_Ascaris texana_, Smith et Goeth, 1914 465 _Ascaris maritima_, Leuckart, 1876 465 Genus. _Toxascaris_, Leiper, 1907 465 _Toxascaris limbata_, Railliet and Henry, 1911 466 Genus. _Belascaris_, Leiper, 1907 466 _Belascaris cati_, Schrank, 1788 466 _Belascaris marginata_, Rudolphi, 1802 466 Genus. _Lagocheilascaris_, Leiper, 1909 466 _Lagocheilascaris minor_, Leiper, 1909 467 Family. _Oxyuridæ_ 467 Genus. _Oxyuris_, Rudolphi, 1803 467 _Oxyuris vermicularis_, Linnæus, 1767 467 Family. _Mermithidæ_ 469 Genus. _Mermis_, Dujardin, 1845 469 _Mermis hominis oris_, Leidy, 1850 469 _Agamomermis_, Stiles, 1903 470 _Agamomermis restiformis_, Leidy, 1880 470 TECHNIQUE 471 *D. Acanthocephala*, Rud 475 _Echinorhynchus gigas_, Goeze, 1782 477 _Echinorhynchus hominis_, Lambl, 1859 478 _Echinorhynchus moniliformis_, Bremser, 1819 478 *E. Gordiidæ* 479 *F. Hirudinea s. Discophora* (Leech) 480 Family. _Gnathobdellidæ_ (Leeches with Jaws) 481 Genus. _Hirudo_, L., 1758 481 _Hirudo medicinalis_, L., 1758 481 _Hirudo troctina,_ Johnston, 1816 482 Genus. _Limnatis_, Moq.-Tandon, 1826 482 _Limnatis nilotica_, Savigny, 1820 482 Genus. _Hæmadipsa_, Tennent, 1861 482 Family. _Rhynchobdellidæ_ (Leeches with Rostrum) 482 Genus. _Hæmentaria_, de Filippi, 1849 482 _Hæmentaria officinalis_, de Filippi 482 Genus. _Placobdella_, R. Blanchard 482 _Placobdella catenigera_, Moq.-Tandon 482