86 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Chaetomium spinosum, sp. nov. 



Aureo-flavum. Peritheciis magnitudine mediis, subglobosis, 290- 

 224 m (273-318X206-262), cirrhis instriictis; pilis lateralibus 

 numerosis rectis, rigidis, acutis, irregulariter et parum distincte sep- 

 tatis, basi atrobadiis, asperiilis vestitis, apice hyalinis, levibus; pilis 

 terminalibus rectis, rigidis, acutis, asperis vestitis, ramosis, ramis 

 ramulisque dilute olivaceis; ascis clavatis, octosporis, 41 X 7.5 ix, 

 p. sporif. 22 /i; sporidiis subdistichis, pallide olivaceis, oviformibus, 

 5.9 X 3.9 m (5.6-6.4 X 3.2-4). 



Growing in cultures of dung from Buenos Ayres (R. Thaxter). 



This is, apparently, a rare species having appeared but once. The 

 egg-shaped spores and the branched terminal hairs are peculiar to 

 the species. From the dark, stiff, spine-like shafts or the terminal 

 hairs arise slender, delicate, irregularly swollen and constricted 

 branches, from which secondarv branches arise. As the cirrhus of 

 spores forms the branches rise in the form of a column and in this way 

 a support is formed for the spore mass. 



Chaetomium ampullare, sp. nov. 



Ochraceum. Peritheciis majoribus, longissimis, 489 X 147 m (456- 

 532 X 137-167), sporidiis irregulariter conglobatis gerentibus; pilis 

 lateralibus paucis, gracilibus, regulariter et distincte septatis, l)asi 

 rectis, olivaceo-fuscis, asperulis vestitis, apice collal)entibus, levibus; 

 pilis terminalibus longis, gracilibus, distincte et regulariter septatis, 

 successive aureo-brunneis, aureo-flavis, hyalinis; levibus, ramosis, in 

 fila hyalina elongatis; ascis clavatis, octosporig, 45 X 9.7 ju? P- sporif. 

 23 /x; sporidiis subdistichis, laete olivaceo-flavis, utrinque umbonatis, 

 limoniiformibus, 8.1-8.9 X 6.4 /x- 



On culture of sail cloth from Lowell, Mass. On dung from North 

 Carolina (R. Thaxter). 



The species is clearly characterized by the very much elongated 

 bottle-shaped perithecium, and by the terminal hairs which are drawn 

 out into long, hyaline, tangling, easily collapsing threads. 



Chaetomium aureum, sp. nov. 



Griseum, pallide-olivaceum, lutescens, demum aureo-fla\um. Peri- 

 theciis minutis, globosis, 127 X 115 m (110-140 X 105-123), cirrhis 

 instructis, pilis lateralibus numerosis, tenuibus, rectis vel flexuosis, 



