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 difl'erence 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 Diphj/dce," &c. ZOOLOGICAL SOCIETY. May 22, 1849.— Harpur Gamble, Esq., M.D., in the Chair. On the British specimens of Regalecus. By J. E. Gray, Esq., F.R.S. &c. 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-
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