Massee and Crossland : New British Discomycetes. 189 



cortex to perfectly globular cells 40-60 fi diam. forming a cortical 

 layer 2-3 cells deep ; asci cylindrical, 350-390 x 16-20 /a, apex 

 rounded-truncate, foot narrowed and curved; spores 8, obliquely 

 i-seriate, hyaline, broadly elliptical, smooth, constantly 2-guttu- 

 late, continuous, 19-21 x 12-13 /*» guttae 7-8 ^ diam.; paraphyses 

 slender below, gradually becoming clavate at apex, where they 

 are 7-8 /* thick, 1-3 septate, brown above, hyaline below. 



Hab. — On dead thorn wood in running water, in several 

 places about Halifax. On larch cones in swamp, Hebden 

 Bridge, J. Needham, 1899. On branch laid in stream, Mulgrave 

 Woods, Whitby, Y. N. U. Fungus Foray, September 1900. 

 Apparently a semi-aquatic species. 



The ascophores collapse and become quite flat and blackish 

 when dry. When fresh a reddish line marks the boundary of 

 the hymenium. The rounded apices of the asci become a little 

 depressed in the centre prior to the expulsion of the spores, 

 after this has taken place the torn edges of the aperture stand 

 erect, or are slightly reflexed. No trace of a septum has yet 

 been found by us in any of the spores. 



The gelatinous nature of the ascophore scarcely warrants 

 this species being placed in the genus Humaria. Kalchbrunner 

 formed a new genus, Peltidium, for its reception. 



Mitrophora rimosipes Lev., Ann. Sci. Nat., Ser. iii., Vol. V. 

 (1846), p. 250. 



Ascophore obtusely conical or sometimes almost subglobose, 

 lower margin quite free from the stem for some distance, ribs 

 prominent, anastomosing to form irregularly polygonal pits, 

 dingy ochraceous with an olive tinge, 1-2 cm. high and nearly 

 as much across the base ; stem 5-10 cm. long, 1*5-2 cm. thick, 

 generally thickest downwards, hollow, wall thin, subdiaphanous, 

 externally whitish, and coarsely longitudinally grooved or striate, 

 the interstices of the cracks farinose, as is also the inside of the 

 stem; asci cylindrical, apex rounded, about 300x16-18 // ; 

 spores 8, obliquely i-seriate, elliptical, ends obtuse, 20-25 x 12- 

 15 fi; paraphyses cylindrical, apex clavate, colourless. 

 Syn. Morchellci rimosipes DC, Flor. France, II. (1805), p. 214; 

 Sac, Syll. VIII. (1889), n. 22. 



On the ground, Edith Weston, Rutland, May 1899 (Miss 

 Crowther-Baynon). 



Allied to Mitrophora semilibera Lev., but recognised by the 

 larger spores, and more especially by the conspicuous grooves 

 or cracks in the substance of the upper part of the stem. 



1001 Juno 1. 



