GEOLOGICAL SURVEY OF THE TERRITORIES. 791 



Placodium vitellinum, (Ehrb.,) Acb. — On dead wood. (21.) 



Plaeodium luteo-mimnm^ Tuckenn. Licb. Calif., p. 18. — A small Placo- 

 diain growing among mosses, wbicb seems referable bere. (22.) 



Placodium , (?) — A few scattered apotbecia witb a plane ferra- 



gineous disk, in rocks among otber licbens, not sufQcieutfor determina- 

 tion. (23.) 



Lecanora ruhina, Acb., \;\r. 2>eltata, D. C. (24.) 



Lecanora ruhina, Acb., var. opaca, Acb. — Tbe specimens of botb these 

 varieties abundant. (24a.) 



Lecanora muralls, (Scbreb.) Scbair. (25.) 



Lecanora , (?) (2G.) 



Lecanora , (?) (27.) 



Tbese two licbens belong to tbe section Squamaria, but I am unable 

 to identify tbem from tbe scanty fragments. ,Tbe tballus resembles 

 that of L. eartilaginea, as described, but tbe apotbecia are like tbose of 

 L. suhfnsca ; in tbe one witb a convex, rufous fuscous disk and entire 

 margin ; in tbe otber witb a plane, black disk and Hexuous margin. 

 Spores simple, .012-15 min. long, one-balf as wide. Botb are perbaps 

 .forms of tbe same plant. 



Lecanora sid)fusca, Acb. — On stones and dead wood. (28.) 



Lecanora varia, Fr. — On dead wood. (20.) 



Lecanora Hageni, Acb.— On stones. (30.) 



Lecanora cinerea, L., var. IToffinanni, Acb. — Some of tbe specimens 

 liave a plicate crust, but seem not separable. (31.) 



Lecanora rhagadiosa, Acb. {Acaraspora scahra^Th. Fr. Scand., p. 208.) — 

 Eed Mountain, elevation 9,000 feet. JSTew to tbis continent, and, witb 

 Jjccidia mamillaris mentioned below, an interesting addition to tbe few 

 lichens coiul*^^^^ to only tbe western slope of Nortb America and Europe. 



(32.) " - ..„ 



Lecanora xantliopliana^ Nyl. — On iJC- ^" (_ "^v 



Lecanora chlorophana, (Wabl.) Acb. — On rocks. 



Lecanora Schleicher i, (Ach.^) Nyl. — On tbe earth, tbe specimens ^rp""^^* 

 (35.) - "---^ 



Lecanora cervina, (Pers.,) Somf., var. glaucocarpa, Somf. (35.) 



Lecanora cervina, (Pers.,) Somf, var. squamulosa, Fr. — Some of tbe 

 specimens have prominent brownish black spermogoues with minute 

 spermatia, .002 min. long. (3C«.) 



Lecanora cervina J (Pers.,) Somf., var. glehora, (Kbv.) — Tbe specimens 

 are numerous, some of tbem ai^roacbing tbe var. disacta, Fr. (3G^.) 



Lecanora , (?) Tballns areolate verrucose, csBsius pruinose. 



Apotbecia immersed, 1 to 3 in the areoles, the disk plane, black or 

 white pruinose. Tbekes myriospborous. Spores elliptical, .005-.006 

 min. long, one-half as wide. On rocks witb tbe preceding, from which 

 it is perhaps distinct. (37.) 



Einodinasophodes, (Acb.,) var. exigna, Nyl. — On dead-wood. (38.) 



Einodina Bischojii, (Hepp.,) Kbv. — On rocks. (39.) 



Gladonia pyxidata, Fr. (40.) 



Cladonia gracilis, Fr., var. verticiUata, Fr., Charles H. Peck, esq, (40i.) 



Cladonia fumhriafa, Fr. (40a.) 



Cladonia rangiferina, Hoffm. (41.) 



Cladonia squamosa, var. delicata, Fr. Charles H. Peck, esq., (41&.) 



Biatora decipiens, Fr. (42.) 



Biatora luridella, Tnckerm. (43.) 



Lecidea contigua, Fr. — A single specimen. (44.) 



Lecidea (?)— A small licben on dead wood, with the habit of L. 



melancheuria, but witb larger spores. Perhaps to be referred to L. sahu- 

 letorum, Fr. (45.) 



