Rev, M. J. Berkeley and Mr. C. E. Broome on British Fungi. 371 



acute at either extremity^ or even appendiculate, containing four 

 nuclei. 



Allied to S. Jenynsii, but more freely developed, smaller, with 

 shorter asci and smaller sporidia. We have only seen them 

 without septa, which they probably acquire in age. 



Plate X. fig. 23. Ascus and sporidia magnified. 



877. S. (Pertusse) brachythele, n. s. Peritheciis semi-immersis 

 globosis, ostiolo brevi papillaeformi ; ascis cylindricis; sporidiis 

 magnis subfusiformibus centro constrictis 1-5-septatis. 



On decorticated elder. Batheaston, Feb. 1859. 



Perithecia rather large, scattered, half-immersed, globose, 

 attenuated above into a short papillceform ostiolum ; asci cylin- 

 drical; sporidia "0013 inch long, subfusiform, with one side 

 more convex when seen laterally, strongly constricted in the 

 centre, at first uniseptate, at length 3-5 -septate ; endochrome 

 dark. 



Plate X. fig. 24. Sporidia magnified. 



878. S. (Pertusse) pertusa, Fr. Syst. vol. ii. p. 464, var. Bath- 

 easton. Onboardsof elm, &c. Elmhurst, Dec. 1851 ; St. Catha- 

 rine's, Feb. 1853, C. E. B. 



Differing from the typical form in not having any black stain. 

 Asci clavate, elongated. Sporidia biseriate, oblongo-lanceolate, 

 for the most part strongly constricted in the centi-e, uniseptate, 

 •0007-*0008 inch long ; each articulation containing two nuclei. 

 Occasionally two additional septa are formed, and the sporidia 

 are curved, and either even or constricted at the commissures. 

 In every case they are much smaller than those of S. Jenynsii. 

 Unfortunately we have no analysis of the typical form of S. per- 

 tusa. 



Plate X. fig. 25. a. Ascus magnified ; b. sporidia in various conditions, 

 magnified. 



879. S. (Pertusaj) Aspegrenii, Fr. in Kze. Myc. Heft 2. p. 40. 

 On blackthorn. Orton Wood, Leicestershire, Rev. A. Bloxam. 



Asci linear ; sporidia uniseriate, but not concatenate, oblong, 

 triseptate, enucleate, '0008 inch long, 



Plate XI. fig. 26. Ascus and sporidia magnified. 



880. S. (Platystomse) excipuliformis, Fr. Syst. vol. ii. p. 469, 

 var. On dead wood. King's Cliffe, &c., M. J. B. 



Sporidia fusiform, curved, with about six septa, '0012 inch 

 long ; commissures not constricted. The typical form, published 

 by Fries in * Scleromycctes Suecicse,' has sporidia of precisely 

 the same shape, but twice as long. We find them sometimes 

 •0028 inch long. Asci apparently uniseriate. 



Plate XI. fig. 2G*. Sporidium from ' Scl. Suec.,' magnified. 



24* 



