Botany. 219 



Group 2. Oomycetes. 



CYSTOPUS (ALBUGO) candidus, Lev. Very common on Shepherd's 

 Purse. 



C. (Albugo) tragapogonis, (Pers.), S. F. Gray. Common on goats- 

 beard. 



PHYTOPHTHORA infestans, (Mont.), D.By. Very common on 

 potatoes. 



PERONOSPORA parasitica, (Peis.), Tul. Associated with Cystopus 

 on Shepherd's Purse and other Crucifers. 



SAPROLEGNIA ferax, Kiitz. On goldfish, Avery Hill. 



PYTHIUM de Baryanum, Hesse. The " damping-off " disease on 

 seedlings ; very common. 



P. proliferum, D.By. On dead insects in stagnant water ; very 

 common. 



(Additional Coprophilous Fungi contributed by Rudolf Beer, 

 F.L.S.) :- 



ASCOPHANUS carneus, Boud., var. cuniculi, Boud. On rabbits' 

 dung, Shortlands. 



A. equinus, Mass. On horse-dung, Shortlands. 

 A. immersus, Pers. On horse-dung, Shortlands. 



COEMANSIELLA alabastrina, Sacc. On horse-dung, Cator Estate, 

 Shortlands. This record is an addition to the British Flora. 

 It has only been found twice before, in 1862 in Belgium, and 

 again in France in 1873. Since then it had been loet sight 

 of till the present record. (Journal of Botany, vol. 40, 1902, 

 p. 169). 



PILOBOLUS crystallinus (Wiggers), Tode. On cow-dung, Bickley. 

 SACCOBOLUS neglectus, Boud. Shortlands. 



STILBELLA erythrocephala (Ditm.), Lindau. On rabbits' dung, 

 Cator Estate, Shortlands. 



STYSANUS stemonites (Pers.), Corda. On horse-dung, Shortlands. 



MYXOMYCETES. 

 (Mycetozoa, or Slime-Fungi). 

 ARCYRIA albida, Pers. Bickley. R. Beer. 

 A. ferruginea, Sauter. On dead wood, Eltham. L.C.C. 



A. incarnata, Pers. Orpington. R. Beer. 

 BADHAMIA macrocarpa, Rost. Bickley. R. Beer. 



B. utrieularis, Berk. On woody fungi, dead wood ; common. 



