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Tylostoma semisulcatum. Peridium subglobose, usually a little 

 longer than broad, 6 to 8 lines broad, g lines long, glabrous above, 

 ferruginous-tomentose on the lower half; ostiolum entire, stem 

 equal, about 2 in. long, even and glabrous or but slightly furfur- 

 aceous on the upper part, the lower part longitudinally sulcate, 

 whitish; spores ferruginous, globose, .00016 to .0002 in. broad; 

 threads of the capillitium colorless, not septate. 



Sandy soil. Nevada. Collected by C. W. Irish; communi- 

 cated by T. Taylor. 



This species is separated from T. mammosum Fr. by its peri- 

 dium, which is tomentose on the lower half and not depressed, and 

 by its stem, which is distinctly furrowed in its lower half. 



Lvcoperdon Bellii. Peridium about 2 in. broad, subglobose, 

 sessile, grayish or yellowish-brown, exterior peridium continuous, 

 adorned with numerous persistent hard angular irregular or sub- 

 stellate warts which are smaller toward the base, separable at ma- 

 turity from the inner peridium and falling away in flakes or patches; 

 the inner peridium thinner, paler, glabrous; capillitium composed 

 of long slender interwoven, slightly colored and occasionally 

 branched filaments, a little broader than the diameter of the spores ; 

 spores globose, olive-brown, .00024 to .00028 in. broad. 



Rocky ground. Digges Island, Hudson's Bay. August. Col- 

 lected by R. Bell; communicated by Prof. J. Macoun. 



This puff-ball is peculiar in its continuous but warty exterior 

 peridium, which is less friable than that of L. scparans. The peri- 

 dium appears to rupture irregularly, as in Calvatia. It is also well 

 marked by the dark olive-brown spore mass. 



Excipulina obscura. Perithecia cupulate, ]^ to y 2 line broad, 

 sessile, black, the margin at first incurved, then erect, thin ; hyme- 

 nium subgelatinous; spores subfiliform, curved, plurinucleate or 

 obscurely pluriseptate, hyaline, .0012 to .0018 in. long, .00016 

 broad, supported on short sporophores. 



Bark of hemlock trees, Tsuga Canadensis . Newfoundland. 

 Waghorne. 



Melasmia imitans. Perithecia hypophyllous, membranous, 

 variable in size and shape, commonly subelliptical or oblong, some- 

 what confluent in nerve-following lines, rugosely uneven, black, 

 opening irregularly ; spores subcylindrical, straight or nearly so, 

 colorless, sometimes obscurely plurinucleate, .0008 to .0012 in 

 long, .00016 to .0002 broad, oozing out and forming pallid globu- 

 lar or irregular masses or short thick tendrils. 



