60 GRAPHIDEÆ FEEANÆ. 
21. Arthonia stictiea Nyl. Enum. gén. p. 133; Lecidea stictica Kée Suppl. 
p. 103; similis À. angulatæ Fée, sed thallus olivaceo-virens et sporæ multo majores et 
a proxima Arthonia cyrtode Nyl. thallo lævi et apotheciis multo minoribus, diametro 
"ho /) MM. æquantibus (nec 1 ‘/, mm. latis) differt. — Sporæ in ascis late obovoi- 
deis amplis 8-næ, hyalinæ, vetustate demum rufo-obscuratæ, 70-80 y longæ, 
15-23 y latæ, utrinque paullo angustatæ, (10-)12-loculares, loculi duo intermedi 
modice majores. — In Antillis in cortice Exostemmatis floribundi (ad specim. Féean.). 
14. ARTHOTHELIUM Mass. Ric. p. 54; Th. Fries Heterol. p. 97; Sttzenb. 
Flechtensyst. p. 152. 
Ab Arthonia differt sporis parenchymaticis. 
* Sporarum locelli in series circ. 6-9 dispositi. 
l. Arthothelium abnorme Müll. Arg. L. B. n° 221; Opegrapha abnormis 
Acb. Univ. p. 259; Arthonia abnormis Nyl. Syn. Lich. Nov. Caled. p. 64; Coniocarpon 
caribœæum Fée Ess. p. 99 pr. p. — Apothecia exigua, irregulariter angulosa at obso- 
lete astroidea; sporæ in ascis cuneato-obovoideis 8-næ, hyalinæ, 11-18 y longæ, 
6-11 y latæ, superne latiores, obtusæ, 6-9-loculares, loculi 2-4-locellati. — Cincho- 
nicola (ad specim. Féean., Acharianum autem non vidi). 
** Sporarum locelli in series 12-18 dispositi. 
2. Arthothelium nucis Müll. Arg.: Arthona polymorpha + substéllata Fée 
Ess. p. 53 (dein in Suppl. p. 38 ad suam À. délatatam relata) ; simillima À. confertæ 
Nyl., sed thallus griseo-fuscidulus et apothecia madefacta nigra, nec distincte fusca ; 
juxta Arthothelium abnorme Müll. Arg. L. B. n° 221 (Opegrapham abnormem Ach.), cui 
affine, locandum est, et a quo differt colore thalli, apothecis paullo validioribus et 
sporis majoribus. — Lamina obscure fuscidula v. fusca; hypothecium nigro-fuscum; 
asci pro ratione in lamina magni, parum numerosi, globoso-obovoider, 8-spori; 
sporæ hyalinæ, 25-35 4 longæ et 12-15 L latæ, eximie parenchymatosæ, locelli in 
series transversales 12 dispositi, quaque serie 4-5 (in plano optico dicto). — In cor- 
tice Strychni nucis vomicæ (ad specim. Féean.). 
3. Arthothelium macrotheca Müll. Arg. L. B. n° 818; Arthonia macro- 
