732 BULLETIN DE L'HERBIER BOISSIER. (8) 



sima, 5 - 10 /ioo mm. tantum lata, orbicularia et angulosa, annulo lhallino tu- 

 menle albicante et demum pulverulento et cum aliis confluente cincta, 

 plana, nuda et fusca ; epithecium fuscum, lamina ceeterum hyalina ; sporne 

 in ascis obovoideis 8-nee, hyalinee, elongato-obovoideee, 23-27 p longée et 

 10-12 i>. latee ; 5-loculares ; loculus superior major. — Affinis est A. cir- 

 cumalbicanti Nyl., ubi apothecia majora et sporee minores sunt. — Corti- 

 cola, Cuba.: Ch. Wright, Ser. II, 569. 



19. Arthonia symmicta Müll. Arg. ; thallus albus, tennis, leevi- 

 gatus et continuus, demum subtiliter rimulosus, superficie leevis ; apothecia 

 20 - 23 /ioo mm. lata, orbicularia, regularia aut paullum angulosa, solitaria v. 

 demum pauca in séries rectas et subcurvulas hinc inde angulosas con- 

 fluentia, novella albo-pruinosa, dein nuda et fuscescenti-carnea, demum 

 pleraque omnino nigra ta ; spone in ascis globoso-obovoideis 8-nee, 14-17 p 

 longée, 472-572 p latee, 5-loculares; loculus superior major. ■ — Apothecia 

 nondum nigrata quandam similitudinem offerunt cum iis Lecanorœ sym- 

 mictse et L. sarcopseos Auct. - Juxta A. gyalectoidem Müll. Arg. et A. cir- 

 cumalbicantem Nyl. inserenda est. — Corticola, Cuba : Ch. Wright, n. 133. 



20. Arthonia subvaria ; thallus argenteo-albus, tenuissimus, leevi- 

 gatus; apothecia linearia, simplicia, 1 /s-{ mm. longa, 12 - 2 %oo mm. lata, 

 subrecta et arcuata, obtusa, e nigrescenti-fusco demum nigrata seepeque 

 bicoloria, emergentia ; sporee 8-nee, circ. 17-22 p longée et 7 y- latee, 5-6- 

 loculares; loculus superior reliquis major. — Est simillima A. gracüi 

 (Eschw.) Müll. Arg., sed apothecia sunt leviter validiora et sporee 5-6-locu- 

 lares. — In cl. Willeyi Arthon. sub n. 78 sine characteribus enumerata 

 est. — Corticola, Cuba : Ch. Wright, n. 1336, 118 pr. p. 



21. Arthonia polygramma Nyl. in Prod. Nov. Gran., p. 99; Wil- 

 ley Syn. Arlhon., n. 75 ; fere cum A. subnovella Müll. Arg. L. Parag., n. 

 195 quadrat, sed apothecia tenuius compacto-breviradianlia et conferta. 

 Sporee 4-loculares et 5-loculares, loculus superior major. — Ch. Wright, 

 n. 120a, f, k, et secundum Willey b et d, 125a, d, 136, 139. 



22. Arthonia compensata Willey Syn. Arthon., n. 58 ; thallus 

 albus, tenuis, rimulosus et superficie subfarinosus ; apothecia linearia, 

 1-1 72 mm. longa, V 6 - 1 /^ mm. lata, simplicia et parce breviramulosa, flexu- 

 osa, primum lhallino-pulverulenta et immersa, demum nudato-nigra et 

 leviter emergentia ; asci globosi, 8-spori ; sporee hyalinee, elongato-obovoi- 

 deee, 20-25 f- longée et 7-8 y- latee, 6-loculares ; loculus superior reliquis 

 major, inferiores sensim minores. — Inter A. Costaricensem Müll. Arg. 

 et A. rubellam Nyl. Arthon., p. 89 locanda est. A priore recedit ramis apo- 

 theciorum mullo crassioribus, haud insculpto-concavis, ab origine magis 

 fusco-nigricantibus, et a posteriore apotheciis magis obeso-ramosis, longe 



