Dearness: North American Fungi 



347 



fraga in Greenland. But the bristles near the vertex, the brown 

 subiculum and the fruit characters bring it closer to S. trichophila 

 Karst. The last inhabits species of Pedicularis in West Green- 

 land. Saxifraga seems to be a new host for it. Rostrup found 

 the sporidia on Pedicularis 20-25 X 6-7 //. ; this has asci 45-62 X 

 1 5-1 6 fi and sporidia 15-18 X 5-6/x,. 



On Saxifraga N elsoniana D. Don., Camden Bay, northern 

 Alaska. F. Johansen, Can. Arc. Exped., June, 191 4. 



5. Venturia subcutanea sp. no v. 



Perithecia membranaceous, nearly black, gregarious, erumpent 

 through or covered by the loosened cuticle, hypophyllous, attached 

 to a subicle of septate, branching, brown fibrils, 4-20 thick, 

 making orbicular spots 1-4 mm. in diameter ; hardly visible on the 

 upper side of the leaf but opaque when held to the light. Some 

 of the perithecia bearing few to 10 short, rigid, brown bristles 

 near the stoma, others smooth; piano-globose to conic, 90-1 50 fx. 

 Asci 8-spored, aparaphysate, often broadest near the base, 54- 

 66 X 10-15 /a, the walls 2 fi thick. Sporidia 1 -septate, fuliginous, 

 often biseriate in the lower half, 15-17 X 4-5~6/x. 



On dead leaves of Salix reticulata L., Kongengevik, N. Alaska, 

 June, 1 914. F. Johansen, 6 3 b, Can. Arc. Exped. 



This variable species was sought in lists of Sphaerella, Asterina 

 and Venturia. The perithecia attached to the cuticle seem to lack 

 the bristles while those that are free from it but covered by it 

 possess them. 



6. ( ?)Myrmaecium Cannae Dearn. & Barth. sp. nov. 



Stromata minute, mostly about .25 mm., largest 1 mm., scattered 

 over the leaf, erumpent on both sides but mostly hypophyllous, 

 blackened by the perithecia. Perithecia black, one to several in 

 a stroma, 17 the largest number counted in one stroma, globose to 

 truncate-conic, 90-180/*. Ostiola short, blunt, black, shining. 

 Asci short-stipitate, 60-90 X 6-10 p ; paraphyses linear, some of 

 them branched. Sporidia hyaline, 1 -septate, upper cell larger, 

 10-15 X 4-8 /a. Some of the perithecia filled with conidia and 

 sporophores; conidia linear-oblong, obscurely i-septate, 15 X 

 2-5-3/*. 



On withered leaves of Canna Indica L., Cabo Rojo, Porto Rico, 

 Oct., 1 91 2. F. L. Stevens. Ex herb. Bartholomew 303. Type 

 collection, Fungi Columb. 5038. 



