484 PABASITES OF ANIMALS 



the Gammari and their allies. The well-known Udonclla caligorum 

 attaches itself to Crustacea that are themselves parasitic. 



As many of the so-called free nematodes live in the slime 

 of animals, Villot is of opinion that no very distinct line of 

 demarcation can fairly be drawn between the parasitic and 

 free species. This work, however, having dealt only with 

 genuine parasites, I have purposely omitted any detailed account 

 of the so-called free nematoids. I mention this lest it should 

 be supposed that I had shown a studied neglect of the more or 

 less remarkable labours of Biitschli, Bastian, Eberth, Linstow, 

 Marion, Villot, Glaus, De Man, Carter, and many others. 



BIBLIOGRAPHY (No. 60). Bastian, H. C., "Monograph on 

 the Anguillulidae, or free Nematoids, marine, land, and fresh- 

 water, with description of 100 new species/' ' Linnean Trans/ 

 for 1865, vol. xxv, p. 73. Idem (see Bibliog. No. 2). Linn, 

 " Free Nematoids," being an article in the { Popular Science 

 Review' for 1868, vol. vii, p. 163. Brady, 0. S., ' Monograph 

 of the free and semi parasitic Copepoda/ London, 1878. 

 Butschli, 0., " Untersuchungen ueber freilebende Nematoden 

 und die Gattung Chaetonotus," ( Sieb. und Koll. Zeitschrift/ 

 1876. Carter, H. J., " On a Bisexual Nematoid Worm which 

 infests the common House-fly (Musca domestica)," ' Ann. Nat. 

 Hist./ 1861, and in the 'Bombay Med. and Phys. Soc. Trans./ 

 new series, 1860. Claparede (see Panceri). Glaus, C., ' Beo- 

 bachtungen ueber d. Organis. und Fortpflanz. v. Leptodera 

 appendiculata,' 1869. Cobbold, " Note on Insect Parasites/' in 

 ' Rep. of Entomological Club/ in the ' Midland Naturalist/ 

 March, 1878, p. 80. Cole, W., " Remarks on a Parasite of 

 Humble Bees/' in ' Journal of the Quekett Microscopical 

 Club/ 1875. Dufour, L., " Sphserularia," < Ann. des Sci. Nat./ 

 1836. Dujardin, " On Mermis," ' Ann. des Sci. Nat./ 2e ser., 

 torn. 18, p. 129. Eberth (see Bibliog. No. 2). Garner, R., 

 " Note on a Distoma," in his paper ' On the Lamellibranchiate 

 -Conchifera/ ' Trans. Zool. Soc./ 1841. Ghaleb, 0., "Observa- 

 tions and Experiments on the Migrations of Filaria rhyti- 

 pleurites, a Parasite of Cockroaches and Rats," ' Comptes 

 Rendus/ July 8, 1878, and ' Ann. Nat. Hist./ Aug., 1878. 

 Idem, " Note sur 1'anat. et les migrations de deux Nematoides 

 parasites, le Poecilogaster blatticola et Fil. rhytipl.," Paris, 1876 

 (quoted by 0. von Linstow). Giard, M. A., " On the parasitic 

 Isopoda of the genus Entoniscus (infesting Crustacea)," from 

 'Comptes Rendus/ Aug., 1878, in 'Ann. Nat. Hist,/ Otc., 



