Abstract
LONDON
Linnean Society, June 17.—Dr. G. J. Allman, F.R.S., president, in the chair.—Mr. J. E. Howard, F.R.S., made some observations on Cinchona anglica, a hybrid between C. Calisaya and C. succirubra.—Dr. Pryor exhibited specimens of Myrsine Urvillei, from New Zealand, which appeared to be hardy in this country.—The following papers were read:—I. On the affinities and febrifuge properties of the Aristolochiacese, by Mr. Clark. — 2. On Whitfieldia, by Mr. S. Moore.—3. On the anatomy of Amphioxus, by Prof. E. R. Lankester, F.R.S. The author described the anatomy of A. lanceolatus as worked out in a series of sections made from numerous specimens collected by him at Naples. In opposition to S tied a, the truly perforate structure of the pharynx was asserted. A true body cavity or coelom, distinct from the atrial chamber, was described, and it was shown to expand and attain a large development in the post-atrioporal region of the body. A pair of pigmented canals were described, apparently representing the vertebrate renal organ in a degenerate or else a rudimentary condition. Johannes Midler's pores of the lateral canals were shown to be hyoid slits leading into the pharynx. The attachment of the pharyngeal bars to the wall of the atrium by a series of pharyngo-pleural septa was minutely described. It was further shown that the marginal ridges of the ventral surface (metapleura) are hollow, containing a lymph-space, and that they, as well as the plates of the ventral integuments, disappear when the atrial chamber is largely distended with the sexual products. Drawings by Mr. W. J. Fanning, of Exeter College, were exhibited in illustration of the above statements.
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Societies and Academies . Nature 12, 179–180 (1875). https://doi.org/10.1038/012179a0
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DOI: https://doi.org/10.1038/012179a0