA CANALICULATA, Sp. nov. 
Thallus glauco-pallescens late expansus (latit. usque pedalis) rigens vix nitidiusculus levis 
lineari-laciniatus canaliculatis, laciniis insignius sinuato-pinnatifidis, subtus totus 
tomentosus luteo-fuscescens, cyphellee albidze suburceolatze mediocres v. majuscule. 
Apothecia badio-rufa v. fusca (latit. 5 mm.) margine crenulato, receptaculo granulato. 
Sporæ leviter fuscescentes fusiformi-oblonge uniseptatse, longit. 0025 mm., crassit. 
0:01 mm. 
Obs. Much stouter than S. variabilis, and differs from S. damecornis in the white larger 
cyphelle, the channelled laciniz, and the under surface entirely covered by a brown 
tomentum. 
PLACODIUM ILLITUM, sp. nov. (Plate XXXVIII. fig. 13.) 
Thallus contiguus determinatus fusco-cinerascens v. sordide albus arcte adnatus levis v. 
in centro minute granulosus in ambitu non radioso-sublobatus sed minutissime 
crenatus gonimicus вере cephalodiis fusco-luteis radiatim onustus. Apothecia crebra 
v. conferta unde per mutuam pressionem tandem difformia, margine cinerascente v. 
albo subinde evanescente, disco fusco-nigrescente concavo per setatem plano et mar- 
ginem subeequante. Paraphyses discretæ. Spore in ascis elongato-cylindraceis 
uniserialiter octonæ lutes ellipsoideze, longit. “0192 mm., crassit. '007 mm. Hypo- 
thallus fuscus. АЯ lapides. 
Differs from P. gelidwm, Ach., in the darker non-lobate thallus, in the colour of the 
disk, and the thinner margin of the apothecia, and the dark brown hypothallus. Р. 
Rhuderi has an albido-lutescent and lobate thallus, the disk of the apothecia atro-pruinose, 
and the spores not exceeding “008 mm. in length. 
PLACODIUM ARGILLACEUM, sp. nov. (Plate XXXVIII. fig. 14.) 
Thallus cinereo-albus farinaceus polline albo obsitus continuus indeterminatus. Cephalo- 
dia carnea centrali radiatim rimosa.  Apothecia urceolata disco carneo, margine 
crasso albo farinaceo. Spore in ascis elongato-cylindraceis uniserialiter octonze 
ellipsoideze, longit. "016 mm., crassit. "008 mm. Supra terram. 
| PLACODIUM LECANORINUM, sp. nov. (Plate XXXVIII. fig. 15.) 
Thallus albido-cinerascens continuus determinatus arcte adnatus tenuis levis v. subgranu- 
lato-pulverascens. Cephalodia copiosa fusca v. fusco-atra madefacta indistincte 
radiatim rugosa. Apothecia sordide carnea concava, margine albido interdum fari- 
пасео, paraphysibus distinctis. Spors іп ascis elongato-clavatis obovate 3-septate, 
longit. “018 mm., crassit. "006 mm., hyaline v. pallide luteæ. — Zypothallus pallide 
fulvus. Ad lapides. 
