538 CHIODECTONACEAE. 



5. Chiodecton crassum (DC.) Zahlbr. in Engler and Prantl, Nat. Pflanzenfam. 



I 1 *: 104. 1905. 

 OpegrapJia cra-ssa DC. Fl. Franc. 2: 312. 1805. 



On bark, New Providence, at Maidenhead Coppice ; Europe ; northern Africa ; 

 Japan. Not previously recorded from North America. 



6. Chiodecton Bracei Riddle, sp. nov. 



Tkallus epilithicus crustaceus uniformis subdeterminatus maculas 3-15 

 mm. diam. formans baud linea nigra limitatus, argillaeeus aut albus, in cras- 

 situdine mediocris, crebre contextus continuus laevigatus undulatus. Gonidia 

 chroolepoidea. Stroma nulla. Apothecia dispersa aut rarius aggregata thallo 

 immersa punctifonnes aut difformia aut partim elongata, 0.1-0.5 mm. longa, 

 simplicia, disco sicco nigro madefacto badio, nudo piano superficiem thallo 

 subaequante, margine tenuissime s*purie thalliuo aut margine evanescente; epi- 

 thecio fuscescente ; hymenio et hypothecio incolore. Paraphyses crassiusculae 

 ramoso-connexae. Asci .clavati 8-spori. Sporae incolores fusiformes 4-loculares 

 loculis cylindricis aequalibus, 14-20 X 4^. 



On limestone. New Providence (Brace, June 16, 1918, 9513, type). Also, Wat- 

 ling's Island, vicinity of Cockburn Town (Britton and MUlspaiic/h. 612Sa) . 



Chiodecton Bracei, belongs to the section Enterographa. It differs from C. rufes- 

 cens Wainio (Journ. Bot. 34: 262. 1896) in having simple apothecia which are more 

 often punctate or difform than elongated. I take pleasure in naming this species in 

 honor of Mr. Brace, whose collections have greatly extended our knowledge of the 

 lichens of the Bahamas. 



2. SCLEROPHYTON Eschw. 

 1. Sclerophyton elegans Eschw. in Mart. Fl. Bras. 1: 103. 1833. 



Stigmatidium elegans Nyl. Bull. Soc. Linn. Norm. II: 3: 274. 1869. 



On bark, New Providence, along Soldier's Road : Florida ; Bermuda ; Cuba ; 

 Guadeloupe ; Brazil. 



Easily confused with species of Arthonia; as the stroma is by no means obvious. 



3. GLYPHIS Ach. 

 1. Glyphis cicatricosa Ach. Syn. Lich. 107. 1814. 



Glypliis Acliariana Tuck. Amer. Journ. Sci. 25: 429. 1858. 



On bark of various species, and at various localities, Great Bahama, New Provi- 

 dence, Watling's Island : one of the commonest of tropical lichens. 



4. SARCOGRAPHA Fee. 



1. Sarcographa tricosa (Ach.) Muell. Arg. Mem. SQ.C. Phys. Hist. Nat. Geneve 

 29 s : 63. 1887. 



Graphis tricosa Ach. Lich. Univ. 674. 1810. 



On bark, New Providence, and Long Island : widelv distributed in tropical re- 

 gions of both hemispheres. 



Family 4. DIRINACEAE. 



1. DIRINA Fr. 



Growing on rocks. 1. D. rcpanda. 



Growing on bark (of Jacquinia keyensis) . 2. D. ceratoniae. 



1. Dirina repanda (Fr.) Nyl. Act. Soc. Linn. Bordeaux 21: 343. 1856. 



Parmelia repanda Fries, Lich. Europ. 177. 1831. 



On limestone, New Providence, near Queen's Staircase, Nassau ; Great Exuma, 

 along Haynes Road ; Long Cay, on Cunningham Hill : southern Europe and northern 

 Africa, Hawaii. India. The occurrence in the Bahamas of this species, not previously 

 known from North America, was recorded in the Bryologist (21: 50. 1918). 



