1913] The Ottawa Naturalist 119 



ium and hypothecitim without color, paraphyses distinct, 

 slender, discrete, asci inflated, hymenial gel. with I + 

 faint blue. 



Bark of willows. Sidney, Vancouver Island; Prof. J. Macoun. 

 Near to Phlyctis argena (Ach.) Koerb, but differing in the 

 color of the thallus and aspect of the apothecia. The whole 

 appearance of the plant is that of a Pertusariti. Type in 

 herbarium Merrill. 



Biatora (Biatorina) Grifflthii var. Pacifica (Tuck.) comb. nov. 

 Biatora mixta Pacifica Tuck. Syn. Pt. 88, p. 30. 

 Thallus thin, ashy for the most part, limited and decussated 

 by black hvpothalline lines. Apothecia small to minute, 

 depressed, plane or convex, from waxy, through various 

 shades of brown, or finally blackening, sometimes pruinose, 

 margin persistent or sub-persistent, but not conspicuous, 

 not showing the color mutation of the disk and commonly 

 brown. Spores 8, fusiform or oblong-ellipsoid, straight or 

 curved, one-septate or rarely with two septa, 12-15 x 4-5/z, 

 hvmenium and hvpothecium without color, asci ventricose- 

 clavate, paraphvses distinct, coherent, epithecium fuscescent 

 downward, hymenial gel., with I + intense blue. 

 Bark of alders, willows, oaks and other tree's. Sidney, 

 Vancouver Island; Prof. J. Macoun. 



Apothecia sometimes strongly convex, blackening, and 

 excluding the margin. When the disk is pruinose or light 

 colored the margin is conspicuous from its darker hue. 



Biatora (Biatorina) Columbiana sp. nov. 



Thallus effuse, thin and granulate, or thicker and areolate, 

 cinerous or greenish-cinereous. Apothecia small or moderate 

 (1-2 mm.), at first concave with a relatively thick margin, 

 but ultimately strongly convex and immarginate, brownish- 

 black or black, the margin concolorous. Spores 8, ellipsoid 

 or fusiform-ellipsoid colorless, 16-18x4.5-6^, hvmenium 

 hyaline or suffused with purple, hvpothecium blue or green, 

 asci clavate or ventricose-clavate, paraphyses distinct, 

 slender, discrete, tips purple, hymenial gel., with I + blue. 

 Bark of alders, maples and Douglas fir. Sidney, Vancouver 

 Island; Prof. J. Macoun. 



The affinities of the plant are with B. Laureri, and B. atro- 

 purpurea. 



The hypothecium is often imposed on a stratum of con- 

 fused hyphema of a distinctly purple color. Under the 

 microscope the hvmenium is a beautiful object. 



