BUELLIa] LECIDEACEiE 175 



thecia black, concave then plane, with a thickish margin ; hypo- 

 thecium reddish-brown ; paraphyses slender, lax, faintly septate, 

 brown at the capitate tips ; spores always 8 in the ascus, ellipsoid 

 or ovoid, straight or curved, 0,010-15 mm. long, 0,006-9 mm. 

 thick. — Lecidca leptocUnoides Nyl. in Bull, Soc. Linn. Norm. scr. 

 2, vi. p. 311 (1872). Specimen not seen. 



Hah. On rocks. — Distr. Eare in the Channel Islands (Jersey, col- 

 lected by Larbalestier, yitZe Steiner). 



22. B. stellulata Mudd Man. p. 216.— Thallus suborbicular, 

 thin, minutely cracked-areolate, the areolae plane, smooth, white 

 or greyish-white (K -f yellow, CaCl — , medulla I — ) ; hypothallus 

 thin, black. Apothecia minute, subinnate, crowded, plane, black, 

 margined, the margin thin, entire ; hypothecium brownish-black ; 

 paraphyses coherent, brownish-black at the apices ; spores ellipsoid, 

 0,009-12 mm. long, 0,001-5 mm. thick; hymenial gelatine bluish 

 with \o(\\\\Q.—Ijecidea stellulata Tayl. in Mackay Fl. Hib. ii. p. 

 118 (1836); Carroll in Nat. Hist. Rev. 1859, p. 528; Cromb. 

 Lich. Brit. p. 86 ; Leight. Lich. Fl. p. 304 ; ed. 3, p. 316. 



Exsicc. Leight. n. 276 ; Larb. Csesar. n. 38 k, Lich. Hb. n. 311. 



In a less developed condition the thallus, as noticed by Taylor, 

 occurs in small patches usually less than an inch in diameter ; but 

 these afterwards become confluent, the thallus eventually attaining a 

 diameter of 4 inches or more. The areolae, aggregate in the perfect 

 plant, are at times somewhat scattered (form dispersa Leight. Lich. 

 Fl. ed. 3, p. 316). The numerous apothecia are crowded, and here 

 and there confluent (form conjiucns Leight. I. c), when the margin is 

 obliterated. 



Hah. On rocks and stones in maritime, rarely in mountainous 

 districts. — Distr. Not unfrequent in the Channel Islands, S. and W. 

 England, S. and N.E. Ireland ; very rare in the S.W. Highlands of 

 Scotland. — B. M. Portelet Bay and La Moye, Jersey ; Cobo Bay, 

 Guernsey ; Bark ; Alderney ; Lydd Beach, Kent ; Hastings, Aldrington 

 Beach and near Brigliton, Sussex ; Shanklin, I. of Wight ; Whitesand 

 Bay, St. Merryn and Kynezal Clili', near Penzance, Cornwall ; Tor- 

 quay, Devon ; Fort Hill, Fishguard, Pembrokeshire ; Dolgelly and 

 Barmouth, Merioneth ; Gimlet Rock, Pwllheli and Borth, Cardigan- 

 shire ; Capel Curig, Carnarvonshire ; Barcaldine, Argyll ; near 

 Ardglass, Down ; Kinsale, Cork ; Killarney, Kerry ; Carrigogunnel, 

 Limerick. 



23. B. impressula A. L. Sm. — Thallus whitish-grey, thin, 

 filmy, areolate (K + yellow then red), limited by the black hyjw- 

 thallus. Apothecia black, minute, numerous and crowded into 

 small groups of three or more, impressed in the thallus, each 

 apothecium circumcissed so as to appear surrounded by a thin 

 thalline margin ; hypothecium thin, blackish-brown ; paraphyses 

 indistinct, the hymenium tinged with brown ; spores roundish- 

 oblong, more or less constricted in the middle, brown, 0,014-15 

 mm. long, 0,009 mm. thick ; hymenial gelatine dull-blue with 

 iodine. — Lecidea impressula Leight. in Trans. Linn. Soc. ser. 2, 



