LICHENES IN INSULA TRINIDAD. 139 



rubescens. Perithecium tenue, latere fuligineum, basi albidum. 

 Sporae binae aut raro solitariae, murali-divisae, obscuratae, long. 

 0.045-0.084, crass. 0.018-0.025 mm. Sporae saepe binae etiam in 

 specim. orig. see. annot. Nyl. 



Ad corticem arborum. Maraval Valley (Nos. 13 and 15). 



29. Graphis (Phaeographis) haematites Fee. 

 Ad corticem arboris. La Seiva Valley (No. 71). 



30. Graphis Sangrensis Vain. (sp. n.). Thallus bene evolutus, 

 modice incrassatus aut sat tenuis, laevigatus, stramineo-glaucescens, 

 leviter nitidus, KOH demum intense ferrugineo-rubescens, partim linea 

 hypothallina nigricante limitatus. Apothecia elongata, long. circ. 

 4-7, lat. 0.3-0.4 mm., flexuosa curvatave, increbre dichotome vel varie 

 ramosa, subsolitaria aut parce aggregata, leviter elevata aut subim- 

 mersa, apicibus obtusis aut attenuatis. Discus dilatatus, planus aut 

 leviter concavus, cinereus, pruinosus, margine albo, discum vulgo 

 superante, cinctus. Perithecium tenue, subpallidum et partim fus- 

 cescens, aut evanescens. Hymenium circ. 0.090 mm. crassum. 

 Sporae 4:nae, cylindricae, apicibus obtusis aut rotundatis, fusces- 

 centes, septis transversis 5, long. circ. 0.027, crass. 0.009 mm. 



Affinis Gr. medusaeformi Kremplh. (Vain. Etud. Lich. Bres. II, p. 

 115). Gr. inusta Ach. sec. herb. Ach. thallo tenuissimo, KOH haud 

 distincte reagente, apotheciis brevioribus, tenuiter pruinosis et sporis 

 5-septatis, 8:nis ab his distinguiter. 



Ad corticem arboris. Sangre Grande (No. 88). 



31. Graphis tricosa Ach. 



Ad corticem arboris. Maraval Valley (No. 93). 



32. Graphis labyrinthica (Aeh.) Vain. var. quatuorseptata 

 Vain. Lich. Ins. Philipp. Ill, p. 230. Sporae in eodem apothecio 

 3-4-septatae, long. 0.015-0.017, crass. 0.007 mm., fumoso-obscuratae. 



Ad corticem arboris ( Theobroma cacao). Sangre Grande (No. 78). 



33. Graphis Feei (Messn.) Vain. 1. c. p. 229. Sporae 3-septatae, 

 long. 0.014-0.017, crass. 0.007 mm., fumoso-fuscescentes. 



Ad corticem arborum ( Theobroma cacao etc.). Sangre Grande (No. 

 82 pro parte). Maraval Valley (No. 24). 



34. Graphis difformis Vain. 1. c. p. 233. Vix nisi sporis 5-septatis 

 a Gr. heteroclitica (Mont.) Vain, differt. Thallus, sicut etiam in 

 specim. orig. KOH demum rubescens. 



Ad corticem arboris ( Theobroma cacao). La Seiva Valley (No. 53). 



