SYXALISSA.] COLLEMEI. 37 



lular. Apothecia terminal, innate, lecanorino-endocarpoid, conco- 

 lorous; spores ellipsoid or ovoid, 

 usually 8nae, occasionally nu- 

 merous, simple, colourless ; hy- 

 menial gelatine variously tinged 

 wit h iodine. Spermogones ter- 

 minal or subterminal, with 

 simplish sterigmata and oblong 

 spermatia. 



Distinguished from Ompha- 

 laria, which does not occur in our 

 islands, chiefly by the goniinic 

 granules ; these are in pairs 

 between the thalline filaments or 

 affixed to their branchlets. Only 

 two species occur with us, rarely, 

 and generally in poor condition. 



1. S. symphorea Nyl. Syn. 

 i. (1858) p. 94, t. 3. f. 2. 

 Thallus fruticulose, fastigiately 

 divided, opaque,black; branches 

 short, rounded, erect, obtuse at 

 the apices, sometimes only no- 

 dulose. Apothecia minute, 

 punctiformi - impressed, at Fig. 8. 



length dilated, subconcolorous, Synnlissa symphorea Nyl. a. Section of 

 the thalline margin tumid; thallus with an apothecium, x 

 spores 8-24nse, ellipsoid or 

 spherical, 0,009-11 mm. long, 

 0,000-7 mm. thick ; hymenial 

 gelatine not tinged with iodine. 

 Mudd, Man. p. 35, t. 1. 

 f. 2 : Cromb. Lich. Brit. p. 3 ; 

 Leight. Lich. Fl. p. 16, ed. 3, p. 13. Synalissa vulga"-is Thwaites, 

 Ann. Mag. Js T at. Hist. 1 849, iii. p. 219. Cottema symphureum DC. Fl. 

 Fr. ii. (1805) p. 382. C. synalissa Ach., Tayl. in Mack. Fl. Hib. ii. 

 p. 108. 



The thallus in our specimens is generally only noduliform. Elsewhere 

 it often occurs amongst the squamules of Lecidea lurida, and further 

 research may discover it in Britain also similarly associated. A reference 

 to fig. 8 will show the peculiar arrangement of the gonimia affixed to 

 the branchlets of the filaments. The apothecia are very rare in Great 

 Britain, and the spermogones are only seldom seen, with spermatia 

 0,003 mm. long, 0,001 mm. thick. 



Hnb. On calcareous rocks in maritime and upland districts. Distr. 

 Local and rare, having with certainty been gathered only very sparingly 

 in S.W. England, and'in the S.W. Highlands, Scotland; 'the Irish plant 

 being very doubtful. B. M. : Portland Island, Dorsetshire ; Anstey's 

 Cove, Torquay, Devonshire ; St. Vincent's rocks, Gloucestershire. Bar- 

 caldine, Argyleshire. 



b. Section of a spermogone, X 30. 

 <?. Syngonimia between the filaments, 

 X 350. d. Gonimia affixed to a race- 

 mosely divided filament, X 350. e. Spo- 

 riferous tbeca with three paraphyses, 

 X 350. /. Four spores, x 500. g. 

 Sterigmata and spermatia, X 500. 



