50 
MR. CHARLES KNIGHT ON THE 
51. RAMALINA SUBGENICULATA, sp. п. Thallus exspitosus glauco-albidus, laciniis fasti- 
giatis compressiusculis, madefactis turgidis omnino cavis erectis passim tuberculosis 
sublaeunosis minute foraminatis apice ssepe fructuosis v. parce dichotome ramosis, 
intus coria fibrillosa, ramis brevibus attenuatis, gonidiis nucleo centrali instructis. 
Apothecia terminalia subpedicellata, e laciniis turgidis orta, concava, pallida, excipulo 
mere thallodi marginata, paraphysibus adglutinatis apice non dilatatis. Spore 
oblongze, nonnull incurvate, normaliter 1-septatze, interdum quasi 3-septatee, hya- 
Поге, longit. "013, crassit. “005 mm. Ad cortices arborum. 
52. RAMALINA CALICARIS, L. 
Z 
© 
NP юк 
19. 
20. 
21. 
49; 
DESCRIPTION ОЕ THE PLATES. 
PLATE VII. 
Stigmatidium maculatum : two spores, x 950. 
. Graphis subintricata : (а) thin section of apothecium, x 40; (b) a spore, x 950. 
. Graphis subtricosa: a spore, x 950. 
Graphis aulacothecia : two spores, x 950. 
Verrucaria tichospora : (a) three spores, x 950; (b) thin section of apothecium, x 40. 
Parmelia spherospora : ascus and spores, x 950. 
. Stigmatidium velatum: (a) four apothecia, x 40; (4) thin section of three apothecia, x 40; 
(c) three spores, x 950. 
Verrucaria sorenocarpa : (a) section of four apothecia, x 40; (b) ascus and spores, x 950, the 
space between the sides of the ascus and the spores is filled with a delicate network. 
Verrucaria zostra : (а) two spores, x 950; (а section of apothecium. The apothecium rests on 
the matrix. "Thallus seen as a thin white lamina. 
Physcia melanoclina: (a) section of apothecium, x 40; (b) spore, x 950. 
. Graphis eleina : four spores, x 950. 
. Verrucaria rhaphispora: ascus and spores, х 950. 
Platygrapha albovestita : spores and asci, x 950. 
. Lecidea (Aphtholoma) conspicua: (a) section of apothecium, x 40; (4) spores and ascus, x 950. 
. Arthonia nympheoides : spore, x 950. 
. Stigmatidium nanocarpum: (a) section of apothecium, x 40; (6) ascus, spores, and two para- 
physes, x 950. 
Opegrapha megagonidia : (а) ascus and spores, x 950; (b) two gonidia, x 950. 
. Chiodecton stromaticum : (a) three spores, x 950; (6) section of verruca, x 40. 
Puate VIII. 
Stigmatidium heterogenum : (a) section of apothecium, x 40; (5) ascus and spores, x 950. 
Stigmatidium stictathecium : (a) two spores, x 950; (b) two apothecia, x 40. 
Lecidea entocosmesis (a) : ascus and spores, x 950; (5) section of apothecium, x 40. 
Lecidea metaphragmia: (a) four spores, x 950; (5) section of apothecium, x 40. 
