872 rerort—1890. 
4, A hillside; 3 and 4 constituting the Park proper. 
The whole is divided into the thirteen areas already referred to. The combina- 
tion of soil, temperature, and moisture at this place was shown to be well suited 
to a marked variety in plant life, as well as to produce very luxuriant forms, in 
striking contrast to plants of the same species a few miles from the Park. 
12. The Cytology of the Chytridian Woronina. 
By Professor Marcus M. Hartoc, M.A., D.Sc., F.L.S. 
This parasite of Achlyr has no microsomes. There is some evidence that spore 
formation is not merely due to the separation of the contents of the sporange into 
cells; but each of the many nuclei of the sporange divides first, so that twice as 
many spores are formed as there were nuclei in the young sporange. 
The discharging process is pushed out and formed by one of these nucleated 
young spores which afterward degenerates completely. 
13. On the Acclimatisation of the Tussock Grass of the Falkland Islands. 
By Professor Marcus M. Harroe, M.A., D.Se., F.L.S. 
This is noble grass, of the habit of the Pampas grass, and most valuable as fodder ; 
will grow in bog land and close to the sea. It had been acclimatised many years 
ago in the Lewis, but appears to be failing there owing to the unchecked browsing 
of cattle. In introducing this plant into Ireland, in the spring of 1889, the author 
aimed at raising a limited number of plants from seed, growing them sufficiently 
wide to ensure good individual development, and increasing his supply of nursery 
plants by dividing them from time to time into sets. He anticipates that in a few 
years these plants will be propagated by sets from full-sized plants just like the 
Pampas grass, and suitable directly for planting out on farms. The plant does well 
at Cork; and at Dunmanway, in the west of the county, plants raised from seed in 
spring and planted out in May had in the autumn formed tussocks of eighty or 
more stems, each as thick as the finger at the base, and seeded, though not very — 
freely. 
14. On a Case of Apogamy in Vaucheria hamata (Vauch.) Lyngb. 
By Tuomas Hick, B.A., B.Sc. 
The sexual reproductive organs—oogonia and antheridia—of this species of 
Vaucheria are found on short lateral branches of the thallus, both being found on | 
the same branch. In the normal development of the oogonium, the apical growth 
is arrested, and an obliquely ovoid dilation is formed ; oil, chlorophyll corpuscles, 
protoplasm, &c. are accumulated im this dilated part, which is finally cut off from 
the rest of the branch by a transverse partition. In the case of apogamy to which 
attention was drawn, all the steps in the development of the oogonium save the 
earliest were suppressed. The lateral branch ceased to grow at the apex, and the 
obliquely ovoid swelling occurred in the normal fashion, but there followed no 
ageregation of the cell contents and no formation of a transverse partition, After 
the rudimentary oogonium had reached the stage indicated, the apex resumed its” 
normal growth, and grew out vegetatively into an ordinary branch of the thallus. 
This abnormal mode of development was met with in several instances, but it did 
not wholly replace the normal one. The form and the development of the antheridia | 
were quite normal, even on the branches which bore the abnormal oogonia. 
15. An overlooked variety of Cynosurus cristatus (Crested Dog’s-tail-grass) 
By W. Witson, Jun. ; 
__ The attention of the writer has been directed for some years to what he con= 
siders a variety of the above grass, which form is to be found growing occasional 
