MTXOGASTEES. 383 



1109. Diderma spumarioides. Fr. " Effused Diderma." 



Effused, crustaceous, cohering ; peridia subrotund, or irregu- 

 lar ; exterior white ; interior ash-colour, often confluent in a 

 cellulose crust, columella spurious, white, as well as the flocci ; 

 sporesblack.— i^r. ^S'.M.iii./?. 104:. iWc/i. ^. 96,/. 2. BulLt.\=l\, 

 /.2. Sow.t.1^^. Fl. Dan.t.l^l^J.'2. Eng. Fl.Y.p.Ul. 



On leaves, moss, &c. 



The specimen before me lias obovate-oblong, distinct peridia, stems aris- 

 ing from the hypothallus, a cylindrical central white columella, and flocci 

 of the same colour, mixed with the spores. The stem is entirely formed 

 from the hypothallus and hyaline. — M. J. B. 



C . Sessile. 



1110. Diderma lucidum. B,^^Br. " Bright Didenna." 



Subglobose, sessile, splitting in a somewhat stellate manner, 

 bright reddish yellow, internally yellow, mass of fruit globose, 

 black ; flocci brown, triangular at the points of ramification, and 

 yellowish ; spores globose, black, very minutely echinulate. — 

 B. 4- Br. Ann. N.H. no. 938, 1. 15,/. 9. 



On Jungermannioe and moss. 



Scattered or crowdpd, peridium subglobose, splitting in an irregular stel- 

 late manner. Spores ('0005 in.) "0125 ra.m. diameter. Smaller than D. 

 vernicosum, in which the spores are incKned to be angular,- and much paler 

 xmder the microscope. 



1111. Diderma Trevelyani. Fr, " Trevelyan's Diderma." 



Sessile, ovate or globose ; outer peridium sjolitting into many 

 regular, linear, subreflexed, laciniae ; inner obsolete ; columella 

 minute; spores black. Fr.S.M.iii.p.lOo. Grev.t.lo2. Eng.Fl. 

 v.i?.311. 



On Bryum ligulatum. 



In specimens communicated to Sowerby by Mr, Trevelyan there is a very 

 short, but distinct cylindrical stem, the peridium at first appears under the 

 lens like a coriander seed, pale-brown, with pallid striae, which indicate the 

 points at which it ^\dll split, and perfectly smooth. Within this is a distinct 

 white inner peridium, lining it very closely, and probably in general break- 

 ing off with it. Flocci greyish. I can find no trace of a columella. — J/. J- B 



1112. Diderma Cazmichaelianuxn. BerTi, " Carmichaers 



Diderma." 



Perfectly sessile, outer peridium brick-red, splitting into many 

 revolute rays, inner white, intimately connected with the outer ; 

 columella large, spores black-brown. — Eng. Fl. Y.p. 34. 



