i;62 CRYPTOGAMIA. ALGAE. 1938. Lichen. 



*cirtafpys. Greyifh-glaucous : fhields brownifh, raifed above the 



cruft, with a flattifh difk and proper brownifh margin. 

 scellatus. Tartareous, teifellate, grey: fhields black, with a flattifh 



difk and flat entire margin. Hoffm. t. zo.f. 2. 

 diamartus. Somewhat determined, tefiellate, ruily-red: fhields de- 

 formed, at length emerging, flattifh, black, at lad with a raifed 

 margin. 

 Wulfenii? Mealy, purplifh rofy, with blackifh-red margin and fer- 

 pentine cracks: fhields black. Hoffm. /. 15./. 1. 

 2. pur pur as c ens . Pale fcarlet, pitted with molt, minute fhields. Hoffm % t.\y. 3. 

 14. Shields thickifh, raifed above the frond, with « dijlintt margin 

 •f the colour and fubjlance of the frond: frond various. Parme!ia« 

 a. Frond crustMceous, uniform. Lecanaria. 

 *ater. Rugged-granular, uneqaal, whitifh-grey.fhields black, at length 

 convex, with a white border becoming flexuous and crenulate. 

 Engl. Bot t. 949. 



£. argophoiis. Tartareous, glebular-warty, glabrous, pure white; warts 

 becoming fomewhat imbricate (lightly lobed and deformed : fhields 

 brown-black, with a white margin at length inflected crenate and fome- 

 what lacerated. 

 fyenfragofus. Effufe, glebular-warty, uneven, greenifh : fhields crow- 

 ded, plano-convex, black, with an entire greenifh margin becom- 

 ing fomewhat crenate- 

 exiguus. Leprous, thin, uneven* dull grey: fhields minute, cluftered, 

 black, with a white crenulate margin, becoming a little convex 

 with a brownifh evanefcent margin. 

 Acl. Stock. 5. /. 5./. 6. d. e.f 

 2. pinicolus Thin, granular-mealy, greyifh: fhields very minute, crowded, 

 flat, black, with a black and white margin. 

 fcphades. Nearly orbicular, granular, dull grey-green : fhieldfl 

 crowded, flat, becoming a little convex, black, with a rather 

 tumid entire margin. 



2. pyrinus. Eifufe, thin, granular- mealy, greyifh green: fhieids minute, 



fefBle, a little concave, black-brown withaa entire margin. 



3. archaus. Effufe, unequal, rugged, blackifh-grey: fhields cluflered, flat, 



black, with a thin entire grey brown margin. 

 milvinus Tartareous, effufe, warty-granular, rufty-brown : fhields 



flattifh, black, with a railed entire margin. 

 fericleus. Leprous, thin, fomewhat uifperfed, white: fhields convex* 



blacky with rough dots; the margin of the bafe white-mealy* at 



length fubevanefcent. 

 efybryon. Leprous, mealy, fnowy . fhteids purplifh-black, with s 



white margin. J**e<[. 4 t, 7,/* 4. 

 tjtracodcrmus Tartareous determined, ruggedly tciTellate, white* 



flocular- mealy: fhields apprelTeci* riattifh, roughs black* with* 



deprcJTqd entire margin. 



