DE. T. S. COBBOLD'S SYNOPSIS OF THE DISTOMIDJB. 43 



embryonic condition by Wagener in the liver and orbits of the same 

 fish in July. 



8. MONOSTOMA GALEATUM, Rudolphi. 



M. galeatum, Rudolphi, Dujardin, Diesing. 



Hab. Found by Rudolphi in the intestines of Lichia glauca in August. 



9. MoNOSTOMA ECHINOSTOMUM, Dicsiug. 



Distoma planicolle, Rudolphi, Dujardin. 



Hab. Found by Natterer in Catkartes Aura in February, and in the 

 intestines of Sula fusca, in Brazil. 



10. MoNOSTOMA CARYOPHYLLINUM, Zeder, 



M. caryophyllinum, Zeder, Rudolphi, Bremser, Gurlt, Creplin, Dujardin, 



Diesing (species inquirendse), Cobbold (Linn. Trans.). 

 Hypostoma caryophyllinus, Blainville. 

 Festucaria caryophyllina, Rudolphi. 

 Hab. Found by Rudolphi and myself in Gasterosteus aculeatus. 



11. MoNOSTOMA Braunii, Cobbold. 

 M. MurcenultB, Rudolphi, Diesing. 



Hab. Discovered by Braun in follicles attached to the stomach of Core- 

 gonus Murcenula. 



12. MoNOSTOMA COCHLEARIFORME, Rudolphi. 



M. cochleariforme, Rudolphi, Dujardin, Diesing. 



Hab. Found by Schrank in the intestines of Barbus communis. 



13. MoNOSTOMA Wedlii, Cobbold. 



M. Rhombi IcBvis, Wedl (non descript.) ; Diesing, Revis. p. 25 (species 



inquirendse). 

 Hab. Found by Wedl in follicles of the intestinal mucous membrane, 



and also adhering to the fin-rays of Rhombus lasvis. 



14. MoNOSTOMA GRACILE, Rudolplli. 



M. gracile, Rudolphi, Dujardin, Diesing (species inquirendse). 



Hab. Found by Acharius in the abdominal cavity of Osmerus Eperlanus. 



15. MoNOSTOMA DUBiUM, Cobbold. 



Corpus planum, oblongum, antrorsum attenuatum, retrorsum truncatum. 



Os subterminale, orbiculare exiguum. Penis longus filiformis, apice 



bifurcatus. Longit. ^V unc. 

 M. duhium, Cobbold, Linn. Trans, vol. xxii. pt. 3, p. 256. tab. 31, 



figs. 4 & 5. 

 Hab. Found in a cyst attached to the subperitoneal surface of the ovary 



of Gasterosteus Spinachia. 



Genus 11. Nematobotheium. (Van Beneden.) 



1. Nematobothrium filarina, Van Beneden. 



Corpus planum, cylindricum, filiformc, in nodum collectum, antice nunc 



diverse acuminatum, tunc rotundatum, postice obtusatum. Longi- 



tudo ad 40 unc. ; crassities i unc. 



