532 ASTEOTHELIACEAE. 



acutae, 3-septatae, ad septa modice constrictae, loculis lentiformibus, 18-22 

 X 8-9/1. 



On bark in coppice, West End, Great Baliama {Brace. April 16-May 8, 1905. 

 S615, type). 



Parathelium microcarpum has smaller spores than any other species of the genus, 

 with the exception of P. decumiens Muell. Arg. (Hedwigia 32: 134. 1893) which 

 differs from the present species in the whitish thallus and the larger perithecia. 



2. CAMPYLOTHELIUM Muell. Arg. 



1. Campylotlieliiun decolorans Riddle, sp. nov. 



Thallus epiphloeodes crustaceus uniformis effusus stramineo-albus subni- 

 tidus, tenuis vel tenuissimus, continuus laevigatus inaequalis. Gonidia ehroole- 

 poidea. Perithecia circa 1.0 mm. lata, tota thallino-eorticata parum promi- 

 nentia, quasi maculam fuscescentem formantia, superne nigra, inferne decol- 

 orata, ostiolis lateralibus collis nuUis. Paraphyses persistentes satis ramosae. 

 Asei 2-6-spori. Sporae incolores oblongae medio leviter constrieto irregulariter 

 murali-divisae, 6^8-loeulares, loculi 3— i-looellati, loculis eubicis aut irregu- 

 laribus, 37-43 X 16-18 /i. 



On bark of Drypetes, Cay North of Wide Opening, Bxuma Chain {Britton and 

 Millspaugh, February 18, 1905, 2795, type). 



This species differs from other species of the genus in the pale color of the 

 lower part of the perithecial wall. 



Family 6. ASTEOTHELIACEAE. 



Spores colorless, plurilocular. 1. Lithothelium. 



Spores brown, muriform-multilocular. 2. Parmentaria. 



1. LITHOTHELIUM Muell. Arg. 



1. Lithothelium 'bahamense Eiddle, sp. nov. 



Thallus epilithious crustaceus uniformis effusus linea nigra limitatns, 

 glaucus aut ciuereus opaeus, crassiusculus crebre contextus, continuus laevi- 

 gatus. Gonidia chroolepoidea. Stromata minuta, 0.4-0.6 mm. lata, in foveolis 

 saxi innata, dein semi-emergentia, demum elabentia foveolamque relinquentia, 

 tota nigra parte emersa nudata, paueicarpica, ambitu oblonga aut satis dif- 

 f ormia, ostiolis minutis irregulariter umbonatis. Perithecia ■ minutissima, 

 integra nigra. Paraphyses persistentes simplices filiformes. Asci cylindrices, 

 8-spori. Sporae in asois 1-2-seriales, incolores, fusiformes, 8-loculares, loculis 

 cylindricis, 18-22 X 5-6n. 



On limestone, vicinity of Cockburn Town, Watling's Island (Britton and Mills- 

 paugh, March 13, 1907, 6127, type; ai29). 



Lithothelium l>ahavient^e differs from the only other known species of the genus, 

 L. cubanum Muell. Arg. (Bot. Jahrb. 6: 386. 1885), in the color of the thallus and 

 the eight-celled spores. ' 



2. PABMBNTAEIA F6e. 



1. Parmentaria astroidea Pee, Essai Crypt. 70, pi. SO, f. 1. 1824. 



On bark. New Providence, at Clifton Coppice, and Crooked Island, at Yauxhall :— 

 widely distributed in tropical and subtropical regions. 



Order 2. OALICIALES. 

 Family 1. CALICIACEAE. 



1. CALICIUM f-ers. 



1. Calicivun hyper611um Ach. Meth. Lich. 93. 1803. 



Lichen hyperellus Ach. Lich. Sueo. Prodr. 85. 1798. 



On palmetto, The Bight, Cat Island : — widely distributed in North America 

 and Europe. 



