NEW BARE OR CRITICAL LICHENS 315 



Verrucaria onwcosa Wa"hl, Quantoxhead (5). 



V. aquatilis Mudd. On stones in upland streams, near Crow- 

 combe (5), Shi^Dham (6). 



V. hydrela Ach. Exraoor (5). 



V. Icdvata Ach. Near Taunton (5). 



V. margacea Wahl. Treborough (.5). 



V. (Bthiohola Wahl. Malsmead (4), Exmoor, Aisholt, and Tre- 

 borough (5), Y Garn, 2500 ft. (49). 



V. submersa Schaer. Not uncommon in the Quantock Combes 

 (5), Llanberis (49). 



V. coerulea DC. Near Taunton (5), Cheddar and Ebbor Gorge 

 (6). 



V. glaucina Ach. usually occurs on calcareous rocks but it may 

 extend on enclosed flints. Winsham (5). 



V. fuscella (Turn.) Ach. On top of calcareous wall near Taun- 

 ton (5). 



V. maculiformis Kremp. is not uncommon on slaty rocks, Exmoor, 

 Quantocks and near Washford (5), Dinorwic (49). 



V. rupestris var. suhalbiccms (Leight.) Mudd. On mortar, 

 Staplegrove (5). 



V. Integra (Nyl.) Carroll. On calcareous walls near Taunton (5 

 teste A. L. Sm.), Bruton (6). A form found on earth derived from 

 the decomposition of calcareous rock has a somewhat greenish thallus 

 and the perithecial pits are deeper. This may be distinguished as 

 form terrestris. Merridge near Bridgwater and Stoke St. Marv (5). 

 V. calciseda DC. Orchard Portman (5), Mendip (6). 

 Thelidium immersum (Leight.) Mudd. Babbacombe (3), Brean 

 Down (6), Bwlch Gwyn (50), Castleton (57). 



JPolyhlastia inter cedens Loenn. On limestone wall, Buckden (64). 



P. inumhrata (Nyl.) A. L. Sm. Llanberis (49), Creag-an- 

 Lochan (88). 



P. theleodes (Somm.) Th. Fr. Buckden (64), Creag-an-Lochan 

 (88). 



P. tristicula (Nyl.) Th. Fr. On mosses of wall, 100ft., Taunton. 

 The only previous British record was by Adm. Jones in 1864. 



Staurothele ebborensis, sp. nov. Thallus crustaceus, albido- 

 cinerascens, gonidiis viridibus (Protococcus). Perithecia parva, nigra, 

 minute papillosa, innata vel leviter emerso-convexa, integra ; ostiolo 

 depresso ; hymenii gonidiis subspheroidiis viridibus ; ascis clavatis 

 uni- vel bi-sporis ; paraphysibus hyalinis evanescentibus ; osteoli fila- 

 mentis multis ; gelatina hymenia coerulea iodo ; sporis oblongis, hj^a- 

 linis vel leviter brunneis, primum unitriseptatis demum inordinate 

 mui-aliformibus, 0*028-45 mm. longis, 0"014-19 mm. latis. 



Thallus crustaceous, greyish-white, algal cells (Protococcus) green. 

 Perithecia small, dark, minutely pg^pillate, innate or slightly convex 

 and emergent, entire ; ostiole depressed ; hymenium with green sul - 

 spheroidal algal cells ; asci clavate 1- or 2-spored ; paraphyses hyaline, 

 disappearing ; osteolar filaments many ; hymenial gelatine blue with 

 iodine ; spores oblong, hyaline or slightly brown, at first 1-3-septate, 

 then irregularly muriform, 28-45 X 14-19^. On Carboniferous lime- 



z2 



