THE CLASSIFICATION OF DISCOMYCETES. 
49 
species of a more elevated order, as Morchella , Verpa, Helvella , 
passing by the Peziza in the sections Aleuria , Lachnea ; descending 
by Humaria , Ascobolns to Ryparobius and Ascozonus ; ascending 
again in the Inoperculce by the small genera of Mollisia, Lachnella, 
Pliialea , as far as Leotia, Mitrula , and Geoglossum; that is to say 
almost to the height of the highest species of the first section, only 
changing very slightly, as I have shewn, the classification now 
generally adopted. 
FUNGI EGYPTIACI. 
Collecti per Dr. Georg Schweinfurth. — Determinati per 
F. de Thuemen. 
Ser. II. 
(Ser. I. vide li Grevillea VI., p. 102-104.) 
19. Phythophthora infestans. BeBy. Peronospora infestans. DeBy. 
Ad folia viva Solani esculenti Dun. Medinet in Fajum, I, 
77 (Specimina yalde corrupta !) 
20. Gloeosporium Schweinfurthianum. Thuem. Nov. spec. 
G. acervulis epiphyllis, subgregariis, sine macula, mediis, plano- 
verrucaeformibus sublenticularibusve, dilute olivaceis, vix emersis ; 
sporis longe ellipsoideis, simplicibus, utrinque subobtusatis, homo- 
genis, achrois, 16-18 mm. long, 7-8 mm. crass. 
In Erodii glaucophylli L’Herit. foliis vivis et languidis in 
deserto ad Wadi-Dugla pr. Cairo, 5, 79. 
21. Oidium erysiphoides. Fr. 
In Trigonellce stellatae Forsk. foliis vivis in deserto pr. Wadi- 
Ashar, 3, 77. 
22. Oidium erysiphoides. Fr 
In Fcenugrceci officinalis Moencli. foliis vivis pr. Adulh in 
Fajum, 3, 79. 
23. Oidium erysiphoides. Fr. 
Ad folia viva Lini usitatissimi Linn. Pr. Senura in Fajum, 3, 79. 
24. Oidium erysiphoides. Fr. 
In foliis vivis Viciae calcar atae DeC. Pr. Senura in Fajum, 
4, 79. 
25. Oidium medicagineum. Thuem. Nov. spec. 
O. caespitibus late effusis, epi-raro etiam hypophyllis, pulveraceis, 
dilute ochro-albidis ; hyphis brevibus e mycelio repente erectis, 
simplicibus, continuis, hyalinis; sporis numerosis, magnis, elliptico- 
parallelogrammis, utrinque obtusatis et minime angustatis medio 
subdilatatisve, episporio laevi, subcrasso, hyalinis, 26-28 mm. long, 
9-10 mm. crass. 
In Medicaginis denticulatae Willd. foliis vivis pr. Sserssene in 
Fajum, 3, 79. 
