BIBLIOGRAPHY (No. 19).--_Bertolus_, “Mém. sur le development du _Dibothrium latum_” (in Appendix to Duchamp’s work, see Bibliog. No. 59).--_Blanchard_, “Recherches, &c.,” ‘Ann. des Sci. Nat.,’ ser. 3, Zool., Pl. 11, 12, 1848.--_Böttcher_, “Studien ueber den Bau des _Both. latus_,” ‘Virchow’s Archiv,’ s. 97 _et seq_, 1864.--_Bremser_, l. c., Bibl. No. 1, s. 88, 1824.--_Chiaje_, ‘Compendio, &c.,’ Tab. iii, figs. 1-5, 1833.--_Cobbold_, ‘Entoz.,’ p. 289, 1864.--_Idem_, “Remarks on the Broad Tapeworm” (with a letter from Dr Fock), the ‘Veterinarian,’ July, 1878.--_Creplin_, in Ersch and Gruber’s ‘Encyclop.,’ 1839, p. 296.--_Davaine_, ‘Traité,’ l. c., 1860; 2nd edit. (_passim_), 1877.--_Idem_, art. ‘Les Cestoïdes,’ l. c., Bibl. No. 2, p. 580-591, 1876.--_Dujardin_, l. c., Bibl. No. 1, p. 612, 1845.--_Eschricht, D. F._, ‘Anat-physiol. Untersuchungen ueber die Bothriocephalen,’ Breslau, 1840.--_Fock_ (see Cobbold).--_Heller_, ‘Darmschmarotzer,’ l. c., s. 606, 1876.--_Knoch_, ‘Petersburger Med. Zeitschrift,’ 1861.--_Idem_, ‘Die Naturgeschichte des breiten Bandwurms (_B. latus_, auct.),’ St Petersburg, 1862.--_Küchenmeister_, ‘Ueber cestoden,’ l. c., 1853.--_Leuckart_, ‘Die Blasen Bandwürmer,’ 1856.--_Idem_, ‘Die mensch. Par.,’ Bd. i, s. 414-448, und 757, 1863; and Bd. ii, s. 866, 1876.--_Owen_, Todd’s ‘Cyclop.,’ 1837.--_Sömmer_ und _Landois_, aus Sieb. und Köll. Zeitschr., ‘Beiträge zur Anatomie der Plattwürmer,’ Leipsig, 1872; see also the _résumé_ in ‘Nature’ for Aug., 1872, p. 278.--_Wawruch_, ‘Pract. Monograph. d. Bandwürm-Krankheit,’ 1844, s. 33. _Echinococcus hominis_ (the common hydatid).--This larval entozoon has acquired various names according to the kind of bearer in which it happens to have been found; but all the true hydatids or acephalocysts, whether infesting man or animals, are referable to one and the same species of parasite. They have been termed _Echinococcus hominis_, _E. veterinorum_, _E. polymorphus_, _E. exogena_, _E. endogena_, _E. multilocularis_, according to circumstances. All of them represent a juvenile stage of the _Tænia echinococcus_ or hydatid-forming tapeworm which infests the dog and wolf. Experimental proof of this fact has been furnished by Von Siebold (1852), Haubner, Leuckart, Küchenmeister, Van Beneden, Naunyn, Nettleship, Krabbe, and others.