no 



The Irish Naturalist. 



"February, 



' Polysiphonia macrocarpa, Harv. 



P. fibrata, Harv. 



P. urceolata, Grev., var. patens, J. 

 Ag. 



P. elongata, Grev. 



P. fastigiata, Grev. 



P. nigrescens, Grev. 



P. fruticulosa, Spreng. 



Pterosiphonia parasitica, Schm. 



Brongniartella byssoides, Bory. 



Heterosiphonia plumosa, Batt. 



Spermothamnion Turneri, Aresch. 

 *S. irregulare, Ardiss. 

 *Trailliella intricata, Batt. 



Griffithsia flosculosa, Batt. 



Monospora pedicellata, Sol. 



Rhodochorton membranaceum Magn 



Rh. Rothii, Nag. 



Rh. floridulum, Nag. 



Callithamnion byssoides, Arn. 



C. polyspermum, Ag. 



C. Hookeri, Ag. 



C. tetragonum, Ag. var. /3 brachia- 

 tum, J. Ag. 



Plumaria elegans, Schm. 



Ptilota plumosa, Ag. 



Antithamnion Plumula, Thur. 



Ceramium diaphanum, Roth. 



C. circinnatum, J. Ag. 



C. rubrum, Ag. 



C. flabelligerum, J. Ag. 



C. acanthonotum, Carm. 

 Dumontia incrassata, Lam. 

 Furcellaria fastigiata, Lam. 

 Polyides rotundus, Grev. 

 Cruoriella Dubyi, Schm. 

 Hildenbrandtia prototypus, Nardo. 

 Schmitziella endophlcea, Born, et 



Batt. 

 Melobesia farinosa, Lam. 

 M. corallinae, Solms. 

 Dermatolithon macrocarpum, Fosl., 

 f. Laminariae, Fosl. 



D. hapalidioides, Fosl. 

 Lithophyllum incrustans, Fosl. 

 Lithothamnion lichenoides, Fosl. 

 L. Lenormandi, Fosl. 



L. corticiforme, Fosl. 

 Phymatolithon polymorphum, Fosl. 

 Corallina officinalis, L. 



Genera of Doubtful Affinity. 

 ♦Rhododermis elegans, Crn. *Rhodophysema Georgii, Batt. 



LICHENS. 



BY DAVID M'ARDkE;. 



Only a very little time was available for the collection of 

 the Lichens of Lambay, and the following list represents but 

 a small portion of the Lichen flora. I believe that an adequate 

 examination of the island with regard to these plants would 

 result in a list which would compare favourably with that of 

 similar areas elsewhere. 



Cladonia pyx i data, L.— On peaty banks, Nov., 1906. 

 C. gracilis, L. — Near the well on the east side, among rocky heaths, 

 rare. 



