-78- 



Apothecia small, sessile, crowded, entirely concealing the thallus at the centre,, 

 more or less convex, reddish-brown, the margin inconspicuous. Spores 8, ob-- 

 long-ellipsoid, 8-10 x 5 h^'pothecium colorless, paraphyses distinct, epithe- 

 cium infuscate, asci ventricose. 



On willow trunks, Rockland, Also detected in material from Nova Scotia.. 

 Biatora {CatUlaria) Hochstetteri (Koerb.) comb. nov. 



Catillaria Hochstetteri Koerb. Parerga Lich. p. 195. (1865.) 



Thallus thin, smooth or slightly irregular, brownish or ashy-brown, the 

 color modified by the hypothallus. Apothecia sessile, plane, opaque, black, with a 

 thin entire margin. Spores 8, ellipsoid, but with the terminations more or less- 

 acute, bilocular, colorless, 18-22 x lo-ii /x, hypothecium brown, paraphyses 

 distinct, diffluent, slender, the tips blackish or greenish. 



On shaly rocks in a pasture, Rockport. 



Apothecia more lecidiiform than biatorine, but the exciple is not carbon-^ 

 aceous. 



New to America. 

 Biatora {Catillaria) grossa (Pers., Nyl.) comb. nov. 



Lecidea grossa Pers. in herb. Moug. et Nyl. Prodr. p. 139. (1857.) 



Heterothecium grosstim of Tuckerman Syn. Pt. II, p. 54. 



On trunks of willows. Warren. 



Reported from Newfoundland; Grand Manan Is., N. B.; Anticosti Is.;; 

 Cape Breton Is.; and the Gaspe region of Quebec, the plant seems known only 

 in the United States as here mentioned, and from one station in Nebraska, T. 

 A. Williams. 



Biatora {Bilimbia) trisepta Naeg, ex Miiller in Mem. Soc. Phys. Hist. Nat. 

 Genev. 16: 404. (1862.) 



Thallus effuse, granulose, grayish or dark. Apothecia minute (0.05 mm.)' 

 scattered or congregated, convex, black, the margin excluded. Spores 8, fusi- 

 form, three-septate, 19-24 x 3-5 ^, paraphyses concrete, hypothecium colorless, 

 asci ventricose. 



On a pebble by the roadside, Camden. 



Reported from Labrador by Arnold, and from New Bedford and Quincy,.. 

 Mass., by Henry Willey. 



Biatora {Bilimbia) sabuletorum var. obscurata (Sommerf.) A. L. Sm. Mon. 

 Brit. Lich. Pt. II, p. 143. (1911.) 



The species is equivalent to B. hypriophila (Turn.) Tuck, of Tuckerman's 

 Synopsis. 



Thallus minutely rugose-granulose, pale ashy to white. Apothecia medium,, 

 numerous, at first concave or plane with a rather thick margin, but ultimately 

 convex and immarginate, brown, reddish-brown, dark brown or sometimes- 

 black. Spores 8, ellipsoid or sub-fusiform three-septate, 17-30 x 5-9 fx, para« 

 physes distinct, sub-coherent, tips yellowish-brown, hypothecium brownish^ 

 I + bluish > violet or wine-red. 



On decayed wood. Warren. 



