DECADES OF FUNGI. 143 



marked here and there with little raised lines. Stem confluent with 

 the pileus, compressed, short, minutely tomentose, attached by an irre- 

 gular disc, which is rough with little gill-like processes. Gills dark 

 brown or black, moderately broad and distant, entire, decurrent, thin; 

 base clothed like the stem, 



X 



On a larger scale than P. dealbatns, and of a less pure white when 

 dry, Panus Vinesii and P. melanopTiyUns are allied but distinct spe- 

 cies. The little elevations at the base are not, I think, entirely de- 

 pendent on the inequalities of the matrix. (Tab. V. %. 6. P, Sprucei, 



nat. size.) 



ScMzophyllum commune, Fr. Ep. p. 403. Spruce, n. 137. 

 Hab. Abundantly in recently cleared ground throughout the Rio 

 Negro and Uaupes districts. 



Lenzites applanata, Fr. Ep. p. 404. Spruce, n. 66 (junior). 

 Hab. On dead trunks. Jauarate-cachoeira. February, 1853. 



L. deplanata, Fr. Ep. p. 404. Spruce, n. 65, 59. 

 Hab. On dead trunks. Jauarate-cachoeira. October, 1853. Mar- 

 ginal zones slightly tawny. 



* X. striata, Fr. Ep. p. 406. Spruce, n. 132. 

 Hab. Very frequent on half-burnt logs in ro9as on the Eio Negro 

 and Uaupes. 



539. Polyporus (Mesopus) atigiistus, n. s. ; pileo orbiculari crassius- 

 culo coriaceo suberoso, profunde umbilicato, crebri-zonato, rugose, 

 umbrino albo-variegato ; stipite valido umbrino, epidermide Crustacea ; 

 hymenio primum piano, sicco concavo, albo, poris minutis punctiformi- 

 bus. Spruce, n. 211. 



Hab. On a dead branch. January, 1853. Panur^. 



Pileus 10 inches across, orbicular, coriaceo-suberose, moderately 

 thick, convex, with a broad umbilicus, marked all over with radiated 

 wriukles and very numerous zones, umber, variegated with white; 

 substance white. Stem 5 inches high, rather uneven, slightly incras- 

 sated upwards, 1 inch thick. Hymenium white, plane when fresh, 

 concave when dry. Pores minute, yfo ^^ ^" ^^^^ across, punctiforra. 



This most 'magnificent species resembles PoL sacer, from which it 

 differs in its more frequently-zoned, rugose pileus, its smooth not vel- 

 vety stem, and its minute pores. Only a single specimen appears to 



have been found. 



540. P. (Mesopus) camerariu^y u. s- ; pi'^^ crassiusculo rigido pul- 



