llev. M. J. Berkeley and Mr. C. E. Broome on British Fungi. 267 



This pretty little fungus does not agree in structure with the 

 genus Dacrymyces, and is correctly placed in Nematelia by Corda, 

 who rightly suspected it to be Tremella virescens, Schum. 



375. Ditiola nuda, n. s. Stipite cylindrico brevi albo tomen- 

 toso ; capitulo subpileato corrugato aurantiaco. On fir stumps, 

 Apethorpe, Norths., Sept. 1835. 



About 1 line high. Stem rather thick, cylindrical, white, to- 

 mentose; head subpileiform, corrugated, sometimes umbilicate, 

 consisting of loosely packed threads, which above bear fascicles 

 of fertile branches. Spores oblique, oblong, obtuse, slightly 

 curved, attached by a short excentric pedicel, and containing 

 about three nuclei. 



This pretty species has the habit of Ditiola radicata, but it 

 does not root into the wood, neither has it any veil. It is a 

 Nematelia, with the nucleus elongated into a stem. It must not 

 be confounded with forms of stipitate Dacrymyces stellatus, which 

 produces its spores in moniliform branched threads. 



Plate IX. fig. 4. a. Ditiola nuda, nat. size ; b. hymenium highly mag- 

 nified; c. single spore still more highly magnified. 



376. Hymenogaster muticus, n. s. Globosus, juvenis candidis- 

 simus, demum fusco-tinctus rimosus ; intus pallide luteo-fuscus ; 

 cellulis laxioribus, sporis obovato-oblongis obtusissimis. Staple- 

 ton Grove near Bristol, 1845, and Nov. 18, 1847. 



About an inch in diameter, almost destitute of any absorbing 

 base, globose, scarcely at all lobed. When young pure white, 

 but changing with age, especially when rubbed, to brownish, 

 and at length much cracked. Substance pale yellowish brown, 

 rather firm and dry ; cells loose, but smaller than in some of the 

 allied species, clothed with reddish brown obovate oblong spores, 

 which for the most part are quite obtuse, without the slightest 

 trace of an apiculus, and contain two or three variously-sized 

 oil-globules. Smell very slight. 



Distinguished from all its more immediate allies by its pecu- 

 liar spores. It resembles much in general appearance H. olivaceus. 

 The spores of H. lilaciniis, Tul., are sometimes similarly shaped, 

 but not typically, a point which requires strict attention in this 

 genus. 



377. Hysterangium Thwaitesii, n. s. Subglobosus albus tactu 

 rufescens ; peridio membranaceo ; sporis oblongis apiculatis. 

 Leigh Wood, Aug. 2, 1848. A single specimen occurred in the 

 previous year on Aug. 22. 



Mycelium white, fibrillose, not much disposed to form mem- 

 branous expansions, spreading for some distance. Sporangium 

 globose or slightly irregular, white, slightly silky, when rubbed or 

 exposed to the air assuming a rufous tinge. Peridium membra- 



