88 CH. WARDELL STILES AND ALBERT HASSALL 



genus was clearly defined and named by Rudolphi (1809) and was 

 adopted by de Blainville (1828). As genus it bas been accepted by de 

 Blainville (1828), Cobbold (1860), Stossich (1892), Monticelli (1893), 

 Looss (1896), Railliet (1898), Hassall (1896), and others. As subge- 

 nus it bas been accepted by Dujardin (1845), Braun, Railliet (1893) 

 and otbers. 



De Blainville (1828) as tirst reviser mentioned only two species : 

 E. echinatum and E. ferox, and Hassall (1896) designated the former 

 as type. 



Echinostomum see Echinostoma. 



Eurycœlum see Hemiurus. 



Eurysoma Dujardin, 1845, subg. — Type, Distoma squamula 

 Rudolpbi, 1819. 



1845, Distoma (Eurysoma) Dujardin [nec (1) Eurysoma GisÛ., 

 1829 ; nec Kocb, 1840 ; nec Eurysomus Young 1866], Histoire nat. des 

 helminthes, pp. 387, 388, 406. Only and hence type species, Distoma 

 squamula Ruào\])h\, 1819. 



This subgenus bas not been adopted by modem helmintbologists. 

 A parasite bas recently been found by Hassall wbich is either Di- 

 stoma squam,ula or a closely allied new^ species, and judging from the 

 topography of the génital organs we are rather inclined to believe 

 iYidil Eurysoma will eventually prove to be a subdivision of Campula. 

 By the law^ of homonyms Dujardin's name Eurysoma must be rejec- 

 ted, but we refrain from proposing a new term because of the 

 uneertainty of the validity of the group. 



Fasciola Linnaeus, 1758. — Type, Fasciola hepatica Linnaeus, 

 1758. 



1758, Fasdola Linnaeus, Systema naturae, 10 éd., pp. 644, 648. 

 Typeby élimination and définition F. hepatica Linnaeus, 1758. 



il82,Planaria Ciôze [nec (2) Muller, 1776 ; necBrown, 1827 ; nec 



Lea, 1833], Versuch Naturg. Eingeweidew., p. 168. Includes Fasciola 



hepatica as Planaria latiuscula, hence type, P. latiuscula Goze, 1782. 



(1782), Distoma Retzius [nec (3) Distomus Gartner, 1774 ; nec 



(1) Eurysoma Gistl., 1829, Coleoptoron ; Eunjanma Koch, 1840, Arachnoid ; 

 Eurysomus Young, ISGG, Fish. 



(2) Planaria Mûller, 1776, Worm ; Plànaria Brown, 1827, Mollusk ; Planaria 

 Lea, 1833, Mollusk. 



(3) DUlomus Gartner, 177i, Mollusk; Distomus Steph., 1827, Colcopteron ; 

 Distoma Sav., 1816, Mollusk, 



