APPENDIX. 405 



Trichocolea tomcntella, Nees. Wood between Highgate and Hcmsey ; 

 Budd. MSS. 



PTiLiDniM ci/iare, Nees. By vr&tev running through Old-Fall "Wood, be- 

 tween Highgate and Muswell Hill, Mr. Dandridge ; R. Si/n. iii. 111. 



Maetinkllia complanata. Gray. (Radula, Diim.) Pinner Wood ; Hind. 



Frtjilania dilatata, Nees. Harrow ; Hind. 



? F. Tamarisci, Nees. Hampstead ; Burnett 105. 



FossOMBRONiA pite-iWa, Nees. Bishop's Wood, Martyn ; B. 6^.413. 



Pellia cali/cina, Nees. Harrow ; Hind. 



P.ej)rphyna,l^ii&s. Hampstead ; i?z«we^!; 105. Harrow Weald Common ; 



Hind. 

 Blasia^?«2//«, L. On Hounslow Heath ; ^«f7s. ii. 519. 

 EiccAKDiA multijida, Gray. (Aneura, Bum.) Cane Wood, Doody ; Huds. 



i. 437. 

 Mbtzgeria fiircata, Nees. In a deep dry ditch between ' Mother Huflf 's' and 



Cane Wood, Hampstead ; Budd. MSS. 



Akthoceros functatus, L. On Hounslow Heath; Huds. i. 519. About 

 London; E. B. 1537. 



MAECHAVTIACEM. 

 'KiMCBJJUTiA. polymorpha, L. Hampstead Heath. Bishop's Wood. 



EICCIACEM. 



Eiccia fluitans, L. Pinner ; Harrow ; Hind. Pond in the meadows be- 

 tween Bishop's Wood and Fiuchley, 1866, abundant; Baoies. Pond 

 on Hadley Common ! ; Warren. 



III. CHAEACE^. 



Chara flc-xilis, L. Ponds at Hendon ; Quckett. Near Hornsey ; Huds. i. 



399. 

 C. syucarpa, Thuill. Euislip Eeservoir, 1861 ; Hind. 

 C. trans/wens, Fers. Stanmore Heath, 1827-30 ; Varenne. 

 C. vulgaris, L. AVoodridiugs, Pinner!; Eoxeth; Apperton ; Hind. Isle 



of Dogs ; ponds at Netting Hill; Quekitt. Kilburn ! ; Warren. 

 C. hispida, L. Finchley Common, not unfrequent, J. AVoods ; B. G. 399. 

 C. fragilis, Desv. Pinner Hill ; Eastcott ; Euislip Eeservoir ; Hind. 



IV. LICHENES. 



BY REV. JAMES M. CROMBIE, M.A., F.L.S. 



The county of Middlesex is by no means rich in Lichens. In fact, it is 

 the very poorest of any county in Great Britain. Tlie dense and smoky 

 atmosphere surrounding the metropolis is very unfavourable to the gi-owth 

 of this order of cryptogams. Hence it is that, the old trees in the parks, 

 which might be expected to yield a fair number of species, present but very 

 scanty traces indeed of any lichen vegetation. Nor even in the remoter 



