NOBMANDINA] DBRMATOCARrACB^ 273 



mandina Jungermannise Nyl. in Act. Soc. Linn. Bord. ser. 3, i. 

 p. 419 (1856) ; Mudd Man. p. 268. 



Exsicc. Leight. n. 367 ; Cromb. n. 197 ; Larb. Lich. Hb. 157 

 & Lich. Csesar. n. 93. 



nah. On mossy trees. — -Distr. Not common, but oooumng in all 

 parts of the British Isles. — B. M. St. Peter's Valley, Eozel, Jersey ; 

 Guernsey ; near Launceston, and Withiel, near Bodmin, Cornwall ; 

 Plymouth, near Lidford, UUacombe near Bovey Traoey, and near 

 Ilfraoombe, Devon ; near Eyde, I. of "Wight ; New Forest, Hants ; 

 St. Leonard's Forest, Poynings Common, Saddlesoomb, Arundel Parle, 

 Glynde, Ardingly, Wistou, CrowbOrough and Beeding Priory, Sussex ; 

 Dolgelly and Barmouth, Merioneth ; Keswick, Cumberland ; The 

 Trossachs, Glen Loohay, Glen Falloch and Finlarig, Killin, Perth- 

 shire ; Barcaldine, Argyll ; Glen Nevis, Invernessshire ; Derriquin, 

 Killarney, Kerry ; Letterfraok, Connemara, Galway. 



103. DACAMPIA Massal. Sulla Lecidea Hooheri di Schserer, 

 Verona, 1853, p. 7. (PI. 39.) 



Thallus squamulose, spreading, with a black subiculum. Algal 

 cells Plezirocoocus. Perithecia entire, carbonaceous ; paraphyses 

 persistent, branched ; asci elongate ; spores ellipsoid-fusiform, 

 variously septate and muriform, brown. 



A somewhat doubtful monotypio genus ; the perithecia have been 

 regarded by A. Zahlbruokner (Pflanzenf. i. 1*, p. 78 (1908) ) and other 

 liohenologists as a fungus parasitic on a lichen-thallus. 



1. D. Hookeri Massal. I. c. t. 1, fig. 4. — Thallus squamulose, 

 whitish, thick, somewhat lobate at the circumference, appressed 

 and farinose, not corticated. Perithecia rising from the lower dark 

 stratum, obpyriform with a somewhat wide ostiole ; peritheoial 

 wall dark-brown, rather thick, entire ; paraphyses stoutish, 

 branched and entangled, conglutinate or free ; asci elongate ; 

 spores 8 in the ascus, ellipsoid, fusiform, 3-5-septate, rarely only 

 2-celled, consti-icted in the middle, becoming muriform, dark- 

 brown, the end cells small, lighter in colour, 0,020-35 mm. long, 

 0,010-12 mm. thick. — Verntcaria Hooheri Borr. in Engl. Bot. 

 Suppl. t. 2622, fig. 2 (1830) ; Hook, in Sm. Engl. El. v. p. 155; 

 Leight. Angioc. Lich. pp. 64, 77, t. 27, fig. 5:' Lecidea Hookeri 

 Schser. Enum. p. 102 (1850) ; Oromb. Lich. Brit. p. 88 ; Leight. 

 Lich. Fl. p. 309 ; ed. 3, p. 322. 



Exsicc. Leight. n. 318. 



Considerable confusion of views has arisen as to the structure 

 and systematic position of Borrer's plant, the perithecia having 

 more recently been described as fungi parasitic on the thallus of 

 Lecidea Hookeri, the latter having 2-celled brown spores. There 

 is no record of L. Hooheri in Britain other than the specimens bear- 

 ing the perithecia of Dacampia, and in that respect the continental 

 specimens examined agree with the British. The. 2-celled brown 

 spores are occasionally present along with the more developed 

 muriform ones. The thallus becomes dark-brown in the lower parts, 

 II. T 



