70 BUfcEAU OF ANIMAL INDUSTRY. 



The cases of absolute homonyms (namely, absolutely identical com- 

 binations of the same letters) found in roundworm generic names may 

 be seen from the following tables: 



Roundworm 1 generic names which are absolutely preoccupied. 



Roundworm genus. Preoccupied as follows. 



Acanthophorus Linstow, 1876 Serv., 1832, coleopteron. 



Acanthosoma Mayer, 1844 Curt., 1824, hemipteron; DeK., 1842, fish. 



Arhynchm Shipley, 1896 Dejean, 1834, coleopteron. 



Aspidocephalus Diesing, 1851 Motsch, 1839, coleopteron. 



Brachynema Cobb/1893 Fieb., 1861, hemipteron. 



Cephalacanthus Diesing, 1853 Lac., 1802, fish. 



Cephalonema Cobb, 1893. Stimps. , ante 1882, worm. 



Chtetosoma Claparede, 1863 Westwood, 1851 , coleopteron. 



Cheiracanthus Diesing, 1838 Agassiz, 1833, fish. 



Cochins Zeder, 1803 Humph., 1797, mollusk. 



Conocephalus Diesing, 1861 Thunb., 1812, orthopteron; Zenk., 1833, 



crustacean; Schrenh., 1838, coleop- 

 teron; Dum., 1853, reptile. 



Cystocephalus Railliet, 1895 Leger, 1892. 



Diceras Rudolphi, 1810 Lamarck, 1805, inollusk. 



Dipeltis Cobb, 1891 Packard, 1885, crustacean. 



Discophora Villot, 1875 Boisduval, 1836, lepidopteron. 



Eucamptus Dujardin, 1845 Chevr., 1833, coleopteron; Dej., 1833, 



coleopteron. 

 Eurystoma Marion, 1870 Rafinesque, 1818, mollusk; Kcell., 1853, 



coleopteron. 

 Fimbria Cobb, 1894 Bohadsch, 1761, mollusk; Meg., 1811, 



mollusk; Risso, 1826, mollusk. 

 Hoplocephalus Linstow, 1898 Hoplocephalus Cuvier, 1829, reptile; 



Oplocephalus for Hoplocephctlus. 



Leptoderes Dujardin, 1845 Serv., 1839, orthopteron. 



Litosoma van Beneden, 1873 Douglas & Scott, 1865, hemipteron. 



Mitrephorus Linstow, 1877 Schoenherr, 1837, coleopteron; Sclater, 



1859, bird. 

 Xeorhynckus Hamann, 1892 Sclater, 1869, bird; Milne-Edwards, 1879, 



crustacean. 

 Oxysoma Schneider, 1866 Gervais, 1849, arachnoid ; Kraatz, 1865, 



coleopteron. 



Oxystoma Buetschli, 1874 Dumeril, 1806, coleopteron. 



Oxyurus Lamarck, 1816 Rafinesque, 1810, fish; Swains. , 1827, 



bird. 



Paradoxites Lindemann, 1865 Goldf., 1843, crustacean. 



Paragordius Montgomery, 1898 equals Paragordius Camerano, 1897. 



Pelodytes Schneider, 1860 Fitz. , ante 1846, or Gistl. , 1848, reptile. 



Pterocephalus Linstow, 1899 Schneider, 1887, protozoon. 



Ptychocephalus Diesing, 1861 Agassiz, 1843, fish. 



Rhabdogaster Metechnikoff, 1867 Loew., 1858, dipteron. 



Rhabdonema Leuckart, 1883. . . t Kuetzing, 1844, polygastrica. 



Rhabdvnerna Perroncito, 1886 Leuckart, 1883, nematode; Kuetzing, 



1844, polygastrica. 



1 See also p. 11 for explanation of insertion of other than nematode genera. 



