112 PARASITES OP MAN 



is based on two specimens, one of which, quite perfect, was 

 obtained from a child five years old, under Dr FereoPs care 

 at Paris. The other was passed spontaneously by an adult 

 residing at Haute- Saone. I have here copied one of Davaine's 

 original figures of the head of the worm. 



BIBLIOGRAPHY (No. 19). Bertolus, "Mem. sur le development 

 du Dibothrium latum" (in Appendix to Duchamp's work, see 

 Bibliog. No. 59).Blanchard, " Eecherches, &c.," ' Ann. des 

 Sci. Nat./ ser. 3, Zool., PI. 11, 12, 1848. Bottcher, " Studien 

 ueber den Bau des Both, latus," ' Virchow's Archiv/ s. 97 et seq, 

 1864;.Bremser, 1. c., Bibl. No. 1, s. 88, 1824. Chiaje, ' Com- 

 pendio, &c./ Tab. iii, figs. 15, 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, 

 'Traite/ 1. c., 1860; 2nd edit, (passim), , 1877. Idem, art. 

 ' Les Cestoides/ 1. c., Bibl. No. 2, p. 580591, 1876. Dujardin, 

 1. c., Bibl. No. 1, p. 612, 1845. Eschricht, D. P., ' Anat-physiol. 

 Untersuchungen ueber die Bothriocephalen/ Breslau, 1840. 

 Fock (see Cobbold). Heller, 'Darmschmarotzer/ 1. c., s. 606, 

 1876. Knock, ' Petersburger Medi Zeitschrift/ 1861. Idem, 

 ' Die Naturgeschichte des breiten Bandwurms (B. latus, auct.)/ 

 St Petersburg, 1862. Kuchenmeister, ' Ueber cestoden/ 1. c., 

 1853. Leuckart, ' Die Blasen Bandwiirmer/ 1856. Idem, ' Die 

 mensch. Par./ Bd. i, s. 414448, und 757, 1863 ; and Bd. 

 ii, s. 866, 1876. Owen, Todd's ' Cyclop./ 1837. Sdmmer und 

 Landois, aus Sieb. und Koll. Zeitschr., ' Beitrage zur Anato- 

 mic der Plattwiirmer/ Leipsig, 1872 ; see also the resume in 

 'Nature' for Aug., 1872, p. 278. Wawruch, ' Pract. Mono- 

 graph, d. Bandwiirm-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. polijnmr- 

 phus, E. exogena, E. endogena, E. multilocularis, according to 

 circumstances. All of them represent a juvenile stage of the 

 Tcenia echinococcus or hydatid-forrning tapeworm which infests 

 the dog and wolf. Experimental proof of this fact has been 

 furnished by Yon Siebold (1852), Haubner, Leuckart, Kiichen- 

 meister, Van Beneden, Naunyn, Nettleship, Krabbe, and others. 



