BRITISH LICHENS

322 PYRENOCARPElE VERRUCARIA
(parasitic 1) black, partly emergent" slightly depressed above;
perithecial wall black, entire; spores 8 in the ascus, oblongellipsoid,
colourless, simple (or sometimes spuriously I-septate),
7-8 fl.long, 3·5 f.I. thick; paraphyses moderate; hymenial gelatine
not tinged with iodine.-Cromb. in Grevillea vii. 98; Leight.
Lich. Fl. ed. 3, 454. Specimen not seen.
ThE' presence of paraphyses would exclude this speciea from the
genus, but it requires further investigation.
Hab. On quartzose rocks. Kylemore, Connemara, Galway, the
only locality.
50. V. conturmatula Nyl. in Flora lxii. 222 (I879).-Thallus
indicated by greyish spots. Perithecia small, black, depressed,
subconfluent; perithecial wall dimidiate; spores 8 in the ascus,
ellipsoid or ovoid-ellipsoid (sometimes obsoletely I-septate),
11-14 fl. long, 5-6 fl. thick; hymenial gelatine wine-red with
icf.line.-Cromb. in Grevillea viii. 29 (1879). -
Nylander considers that the species is possibly parasitic. The
specimen in the herbarium of the British Museum is too small and
scanty for examination. Larbalestier states that only two small
specimens were met with.
Hab. On quartzose rocks in a stream associated with Lecanora
laclistris.-B. M. Near Glencorbet, Connemara, Galway.
I mperfect Species.
V. niveoatra Borr. in Eng!. Bot. Supp!. t. 2637, fig. 1 (1830);
Hook. in Sm. Eng!. Fl. v. 151. and V. mollis Tay!. in Mackay Fl.
Hib. ii. 97 (1836) recorded respectively as Pyrenothea niveoatra
Leight. Angioc. Lich. 67, t. 29, fig. 1, and P. mollis Leight. l. c.
t. 29, fig. 2, are the spermogonial condition of other lichens.
V. niveoatra has been determined by Nylander (Lich. Env. Paris,
108 (1896)), as the spermogonial state of Opegrapha cinerea, a
species not otherwise recorded in the British Isles. It has arcuate
spermatia measuring 12-16 fl. long, 1 !J. thick, and in this respect
alone differs from p. vulgata, in which the spermatia are 14-16 fl.
long, '5 fl.. thick (fide Ny!. l. c.); the two species are probably
identical. A specimen of V. mollis from Craig Mt., Kerry, has
been determined by Nylander as the spermogonial state of
an Opographa.
V. Iithina Tay!. in Mackay Fl. Rib. ii. 92 (1836) (non Ach.) on
rocks from Dernquin, Kerry, has been determined as Pyrenathea
lithina Leight. Angioc. Lich. 68, t. 29, fig. 3. P. lulea Leight.
1. c. t. 29, fig. 4, collected on trees at Gopsal, Leicestershire, and
P. sulplturea Leight. tom. cit. 69, t. 29, fig. 5, on sandstone rocks,
Niton, I. of Wight, are also, judging from the descriptions and
figures, spermogonial states of hchens not determined. :For other
" Verrucariw" see" Microfungi recorded as British Lichens."