ANATOMY OF PALUDESTRINA 185 



5. Within the Order Taenioglo ssa, Paludestrina is 

 referable to the group which possesses : 



(1) a brevicommissurate visceral commissure ; 



(2) a single otolith ; 



(3) an osphradium with basal ganglion ; 



(4) a renal-portal system and blood-gland ; 



(5) an ' oviducal ' gland immediately adjacent to the 



receptaculum seminis. 



6. Bibliography. 



1. Bernard, F.— ' Bull. Sci. France et Belgique ', xxii, 1890. 



2. ' Ann. Sci. Nat. Zool' (7), ix, 1890. 



3. Bourne, G. C— ' Proc. Zool. See.', 62, 1908. 



4. Boycott, A, E. — ' Journ. Conchology ', xvi, no. 2, 1919. 



5. Bouvier, E.— ' Ann. Sci. Nat., Zool.' (7), iii, 1887. 



6. Bregenzer, Aloys.—' Zool. Jahrb.', 39, Heft 2, 1916. 



7. Edmondson, C. H.— ' Journ. Exp. Zool.', 30, 1920. 



8. Garnault, P. — ' Actes Soc. Linn. Bordeaux ', xli, 1887. 



9. Gwynn Jeffreys, J. — ' British Conchology ', 1, 1862. 



10. Henking, H.— ' Ber. Naturf. Ges. Freiburg', viii, 1894. 



11. Lang, A. — ' Lehrbuch d. Vergl. Anatomie (MoUusca) ', 1900. 



12. Moore, J. E. S.— ' Quart. Journ. Micr. Sci.', 41 (N.S.), 1899. 



13. Moquin Tandon, A. — ' Hist. Nat. Moll. France ', Paris, 1855. 



14. Nelson, T. C— ' Journ. Morphology ', 31, 1918. 



15. Pelseneer, P. — ' Lankester's Treatise on Zoology (MoUusca) ', 1906. 



16. Robson, G. C— ' Ann. Mag. Nat. Hist.' (9), 5, 1920. 



17. Ibid., 6, 1920. 



18. Rougemont, Ph. — ' Etude de la fauna des eaux privees de lumiere ', 



Neuchatel, 1876. 



19. Schitz, V.—' Arch. Zool. Exp.', 59, fasc. 2, 1920. 



20. Seibold, W.— ' Jahreshefte Ver. Vat. Naturk. Wiirtemberg ', 60, 1904. 



21. Simroth, H. — ' Bronn's Klassen und Ordnungen des Thierreichs ', 



Bd. 3, 1902. 



22. Slugocka, M.— ' Revue Suisse Zool.', 21, 1913. 



23. Vayssiere, A.—' Journ. Conchyliol.', 33, 1885. 



24. Woodward, B. B.— ' Ann. Mag. Nat. Hist.', ix, 1892. 



