82 The Scottish Naturalist. 



17. P. Chrysosplenii Fuckel., 8. local on 

 Chrysosplenium oppositifolium, near Forres (Rev. Dr. Keith). 



Not previously recorded as British. 



18. P. leptosperma De Bary (Scot. Nat., 1883, p. 35), 8. 



Local on Matricaria inodora, near Forres. 



19. P. grisea Unger, 5, 7, 8. Common on 



Veronica Beccabunga. 



20. P. effusa (Grev.) Rabh, 1, 3, 5, 8. Locally common on 

 Spinacia oleracea. 



Chenopodium album. 



21. P. Urticae (Lib.), 5, 7, <?, on 



Urtica urens, common. 



U. dioica, rare, once near Aberdeen, differing to some 

 extent from the form on U. urens. 



22. P. Candida Fuck, 3, 5, 7, 8, 10. 



"On leaves of Primuke " (Mycol. Scot., No. 1456). I have 

 never seen a specimen of this fungus from Scotland. It 

 must be rare among us ; and most of the Scotch records 

 probably belong to Ovularia primulana Thuem., or to 

 Ramularia or Cercospora, of all which I have found 

 examples in the East of Scotland. 



Sub-sect. III. Oospores unknown. 



23. P. SOl'dida Berk. 1, 5,7, 8. Occasionally on leaves of Scro- 



phularia nodosa. 



24. P. Scleranthi Rabh, 7. At Muchalls, near Aberdeen, on 



Scleranthus annuus (Scot. Nat., 1883, p. 35, sub P. 

 Alsinearum). 

 The following species, referred in Mycologia Scotica (p. 278) to 

 Peronospora, belong, not to Peronosporece, but to Muce- 

 dinea, viz.: 

 No. 1457. P. obliqua Cooke is Ovularia obliqua (Cooke) Oud. 

 1458. P. interstitialis B. and Br. is probably an Ovularia. 

 ,. 1459. P. rufibasis B. and Br. is a Ramularia, sub-genus 

 Didymaria, and R. destructiva Ph. and PI. is the same 

 species, on the twigs instead of the leaves. 

 APPENDIX I. 

 Appended are short descriptions of those species of Pero/10- 

 sporece, undescribed as British in Cooke's Handbook, and in 

 the Mycologia Scotica and its supplements. 

 (All the measurements are in thousandths of a millimetre.) 



