364 BOTANICAL GAZETTE [October 



directions. Sporangiophores simple or rarely furcate, the abruptly 

 attenuated extremity usually straight or but slightly bent, and 

 bearing the primary sporangium ; one, or less often two, secondary 

 sporangia borne on short straight fine branchlets which project at 

 right angles, or may be bent slightly downward, and are opposite 

 when two are present. Primary and secondary sporangia minute, 

 spherical, smooth; containing one spherical spore, or less frequently 

 two, which are subhemispherical in shape, becoming somewhat 

 rounded. The spores hyaline, often, but not always, distinctly 

 roughened. Bisporous sporangia 11-12 ju; monosporous 8 p. Spo- 

 rangiophores, average, 48-55X5 /x. Hyphae 1-3 /x, segments to 

 6 . 5 /jl in diameter. 



This form was first found on pig dung at Burbank, E. Tennessee, more 

 than twenty years since, and has since been observed at Kittery Point, Maine, 

 on dung of skunk and of field mice, and also at Intervale, New Hampshire, 

 on dung of squirrels. 



The species appears to be not very rare, and has probably 

 escaped notice from its resemblance to some very insignificant 

 hyphomycetes of the Hyalopus type. Although all the strains 

 examined produce two-spored sporangia, which are in some cul- 

 tures very abundant, in one instance at least they are very rare, 

 and may be found only after long-continued search among the 

 predominant one-spored type. Both the primary and secondary 

 sporangia may produce two spores without regularity and on the 

 same sporangiophore ; a one-spored primary sporangium may even 

 be associated with a two-spored secondary one. Both this and 

 the succeeding species grow readily on rat-dung agar, fruiting 

 abundantly. 



Haplosporangium decipiens, nov. sp. — Plate XXIX 



Similar to the last. The sporangiophores on the average con- 

 stantly somewhat larger, the sporangia always one-spored and 

 nodding, the sporangium wall roughened by minute folds, the 

 spores spherical and smooth. Sporangiophores, average 60-65 n- 

 Sporangia 8-10 n. 



This species, although it has been cultivated from the original material, 

 has been seen but once and was found on dung of the curious cave-dwelling 



