CONIOCYBE.] 



CAUCIKI. 



jOI 



-i. C. hyalinella Xyl. Mem. Soc. Chtrb. v. (1857) j). 93; J-^vn. 

 i. ]). 1(»4, t. V. f. 40.- — Thalliis obsolete. Apotliecia small; sti])eh 

 slender, hyaline, brownish above ; caj)itulum fjlobose ; sporal mass 

 white or pale- reddish ; sjjores minute, 0,0025-0,001 mm. in dia- 

 meter. — Cromb. Lich. Ih'it. p. 14 ; I.eight. Lich. El. p. 47, ed. 'A, 

 p. 46. 



Occasioually there are traces of a very thin, whitish, and leprose thal'ns, 

 but it is diiubtful if tliis be proper. It is closely allied to C. judlidn, but 

 differs in the more slender stipes, aud in the spores being at least half 

 the size. 



Hah. On indurated stumns of trees in wooded npland districts. — 

 Disfr. Found only very t^paring'ly in N. England. — 1>. .M. : Brantsdale, 

 Yorkshire. 



24. TRACHYLIA Fr. Vet. Ak. 

 Handl. 1821, p. 1524, pro parte ; Xyl. 

 Mem. 8oc. Cherb. iii. (1855) p. 1(57; 

 Lich. Scand. p. 44 (note).— Thallus 

 granulose, or rarely subleprose, or 

 wanting. Apothecia sessile, cuj u- 

 liform, open, black, with thin pro- 

 per margin : sporal mass more or 

 less accumulated, black ; spores 1- 

 septate, rarely jduri-septate and 

 irregulaily divided, ellipsoid, black- 

 ish or brownish-black : hymenial 

 gelatine scanty and scarcely tinged 

 with iodine. Spcrmogones with ob- 

 long or ellipsoid spermatia. 



Distinguished from the allied genera 

 bv the apothecia being constantly -7, , ,. S- -'■ 



sessile, almost lecideiform, and the ^'"r'^f'^ tjimpancUa Fr.-a. Ver- 



ellipsoid spores. As already noted ^i,"'''^,,'^ /°''t^, an apothec.um. 



I ri T ■ i- i -i.- X oU. b. iheca (with yoiins 



under CaUcium refmens, transition b,,^,.o,> „„ i „ 1 ■ ., -i-n 



o , ^. \ rn 1 7- spores) aud a paraphvsis, X 3.->0. 



forms are nut wanting, and /rac/^/z/ia ^. Older (free) spoVes x m> 



may not be generically distinct. Ihe d. Vertical section of a spern.o- 



gonidia are globnlose. gonium. x m. e. Sterigiuata 



and spermatia, 500. 



1. T. tigillaris Fr. Sum. Veg. (1846) p. 282.— Thallus effuse, 

 granulose, or granulato-areolate, or concrescent, usually rimose, 

 yellowish- green or citrine (K— ). Apothecia small, plane, innate,' 

 black, the margin prominent, at length excluded : spores 1 -septate, 

 0,015-25 mm. long, 0,008-11 mm. thick.— Cromb. Lich. Brit. p. 14: 

 Leight. Lich. Fl. p. 48, ed. 3, p. 47.~AeoHwn tir/iUare Grav, Xat! 

 Arr. i. p. 482 ; Mudd, Man. p. 254. CaUcmm 'tigiUare Turn, ct 

 Borr. Lich. Br. p. 132 ; Sm. Eng. Fl. v. p. 139. Lichen tigiUaru 

 Ach. Prodr. (1798) p. 67 ; Eng. Bot. t. 1530. 



There is a striking contrast between the colnur of the thallus and of 



