214 EET. J. M. CBOMBIE ON LICHENS COLLECTED 



21. Lecidea thtrsodes, Strn., sp. n. (As the diagnosis given 

 by Dr. Stirton of this species does not agree with the plant so 

 named on the fragmentary specimen, I have named this latter 



as follows.) 



L. heteeobola, Cromh., sp. n. Thallus albidus tenuis vel 

 tenuissimus continuus rugulosus, subrimulosus ; apothecia nigra 

 prominula submarginata (latit. circiter 0*5 millim.), intus strato 

 medio albido ; spora^ Snse incolores bacillares 7-septat3e, longit. 

 0-048-0'078 millim., crassit.0'002-0'003 millim.; paraphyses gra- 

 cilescentes, bene discretse, epithecium fuscescens, hypothecium 

 cum perithecio fuscum. lodo gelatina hymenialis vix tincta, 

 thecse dilute rosello-violascentes. 



Accedere videtur sporis suis ad stirpem Lecidece hacillifercey sed 



esse possit stirpis proprise distinctge. 

 On rocks : very sparingly seen, 



22. L. MTRIOCAEPA, DG. 



On rocks : a small fragment. 



23. Opegeapha undtjlata, >S/rw., sp. n. (Nihil autem " un- 

 dulatura " habet. Dicatur O. dialeuca, Cromb.) 



On rocks : very sparingly seen. Spores constantly 7-septate 

 O-O23-0'027 millim. long, 0*(X)6-0-007 millim. thick ; hypothecium 

 colourless ; perithecium black. A very distinct species of the 

 genus, differing in various respects from O. albo-aira^ Nyh Enum. 

 Gen, p. 131, which also, ex hb. Hooker, occurs in Cape Verde. 



Beehuda. 



1. Leptogium diaphan'um {8w.\ Ach. [=i. tremelloideSy var. 

 mesotomum, Strn.]. 



On the bark of trees. 



2. L. teemelloides, -4.cA. [ = Z. marginellvm]. 

 On the bark of trees : fertile and quite typical. 



3. Cladokta acuminata, * hebesceks, Nyl. " Differt a C. acu- 

 minata (Ach.) squamulis crassiusculis subconvexulis. Sterilis 

 modo visa. Forsan propria species." — Nyl, in litt. 



On the ground: very sparingly seen. 



4. C. FIBULA {Ach.) [=C. turgida^ et var. elegans]. 

 On the ground : fertile. 



5. C. MiTEULA, Tuck. [=C. lotrytes]. 

 On the ground : fertile. 



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