Zoological Society. 501 
F.L.S., giving an account of a double variety of the Field Scabious, 
Scabiosa arvensis, L. (Knautia arvensis, Coult.), a specimen of which 
he presented to the Society. The specimen was gathered in a 
stubble-field at Norton in the county of Durham on the 29th of 
September, and was the only one seen with a double flower, all the 
other plants in the field presenting the ordinary flower of the species. 
The doubling consists in the enlargement of the inner florets to the 
same size as the outer ones in the ordinary flowers; but the anthers 
and stamina of the former do not appear to have become abortive as 
in the outer enlarged florets, and as might have been expected from 
the similar change in the corolla. In Hooker’s ‘ British Flora,’ the 
species is characterized by the corolla of its outer florets having 
unequal and of its inner florets equal segments: in this double 
variety the segments of the inner florets are unequal like those of 
the outer. 
Mr. Westwood, F.L.S., exhibited a small branch of a Nelis d’hiver 
pear grown against a wall in the garden of Mr. Wilmot, Isleworth, 
covered with a great number of large, solid, woody, gall-like protu- 
berances caused by the punctures of a species of Aphis closely allied 
to the American blight, the twigs in this branch having been com- 
pletely stunted in their growth, and not exceeding an inch in length, 
the energy of the tree having been concentrated in the growth of the 
protuberances. Mr. Westwood pointed out the difference between the 
real galls (sometimes quite hard and woody in their texture) caused 
by the punctures of insects and the deposition of eggs, and these 
pseudo-galls which did not enclose eggs, but were the result of 
the punctures of the proboscis of insects for obtaining an immediate 
supply of food. The latter are of great rarity, and Mr. Westwood 
had never seen any which could be compared in extent to the speci- 
men exhibited, which was moreover covered with a whitish powder 
discharged from the bodies of the Aphides, and with a great number 
of the skins shed by them during their transformations. 
Read a further continuation of Mr. Huxley’s Memoir ‘On the 
Anatomy of the Diphyde,” &c. 
ZOOLOGICAL SOCIETY. 
May 22, 1849.—Harpur Gamble, Esq., M.D., in the Chair. 
On THE BRITISH SPECIMENS OF ReGatecus. By J. E. Gray, 
Esa., F.R.S. &e. 
The occurrence of a specimen of Regalecus on the coast of North- 
umberland, which is now being exhibited in Regent-street, has in- 
duced me to communicate the following remarks which I have col- 
lected connected with the history of its former occurrence in this 
country, some of which appear to have escaped the researches of our 
British naturalists. 
Though the materials here referred to are mentioned by M. Valen- 
ciennes in the tenth volume of the ‘ Histoire des Poissons,’ the refer- 
