384 CYCLOCARPINEX [ DIPLOSCHISTES 
north, Shropshire; Matlock, Derbyshire; Langbaurgh, Cleveland, 
Yorkshire; Egglestone, Durham; Lismore and Appin, Argyll; Glen 
Lochay, Ben Lawers, Craig Tulloch and Blaeberry Hill, Perthshire ; 
Morrone, Braemar, Aberdeenshire; near Kileully, Cork; Killarney, 
Kerry ; Glen Inagh, Connemara, Galway; Deer Park, Belfast, Antrim. 
3. D. gypsaceus Zahlbr. in Hedwigia xxxi. p. 35 (1892).— 
Thallus thick, soft, continuous or cracked, unequally wrinkled, 
more or less pulverulent (K —, CaCl + red). Apothecia immersed 
in the thallus, the dise blackish, white-pruinose, small and enclosed 
or widening to about 2 mm. across, the thalline margin scarcely 
perceptible or turgid ; hymenium dark-brown; paraphyses slender, 
intricate, budding offsmall cells at the tips ; spores oblong-ellipsoid 
up to 8-septate, irregularly muriform, 23-42 p, long, 9-17 p thick; 
hymenial gelatine faintly bluish then yellowish with iodine.-— 
Urceolaria scruposa var. albissima Ach. Meth. Lich. p. 147 (1803) ; 
f. gypsacea Leight. Lich. Fl. p. 234; ed. 3, p. 239. U. gypsacea 
Ach. Lich. Univ. p. 338 (1810) ; Cromb. in Grevillea xix. p. 60 
(1891) & Monogr. i. p. 518. 
Differs from D. seruposa in the whiter softer pulverulent thallus 
and in the spore characters. As to the latter, all measurements taken 
_ agree with the above sizes given by Harmand, though Crombie has 
stated them to be up to 57 » long and 16-24 » thick. Crombie also 
points out as a specific character that the medulla of the thallus does 
not turn blue with iodine. 
Hab. On calcareous and cretaceous rocks in maritime and upland 
districts. Distr. Recorded from few localities in S. and Central 
England, 8. Wales and W. Ireland; probably overlooked.—B. M. 
The Downs, Lewes, Sussex; Bathampton Downs, Somerset; N. Derby- 
shire; Aberdw Rocks, Brecknockshire ; Glencorbot, Connemara, 
Galway. 
4. D. actinostomus Zahlbr. in Hedwigia xxxi. p. 34 (1892). 
—Thallus subdeterminate, thickish, rather Uniform and smooth, 
cracked-areolate, the areole more or less convex, light-grey (K —, 
CaCl + red, IF }),.). Apothecia minute, one or several immersed 
in an areola, the disc punctiform, enclosed, then opening and 
somewhat plane, blackish, whitish-grey-pruinose, the proper 
margin finely striate, the thalline margin thickish, not prominent; 
hypothecium narrow, brown; parapliyses slender, intricate ; spores 
rather broadly ovoid or ellipsoid, 5—6-septate and muriform, up 
to 35 w long, 16-20 » thick ; hymenial gelatine slightly tinged, 
blue then yellow with iodine.—Urceolaria actinostoma Pers. ex 
Ach. Lich. Univ. p. 288 (1810); Cromb. in Journ. Bot. xxiii. 
p. 196 (1885) & Monogr. i. p. 518. 
The species is not represented in our Islands, but only the following 
variety. The fruits in their enclosed stage are not unlike a Verrucaria, 
and it was so named by Acharius (1. c.). The striate character of the 
inner proper margin is mostly obscured by the overlying thalline 
margin; it is evidently due to tufts of dark-brown hyphe which are 
more or less apart, thus appearing as dark streaks. 
