32 DR. T. s. cobbold's synopsis of the distomid^. 



to associate these species in a separate sub-genus under the above 

 title, which I have retained. 



1. Crossodera nodulosa, Dujardin. 



Distoma nodulosum, Zeder, Rudolphi, Bremser, CrepHn, Mehlis, Siebold, 

 Dujardin, Moulinie, Wagener, Diesing, Revis. p. 39. 



D. Luciopercce, Zeder (fortasse), FiUppi. 



D. Planorhis carinati. 



Fasciola nodulosa, Froelich. 



F. Luciopercce, Miiller, Gmelin. 



F. Perc(B cernua, Miiller. 



F. percina, Schrank. 

 In statu larvae. 



F. Cercariceni (Planorbis) carinati (fortasse), Diesing. 



Hab. Found by Rudolphi and Dujardin in Perca fluviatilis ; by Zeder 

 and Zoega in Acerina vulgaris; by Schrank in Aspro vulgaris; it has 

 also been observed in A. Zingel; in Leioperca Sandra by Rudolphi ; 

 in Esox lucius by Creplin ; by Dujardin in Barbus communis. 



2. Crossodera campanula, Dujardin. 

 Distoma campanula, Dujardin, Wedl, Diesing. 

 D. nodulosum (partim), Diesing. 



Hab. Found by Dujardin and Wedl in the intestines of Esox Indus. 



3. Crossodera laureata, Dujardin. 



Distoma laureatum, Zeder, Rudolphi, Dujardin, Diesing. 



Fasciola laureata, Rudolphi. 



F. Farionis, O. F. Miiller, Froelich. 



F. TruttcB, Froelich. 



Hab. Found by Zeder and Froelich in Sahno Trutta ; by Rudoljihi and 



Froelich in S. Fario ; it has also been observed in S. Umbla and 



Thymallus vexillifer. 



4. Crossodera papillosa, Cobbold. 

 Distoma Beroes, Will. 



D. papillosum, Diesing. 



Hab. Discovered by Will in the water-vessels of Bero'e rufescens. 



5. Crossodera linearis, Cobbold. 



Distoma lineare, Zeder, Rudolphi, Dujardin, Diesing. 

 Fasciola linearis, Rudolphi. 



Hab. Found by Rudolphi in the lai'ge intestine of the domestic Cock, 

 Phasianus Gallus. 



Genus 7. Echinostoma. {Cobbold.) 

 I entertain no doubt as to the propriety of elevating Dujardiu's sub- 

 genus Echinostoma into a sepai'ate genus. The remarkable form of 

 the anterior sucker, and the accompanying double series of marginal 

 spines, associated with the conspicuous dermal spicules, are sufficiently 

 characteristic. 



