730 TRANSACTIONS OF SECTION K. 



animal remains were found which had been in a state of putrefaction when 

 engulfed. Remains were found of three kinds of bacteria : 



a. Bacillus I. (Gault). Average width ^ jtt. Length from 1^ ja to 100. 



h. Bacill-us II. (Gault). Average width 1 ;ii. Length on the average 5'7 

 Rods had well-defined membranes and rounded ends. 



c. Micrococcus I. (Gault). Uni- and Diplo-cocci in various stages of cell- 

 division. Showed thicker outer walls and thinner transverse membranes. The 

 diameter of the cocci measured 2|-2| yu. In some cases remains of cell-contents 

 were observed. 



8. On Spore Discliarge in ihe IJredinea; and Hymenomycetes. 

 By Professor A. H. Eeginald Buller. 



Throughout the Uredinefe and Hymenomycetes the spores produced upon the 

 basidia are violently discharged. 



In both groups, just before the discharge of a basidiospore, a drop of fluid 

 is excreted where the spore is attached to the sterigma. The drop varies in 

 size, according to the species, from one-third to one whole diameter of the 

 spore. On discharge the drop is carried with the spore. Sometimes the drops 

 become abnormally large, and then discharge may not take place. 



In many Uredineje the basidia are curved and the sterigmata are then placed 

 on the outer convex side of the basidium. This causes the basidiospores to be 

 directed toward an open space, with the result that, when discharge takes place, 

 the spores are shot away so that they escape into free air. 



9. Fruits and Seeds. By Professor F. W. Oliver, F.R.S. 



10. Stomala on Hypogeal Cotyledons. By Miss E. M. Blackwell. 



11. The Mush (Mimulus moschatus L.) in Scolland. 



By WlI,LIAM WiTiSON. 



In 1911 I found the musk (Mimulus moschatus L.) growing in Haughton 

 Wood, Alford, in a low, cold habitat (400 feet). In 1914 I found it beside a 

 well, Glack Culmellie, Cushnie, at an altitude of about 1,200 feet. Possibly 

 these are the coldest stations known for the plant. It is also recorded as 

 growing occasionally in Perthshire on river shingles ; and there are two records 

 for Banffshire. Thus this garden plant is gradually extending its range, and 

 competing with the really native members of the British flora. 



12. The Life History and Cytology of Tuburcinia primulicola Bostnip. 



By Dr. M. Wilson. 



The conidial stage of Tuburcinia primulicola (known as Pcepalopsis 

 Irmischice Kiihn) was discovered by Kiihn in Halle, Germany, in 1883, on 

 several species of Primula, and it appears that no subsequent record of its 

 occurrence has been made. 



This stage of the fungus has recently been found in two localities in Kent 

 on Primula vulgaris. The fungus apparently persists in the host-plant during 

 the winter. The mycelium is intercellular, producing haustoria of the type 

 usually found in the Ustilagineas ; in the spring it may be found in the peduncle, 

 calyx, corolla, stamens and ovary, usually in the peripheral tissues of these 

 organs. The mycelium is septate with uninucleate cells ; the nuclei are small 

 with one deeply-staining nucleolus. In the young flowers the mycelium is 

 particularly abundant in the lower part of the corolla tube, on the dorsal sur- 

 faces of the anthers and in the ovary between the ovules. In these places it 

 becomes superficial and gives rise to large numbers of small unicellular 

 uninucleate conidia. The conidia in the open flower are seen as meal-like 



