336 Transactions of the Society. 



TricJiia advenula, Mass. (n. sp.), fig. 38. 



Sessile on a broad base, densely crowded, rarely scattered, circular, 

 or subangiilar from mutual pressure, primrose-yellow, rather shining ; 

 mass of capilUtium and spores orange ; elaters cylindrical, 4-5 /x 

 thick, usually inflated at one or both ends and also with from 1-3 

 inttrstitial swollen portions, beyond the swollen ends, terminating 

 in a thin straight or usually fexuous slender spine 15-20 /x long, 

 spirals very close, thin, but little prominent, almost obsolete on the 

 inflated portions ; spores globose, minutely verruculose, 12-14 /x 

 diameter. 



(Type in Herb. Berk., Kew.) 



On rotten wood. Scotland (Glamis !). Forming densely crowded 

 patches, 1-2 inches across. Most nearly related to Trichia minima, 

 but distinguished by the long, slender tips to the elaters and the 

 interstitial swollen parts ; in T. minima the capillitium and spores are 

 pale primrose in the mass, and not orange as in the present species. 



Trichia minima, ]\Iass. (n. sp.), fig. 1.8. 



Sporangia crowded, sessile on a broad base, circular, elliptical, or 

 irregular from mutual pressure, pale primrose-yellow ; mass of elaters 

 and spores same colour; elaters cylindrical, 6-7 jjl thick, ending in 

 smooth tapering points about 8-10 /a long, spirals thin, rather 

 distant, not prominent, without spines ; spores globose, very minutely 

 warted, 10 /x diameter. 



(Type in Herb. Kew.) 



On wood. Britain (Oldham !). 



Allied to T. scahra, but distinct in the smaller size of every part, 

 and in the absence of spines on the spirals of the elaters. In colour 

 resembling T, chrysospierma. 



Trichia nana, Mass. (n. sp.)., fig. 12. 



Sporangia scattered or aggregated, rarely crowded, sessile on a 

 broad base, smooth, pale bright ochre, opaque, wall very thin ; mass 

 of elaters and spores pale primrose yellow ; elaters cylindrical, 3-4 

 /i thiclc, spirals irregular, very distant and prominent, tips abrupt, 

 the spirals usually running quite to the end ; spores ^oho^e, minutely 

 verruculose, 6-8 [x diameter. 



(Type in Herb. Kew.) 



On wood. Westbrook, Maine ; U.S. ! 



Sporangia rarely exceeding -5 mm. diameter, hemispherical or 

 sausage-shaped and curved. By far the smallest of all known species, 

 resembling superficially Trichia minima, from which it differs in the 

 distant and prominent spirals of the elaters ; in the latter character it 

 agrees with T. varia, but differs in the spirals not being markedly 

 more prominent on the convex side of bent elaters, the abrupt tips, 

 and smaller size of every part. The elaters are rarely more than 

 200 fji long. 



