10 
REPORT OF THE 
Some additions of great interest have been made to the 
collection of British Mollusca, through the British Natural 
History Society; of these the most important are the Egg- 
capsules containing young of the rare Shells, Fusus Turtonis 
and Fusus Norvegicus, the possession of which illustrates an 
important fact in the Natural History of the Mollusca, namely, 
that species which present a very near approximation in the 
characters of the animal and shell may yet shew essential 
differences in the structure of the ova; and hence it w 7 ould seem 
that a better acquaintance with the ova of the Mollusca may 
render important aid to the Naturalist in the determination of 
problems relating to the discrimination between species and 
varieties, in the numerous forms of this important division of the 
animal kingdom. Through the same channel a fine example of 
a very rare shell, Natica pusilla, from Staithes fishing boats, has 
been added to the collection, and a specimen of Emarginula 
crassa from Anglesea. In British Zoophytes the Society is 
indebted to Mr. Leckenby, of Scarbro 5 , for a series of choice 
specimens of some of the rare species from the Coast. 
The Council regret that the office of Curator of Botany still 
remains vacant; but they trust that before long some member 
of the Society will undertake the charge of this important part 
of its Collections. A Supplement to the “ Flora of Yorkshire,” 
by the Sub-Curator of the Museum, has lately been published. 
The materials have been chiefly furnished to Mr. Baines by 
two able co-adjutors, Mr. John Gilbert Baker and Mr. Nowell, 
the former of whom has contributed an account of the Flowering; 
Plants and Ferns, and the latter of the Mosses. The Hepaticse, 
Lichens, Algse and Fungi of the county have not yet been 
sufficiently studied to enable the botanist to exhibit a catalogue 
of them; but, as far as it goes, the “ Flora of Yorkshire” may be 
received w T ith confidence, as a full and exact enumeration of 
the productions of this varied and extensive district. To Mr. 
Baker the Society is indebted for arranging its British Lichens 
in a form which at once facilitates the use and displays the 
beauty of the Collection. 
Of the additions which have been made during the last year 
to the Antiquarian department of the Museum, the most 
