134: REPORT—1874. 
On Structural Peculiarities of the Ampelidee. By Professor Lawson, Jf.A. 
On a Monstrous State of Megacarpea. By Dr. Moors, 
On a Monstrous Flower of Sarracenia. By Dr. Moors. 
On Grafted Roots of Mangold-Wurzl. By Dr. Moors. 
On the Growth of the Stems of Tree Ferns. By Dr. Moors. 
Mosses of the North-east of Ireland. By 8, A. Stewart. 
Turner in 1804 enumerated as Irish 230 species of mosses, Dr. Taylor in 1836 
mentions about the same number, and Dr. David Moore in 1872 gives a list of 385 
Trish species, to which the author of the present paper adds four others, making 
389, or more than two thirds of the British mosses. Thus, relatively to the 
British flora, Ireland has quite as large a proportion of mosses as she has of flower- 
ing plants, proving that Irish miscology has not been neglected. No separate lists 
of the mosses occurring in the northern counties have been published; but after 
consulting the records of Dr. Taylor in the ‘ Flora Hibernica,’ and the valuable list 
of Irish mosses by Dr. Moore, also some detached papers on the subject and his 
own unpublished notes, the author ascertains that the number of species occurring 
in the district amounts to 225, or more than one half of the Irish mosses. The 
district is defined to consist of the counties of Down and Antrim, with a small 
portion of county Derry bordering on Antrim. The list includes a number of rare . 
mosses. The following have not been previously recorded as Irish :—Fissedens 
incurvis, Schw., var. Lyle’, found only on a greensand rock on the Black Mountain, 
near Belfast; Tayloria serrata, in small quantity near the summit of Benbradagh 
Mountain, county Derry ; Mnium subglobosum, in wet peat-bog on Cave Hill, near 
Belfast, and in a similar habitat on Carrickfergus commons; Seligeria calcarea, on 
Black Mountain, near Belfast, appearing like little black specks on small lumps of 
chalk in the grass. Mr. C. P. Hobkirk, of Huddersfield, has been kind enough to 
identify the specimens of the above-named mosses. 
On the Potato-Disease. By Jamus Torpirt. 
The author believes that the potato cannot be propagated for ever from the “set,” 
that it dies of old age in about thirty years after it is grown from a seed, that to 
eradicate the disease it must be grown from the seed, and it must be planted 
beyond the range of infection emitted by old infected varieties. The author 
believes that the range of infection does not extend beyond a few hundred yards. 
On Specimens of Marine Alqe from Jersey. 
By C. J. B. Witt1ams, M.D., F.RS. 
These specimens were prepared by Miss E. Dyke Poore, who had found as many 
as 230 species on the shores of Jersey. This remarkable abundance and variety 
of seaweeds, as well as their luxuriant growth, Dr. Williams attributed partly to 
the position of the Channel Islands, receiving tides and currents from the great 
Atlantic as well as the channel ; and partly to the remarkable clearness and purity 
of the sea-water as contrasted with that of the muddy shores of the southern and 
eastern coasts, due to the chalk, marl, and sand of their shores, whereas those of 
