288 



NATURAL HISTORY SOCIETY OF DUBLIN. 



No. 394. 



No. 359 Verrucaria 



Verrucaria papillosa (Ach.). Tayl. 



This, though worn, is certainly same as 

 the plant described by Leighton.* Ny- 

 landerf considers that plant V. ethiobola 

 (Ach.). I imagine there is some error 

 here, for the Verrucaria on this speci- 

 men has a thick-, white, tartareous thal- 

 lus; the apothecia are innate at the 

 base ; unfortunately, the thallus is very 

 much worn, and is not seen except 

 where it still remains about the apo- 

 thecium. The plant is not entered in 

 "Flora Hibernica," though labelled by 

 Taylor. 

 This Verrucaria (parasitic on No. 359) be- 

 longs to Ny lander's division, " paraphy- 

 ses, none;" it nourishes on TJrceolaria 

 (Lecanora) cinerea on stones in Lough 

 Bray, under water, except in extreme 

 dry summers. The apothecia are black, 

 prominent, having distinct pore ; spores 

 fuliginous; -0006" by -0003"; 8 in very 

 tender asci ; iodine has no effect, merely 

 occasioning a slight yellow. Nylander 

 considers this fungoid. 



As on the previous occasion, for the use of those consulting the Col- 

 lection, a List of the Lichens therein is appended in the order in which 

 the specimens occur, as added from time to time. The accompanying 

 number is that borne by each specimen, and an asterisk is added to 

 those species which do not occur in Mackay's "Mora Hibernica." 



LIST OF LICHENS ADDED TO THE COLLECTION. 



350. Cladonia rangiferina (L.) 

 *351 . Lecidea tenebrosa (Flot.) 



352. Lecidea sanguinaria (Z.). 



353. Lecidea petraea, form. 



354. Verrucaria nigrescens 



{Pers.), form. 



355. Lecidea uliginosa (Schr.), 



form. 



356. Verrucaria nigrescens 



(Pers.), form. 

 357- Lecidea decolorans (Flic.) 



1 Ang. Lich.," p. 54. 



358. Cladonia cervicornis (Ach.) 



359. TJrceolaria (Lecanora) cine- 



rea (£.), and a parasitic 

 Verrucaria. 



360. Cornicularia aculeata (Fr.) 



(now Cetraria by Nylan- 

 der). 



361. Gyrophora erosa (Roffm.) 

 *362. Psora (Lecidea) atro-rufa 



(Dicks.) 

 363. Usnea barbata (Fr.) 



f "Expo. Synops. Pyren.," p. 25. 



