enterographaJ chiodectonace^ 259 



Cromb. Lich. Brit. p. 101 ; Leight. Lich. Fl. p. 389 ; ed. 3, 

 p. 412. Porina aggregata Ach. Syn. p. 112 (1814) fide Fries. 

 Sagedia aggregata Fr. Lich. Eur. p. 416 (1831); Leight. Angioc. 

 Lich. p. 24, t. 8, f. 1. Pertusaria crassa Hook, in Sm. Engl. 

 Fl. V. p. 160 (1833). Verrucaria ohscura Tayl. in Mackay Fl. 

 Hib. ii. p. 96 (1836). 



Exsicc. Leight. nos. 69, 96 (as Sagedia aggregata var. venosa): 

 Mudd n. 224 ; Larb. Lich. Hb. nos. 115, 276 & Lich. C^sar. n. 45'. 



Hab. On trunks of somewhat old trees in wooded regions. — Distr. 

 Fairly common in the Channel Islands and throughout England, 

 more especially in the southern counties, and in S. and W. Ireland, 

 rare in S. and W. Scotland. — B. M. Guernsey ; Ann Port, Jersey ; 

 Shanklin and near Ryde, I. of Wight ; Whitesand Bay and 

 Withiel, Cornwall ; Plymouth, and near Totnes, Devon ; New 

 Forest and Lymington, Hants ; St. Leonard's Forest, Cla.yton, Wool- 

 sonbury, Arundel, and Fairlight, Hastings, Sussex ; Coldharbour, 

 Surrey ; Wrotham, Kent ; Epping Forest, Gosfield Hall, Hockley 

 Woods, and Rayleigh, Essex ; Cirencester, Gloucestershire ; Great 

 Glenham, Suffolk ; near Norton and near Malvern, Worcestershire ; 

 near Shrewsbury, Shropshire ; Gloddaeth, near Conway and Llan- 

 bedrog, Carnarvonshire ; Gopsall and Twycross, Leicestershire ; near 

 Nottingham ; Westerdale, Cleveland, Yorkshire ; Barcaldine, Argyll ; 

 Castle Bernard Park, Bandon, Castlemary, and near Queenstown, 

 Cork ; Killarney, Kerry ; Glenstale, Tipperary ; Dromoland, Clare ; 

 Glen Inagh and Derryclare, Connemara, Galway. 



Form saxicola Cromb. in Herb. — Differs in the somewhat 

 thicker and more distinctly areolate thallus, the hypothallus is 

 also less marked. 



Exsicc. Larb. Lich. Hb. n. 115 & Lich. Caesar, n. 46. 



Hab. On rocks. — Distr. Rather rare in the Channel Islands, 

 S. England and W. Ireland. — B. M. Port Gorey, Sark ; Noirmont and 

 La Coupe, Jersey ; Whitesand Bay, Cornwall ; near Plymouth, 

 Devon ; Derryclare, Connemara. 



2. E. HutchinsiSB Koerb. Parerg. Lich. p. 259 (1861).— 

 Thallus crustaceous, rather thin, dull-pale-yellow or brownish, 

 minutely cracked into areolae, limited by the black hypothallus ; 

 the verrucse small, scattered, flat. Apothecia variable in form, 

 minute, oblong and sometimes round, straight or curved, some- 

 times branched, plane, immarginate but with a lateral wall 

 which traverses the base as a thin black line ; spores fusiform 

 elongate, 5-7- or pluri-septate, 0,025-30 mm. long, 0,004 mm. 

 thick. — Platygramma Hutchinsise Leight. in Ann. Mag. Nat. Hist. 

 ser. 2, xiii. p. 393, t. 7, f. 28 (1854). Stigmatidiurft Hutchinsise 

 Nyl. in Mem. Soc. Sci. Nat. Cherb. v. p. 132 (1857); Mudd 

 Man. p. 243 ; Cromb. Lich. Brit. p. 101 ; Leight. Lich. Fl. 

 p. 390; ed. 3, p. 413. 



Exsicc. Leight. n. 130; Mudd nos. 225, 226 (corticolous) ; 

 Larb. Lich. Hb. n. 116. 



Distinguished by the thinner more continuous thallus and by the 

 scattered minute fertile verrucae. 



s 2 



