BOTANY 



RHODOPHYCEAE {continued) 



Nemastomaceae 

 Schizymenia Dubyi, J. Ag. 7 

 Halarachnion ligulatum, Kutz. I, 5-7 

 Furcellaria fastigiata, Lamour. i, 5-7 



Rhizophyllaceae 

 Polynoides rotundus, Grev. i> S-7 



Squamariaceae 



Erythrodermis AUeni, Batt. 7 

 Rhododermis elegans, Cm. 7 



— Georgii, Holmes. 6 

 — :• parasitica, Batt. 7 

 Rhododiscus pulcherrlmus, Cm. 7 

 Petrocelis cruenta, J. Ag. I, 6 

 Cruoria pellita, Lyngb. 7 



— rosea, Cm. 7 

 Cmoriopsis gracilis, Batt. 7 



— Hauckii, Batt. 7 

 Cruoriella Dubyi, Schm. 5, 6 

 Peyssonelia Harveyana, Cm. 7 



— Rosen vingii, Schm. 5, 7 



— rubra, J. Ag. 7 



— rupestris. Cm. 7 



RHODOPHYCEAE {continued) 



Hildenbrandtiaceae 



Hildenbrandtia Crouani, J. Ag. 6 



— prototypus, Nardo. i, 5-7 



Corallinaceae 



Schmitziella endophloea. Born, and Batt. 6 

 Choreonema Thureti, Schm. 5 

 Melobesia callithamnioides, Falk. 6, 7 



— Corallinae, Solms. 5-7 



— farinosa. Lam. i, 5-7 



— Lejolisii, Rosenv. 7 



— zonalis, Fosl. 7 

 Dermatolithon hapalidioides, Fosl. 5, 6 



— Laminariae, Fosl. 6 



— macrocarpum, Fosl. 5-7 



— pustulatum, Fosl. 7 

 Lithophyllum corticiforme, Fosl. 1,5-7 



— incrustans, Fosl. 5-7 



— Lenormandi, Fosl. i,S~7 



— lichenoides, Fosl. 5-7 



— membranaceum, Fosl. I, 5-7 

 Phymatolithon polymorphum, Fosl. I, 5-7 

 Corallina officinalis, L. 1,5-7 



— rubens, Ellis and Soland. i, 5-7 



var. corniculata, Hauck. 5-7 



— squamata, Ellis. 5—7 



LICHENES (LkAem) 



The county of Devon, like that of Cornwall, is especially suited to 

 the growth of lichens, which require a moist atmosphere and pure air for 

 their development. It has the advantage over Cornwall of a greater 

 variety of geological strata, so that the species occurring on limestone are 

 more numerous, and those occurring on the higher elevation of Dartmoor 

 are more subalpine in character. In Jones and Kingston's F/ora Devoniensis 

 142 species are enumerated. In the Lichens of Devon and Cornwall 

 by Mr. E. M. Holmes, published at Plymouth in 1869, the number was 

 increased to 346. 



A few rare species have been detected by lichenologists visiting the 

 county, of whom may be mentioned the Rev. J. M. Crombie, and the late 

 Dr. H. B. HoU, Professor Dickie of Aberdeen, and Admiral Jones, but 

 the majority of species added to the Flora since the publication of the 

 Flora Devoniensis in 1829 have been detected by Mr. E. M. Holmes, 

 Mr. E. Parfitt, Mr. E. D. Marquand, and Mr. W. H. Wilkinson. 



Amongst the rarer species found on Dartmoor and its ravines may 

 be mentioned Stictina T'houarsii, and S. crocata ; Umbilicaria pustulata, the 

 fruit of which is of very rare occurrence, but has been met with on 

 Cosdon Beacon and Kis Tor ; and Leptogium Burgessii. The warmer 

 portions of the coast line, including Torquay, Bolt Head, and Lynmouth, 

 are remarkable for a large number of rare species that are almost unknown 

 north of the Channel Islands and Cornwall. Of these may be mentioned 

 Stigmatidium venosum, Parmelia olive tor urn. Roc eel la phycopsis, and i?. fuci- 

 formis, the last two apparently finding their northern limit at Lynton. At 

 Torquay, Dirina repanda, Sticta aurata, Physcia chrysophthalma, Placodium 



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