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      Arthropod phylogeny-a modern synthesis*

      Journal of Zoology
      Wiley

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          X.—On the Feeding Mechanism of a Mysid Crustacean, Hemimysis Lamornæ

          The general biology of the Mysids has recently been studied at great length by Blegvad (1922) at Copenhagen. His paper, containing a very complete literature list, deals with Mysis inermis , Rathke, Mysis flexuosa , Müller, and Mysis neglecta , Sars. His comments on feeding are limited, and refer chiefly to the nature of the food that the animals ate in captivity. Gelderd's work (1909) on the digestive system of the Schizopoda describes the course taken by the food through the gastric mill, the masticatory functions of this apparatus, and the method by which the masticated food and digestive juices are brought together, but does not deal with the manner in which the food reaches the stomach. An account, then, of the method by which a mysid collects its food would fill a gap in our knowledge of these forms. The only description, as far as we are aware, of the feeding habits of a mysid is that of Depdolla (1923), who worked on Praunus [ Mysis ] flexuosus , but his account is superficial and in our opinion very inaccurate. The following paper deals with the feeding habits of a small mysid, Hemimysis lamornœ , about 8 mm. long, which has established itself in the larger fish-tanks at the M.B.A. laboratory at Plymouth. It breeds freely all the year round, and can be obtained from the tanks in abundance, although it is stated to be only a rare visitor in the Plymouth district.
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            XV.—On the Feeding Mechanism of Nebalia Bipes

            The object of this research was to compare the feeding mechanism of Nebalia with that of Hemimysis described by Miss Manton and myself (1927). The observations of the living animals were made partly at Naples while I was occupying the Cambridge University table, and partly at Plymouth where I had the use of the London University table. The methods used in determining the feeding currents were the same as those used for Hemimysis (Cannon and Manton, 1927). To obtain a ventral view of the trunk limbs, I simply held the living animal upside down, gripping the abdomen with a pair of forceps, and in this position it would feed for a long time. I found it possible even to remove the entire carapace without killing the animal or upsetting the normal movements of the limbs.
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              II.—On the Feeding Mechanism of Apseudes talpa, and the Evolution of the Peracaridan Feeding Mechanisms.

              The present work on Apseudes talpa forms the second and concluding part of an investigation undertaken in an attempt to discover from feeding mechanisms the steps by which the higher Peracarida may have been derived from a primitive Mysid-like ancestor. The first part of the work consisted of an account of the feeding mechanism of Diastylis bradyi (Dennell, 1934), but it was felt at that time that a discussion of its significance could usefully be postponed until the completion of the work on Apseudes . It is now possible, in view of the accounts of feeding in Hemimysis (Cannon and Manton, 1927), and in Gnathophausia and Lophogaster (Manton, 1928), to discuss with some measure of completeness the feeding mechanism of the Peracarida.
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                Author and article information

                Journal
                Journal of Zoology
                Wiley
                09528369
                14697998
                September 1973
                May 06 2010
                : 171
                : 1
                : 111-130
                Article
                10.1111/j.1469-7998.1973.tb07519.x
                33df72ea-28d2-4800-ac1a-662c0f837816
                © 2010

                http://doi.wiley.com/10.1002/tdm_license_1.1

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