Rev. W. A. Leighton on the Bintisk Graphideae. 4i3 



in the centre, smoothish, dull. Sporidia in asci, eight, of a very 

 peculiar form, slenderly clavseform, round at the extremities, 

 3-septate, pale yellow. 



Plate VIII. fig. 39. a. Vertical section of thaUus and ardella; b, sporidia ; 

 c, thallus and ardellae, nat. size. 



9. Coniocarpon, DC. 



Apothecium (ardella) appressed, rotundato-deformed or elon- 

 gate, sessile, covered with a subcartilaginous membrane which 

 ultimately breaks up into a tine powder, within subgelatinous, 

 containing a series of pyriform asci ; perithecium none j disk 

 plane, depressed, not bordered, pruinose. Thallus crustaceous. 



Name from /covi?, dust, and Kapiro^, fruit. 



This genus has in reality precisely the same structure as that 

 of Arthonia, but it is retained separate on account of the peculiar 

 property of the upper surface of the ardellae breaking up into 

 powder, which I have never obsen^ed to happen in any of the 

 species of Arthonia. 



Mr. Borrer [in litt. 1852) remarks, "The surface of the apo- 

 thecium in Lecanactis hjncea and in Arthonia impolita sometimes 

 becomes powdery. I suspect that both in that state have passed 

 for Coniocarpon nigrum, DC, Spiloma variolosum, Ach., S. nigrum, 

 Lich. Brit." &c. 



1. Coniocarpon cinnaharinum, DC. Thallus filmy, thin, gray- 

 ish, determinate ; ardellse sessile, clustered, shapeless, solid ; disk 

 plane, depressed, lurid and pruinose, or powdery and of a bright 

 vermilion ; sporidia in asci, eight, obovato-clavate, rounded at 

 the extremities, 4-septate, the upper cell largest, pale red, 



" Spheeria gregaria, TTeigel, Obs. Bot. 43. t. 2. f. 10." (17/2); Dicks. 



Cnpt. 1. 22; "With. Fl. Brit. 4. 391 : "Sowerb. Fung. t. 3/5. f.5." 

 Lichen'impolitus, Sm. E. Bot. t. 981 (1802). 

 " Coniocarpon cinnabarinum. DC. Fl. Fran^, 2nd ed. 323; " Fee, Crvpt. 



tab. 1. f. 10 (1824); Fries ! L. Reform. 379; Summa V. Scand. 118. 

 Spiloma tumidulum, Ach. Meth. 11. t. 1. f. 5 (1803) ; Sm. E. Bot. t. 2151 ; 



Jobnst. ! Ben\-. 101 ; Moug. & Nestl. Stirpes, 651 ! 

 tumidulum ». Sf ^, L. Univ. 136 (1810) ; Svn. 1 ; Hook. Fl. Scot. 2. 



35; Grev. Fl. Edin. 324. 

 Arthonia tumidula, Ach. in Schrad. X. Joium. Bot. 1. 3. p. 1 1 (1806). 

 Spiloma gregarium. Turn. & Borr. Lich. Brit. 42(1813); Hook. Br. Fl. 2. 



167 ; Tayl. Fl. Ilib. pt. 2. 77. 

 Conioloma coccineum, Mart. Erlang. 284 (181/). 

 Coniocarpon gregarium, Schser. Spicil. 223 (1823-1836); Enum. 242. t. 9. 



f.5; Exsic. 239! 

 Arthonia cinnabarina, Walh*. Cnpt. Germ. 320 (1831). 



" Thallus forming roundish patches of 1—2 inches in diameter. 



