Page:Proceedings of the Royal Society of London Vol 7.djvu/301

 Further observations on the genus Anthophorabia. Trans, of Linn. Soc. vol. xxi.

Further observations on the Habits of Monodontomerus. With some account of a new Acarus (Heteropus ventricosus). Trans, of Linn. Soc. vol. xxi.

On the Ocelli in the genus Anthophorabia. Trans, of Linn. Soc. vol. xxi.

On the Reciprocal Relation of the Vital and Physical Forces. Ann. and Mag. Nat. Hist. 1850.

On the Impregnation of the Ovum in the Amphibia. (First Memoir.) Phil. Trans. 1851.

On the Impregnation of the Ovum in the Amphibia. And on the Direct Agency of the Spermatozoon. (Second Memoir.) Phil. Trans. 1853.

On the Impregnation of the Ovum in the Amphibia, and on the early stages of Development of the Embryo. (Third Memoir.) Selected and arranged from the Author's MSS. after his death, by G. V. Ellis, Esq. Phil. Trans. 1854.

These publications, numerous as they are, were all produced within a period of two-and-twenty years. His more important researches were for the most part communicated to the Royal or Linnean Society, and on two different occasions they received the award of the Royal Medal.

His earliest inquiries were directed to the structure and economy of insects and other articulated animals, and his name first became generally known in science by his admirable memoirs on the Anatomy of the Nervous System of the Sphinx Ligustri, and the changes which that system undergoes during the metamorphosis of the insect. Continuing to prosecute these researches in the Crustaceans and other allied invertebrata, he arrived at the conclusion, that in all the higher Articulata, the central part of the nervous system consists of two pairs of cords, the one gangliated, the other not, which, in accordance with the views of Sir Charles Bell, he conceived to minister respectively to sensation and motion.

In a subsequent research on the nervous system of the lulus, he observed in the central cords, a set of fibres which connect together adjacent nerves on the same side of the body, and then extend with them to the surface of the animal. These he regarded as associating in function the lateral nerves of the corresponding side, independently of the brain, in conformity with the views which were at