282 



Sphaeria ochracea. Pera. Mycol. Europ. I., t. 1, f. 1-2. 

 Oryptosphaeria aurantia. Grev. t. 78. 



I have never met with this species, which seems more inclined to affect 



the fleshy Agaricini. Tulasne records it upon Russula emetioa and adusta. 



Ditmar's figure of the conidia is upon a Russula, as well as Greville's figure of the 



conidia (t. 126), and of the perithecia (t. 78). It is only right, however, to state 



that some of Greville's specimens now extant in the Kew Herbarium are clearly 



H. auraniius ; but H. aurantius was never known by me to occur upon a Russula. 



In the Edinburgh Herbarium, there is a specimen upon some Agaric which looks 



very like H. torminosus. 



Plate 6. a Hypomyces. Nat. size. 

 i Peril hecia X 15. 

 c Perithecium X 60. 

 d Conidia X 400. 

 e Asci and sporidia X 400. 

 y Free sporidia X 800. 



8. Hypomyces Tulasneanus, Plo^v. Conidia hyaline, oval, 

 smooth, borne singly on the end of the branches of the mycelium ; "007- '015 mm. 

 long by "005- "006 mm. wide. 



Chlamydospores large, yellow, narrowly oval, with an attenuated apex, 

 attached at the base to the dilated extremity of a hyaline mycelial tube ; '016- '02 

 mm. long by "01 mm. wide. 



Perithecia small, ovato-globose, with a rather obtuse ostiola, which emerge 

 from a dirty, yellowish green, thin subiculum ; 0-25 mm. long by "02 wide. 



Asci elongate, cylindrical, ■12-"15 mm. long by "01 mm. wide. 



Sporidia eight, hyaline, lanceolate, usually simple, "02- "025 mm. long by 

 ■008 mm. wide. 



Hypomyces luteo-virens, Tul. Sel. Fung. Carp, iii., p. 57, t. 8, f. 15-16. 



„ „ Cooke Hdbk., p. 778. 



Sphaeria luteo-virens Fries Sys. Myc. 11., p. 339, in part. 



Hypoorea luteo-virens Fr. Sum. Veg. Sc, p. 383, in part. 



„ ,, Berk, and Broome Ann. N. H., No. 594. 



,, ,, Currey Linn. Trans, xxii., t. 46, f. 53. 



On Boletus, Lax ton, M. J. B. On Boletus, Mattishall, Sep., 1880, C. B. P. 



This species is quite distinct from H. luteo-virens of Fries. It is much less 



brightly coloured, has very distinct chlamydospores, and affects Boleti. 



Plate 7, Fig. 1. a Boletus infested with the Hypomyces. Nat. size. 

 b Perithecium X 20. 

 c Perithecia X 140. 

 d Chlamydospores X 400. 

 e Asci and sporidia X 400. 

 / Sporidia X 800. 



9. Hypomyces luteo-virens, Fries. Conidia oval, hyaline, born 

 on the tips of hyaline, verticillate, trivaricately branched tubes. Stroma, a wide- 

 ly effused, thin tomentum, at first bright egg-yellow, becoming greenish, then 

 almost black. 



