296 PYRENOCARPEI [VERRUCARIA 



47. V. elachistophora Nyl. in Flora Ixi. p. 246 (1878).— 

 Thallus white, ime([ual, cracked (perhaps not proper). Perithecia 

 (parasitic ?) black, partly emergent, slightly depressed above ; 

 perithecial wall black, entire ; spores 8 in the ascus oblong- 

 ellipsoid, colourless, simple (or sometimes spuriously 1 -septate), 

 0,007-8 mm. long, 0,0035 mm. thick ; paraphysos moderate ; 

 by menial gelatine not tinged with iodine. — Cromb. in Grevillea 

 vii. p. 98 ; Leight. Lich. Fl. ed. 3, p. 454. Specimen not seen. 



The presence of paraphysos would exclude this species from the 

 genus, but it requires further investigation. 



Hah. On quartzose rocks. — B. M. Kylemore, Connemara, Galway 

 (the only locality). 



48. V. conturmatula Nyl. in Flora Ixii. p. 222 (1879).— 

 Thallus indicated by greyish spots. Perithecia small, black, 

 depressed, subconfluent ; perithecial wall dimidiate ; spores 8 in 

 the ascus, ellipsoid or ovoid-ellipsoid (sometimes obsoletely 

 1-septate), 0,011-14 mm. long, 0,005-6 mm. thick; hymenial 

 gelatine wine-red with iodine. — Cromb. in Grevillea vii. p. 29. 



Nj^lander considers that the species is possibly parasitic. The 

 specimen in the herbarium of the British Maseum is too small and 

 scanty for examination. Larbalestier states that only two small 

 specimens were met with. 



Hah. On quartzose rocks in a stream associated with Lecanora 

 lacustris. — B. M. Near Glencorbet, Connemara, Galway. 



V. niveoatra Borr. in Engl. Bot. Suppl. t. 2637, fig. 1 (1830), 

 and V. mollis Tayl. in Mackay Fl. Hib. ii. p. 97 (1836) recorded 

 respectively as Pyrenothea niveoatra Leight. Angioc. Lich. p. 67, 

 t. 29, fig. 1, and P. mollis Leight. /. c. t. 29, fig. 2, are the 

 spermogonial condition of other lichens. F. niveoatra has been 

 determined by Nylander (Lich. Env. Paris, p. 108 (1896), as 

 the spermogonial state of OpegrapJia cinerea, a species not other- 

 wise recorded in the British Isles. It has arcuate spermatia 

 measuring 0,012-16 mm. long, 0,001 mm. thick, and in this 

 respect alone differs from 0. vulgata, in which the spermatia are 

 0,014-16 mm. long, 0,0005 mm. thick (fide Nyl. I. c.) ; the two 

 species may therefore be considered as identical. A specimen of 

 V. mollis from Carig Mt., Kerry, has been determined by 

 Nylander as the spermogonial state of Opegrapha sp. 



V. lithina Tayl. in Mackay Fl. Hib. ii. p. 92 (1836) 

 (non Ach.) on rocks from Derriquin, Kerry, has been deter- 

 mined as Pyrenothea lithina Leight. Angioc. Lich. p. 68, t. 29, 

 fig. 3. P. lutea Leight I. c. t. 29, fig. 4, collected on trees at 

 Gopsal, Leicestershire, and P. sulphur ea Leight. torn. cit. p. 69, 

 t. 29, fig. 5, on sandstone rocks. Niton, I. of Wight, are also, 

 judging from the descriptions and figures, spermogonial states of 

 lichens not determined. 



