THE ANNALS 



AND 



MAGAZLXE OF NATURAL HISTORY. 



[SEVENTH SERIES.] 

 No. 102. JCJ.VR 1906. 



LXVIII. — Some new and little-known Trematodes. Bj 

 William Nicoll, M.A., B.Sc, Gatty Marine Laboratory, 

 8t; Andrews. 



[Plates XII. & XIII.] 



The endoparasitic Trematode fauna of this country is a 

 subject which has of late received but scant attention from 

 zoologists. Since Cobbold's time practically no systematic 

 work of note has been done. Jameson's attempt "^ to solve the 

 much-disputed question of pearl-formation in mussels and 

 other Lamellibranchs is possibly the most important work 

 on the group. 



This contrasts unfavourably with affairs in other countries, 

 where helminthology in general, and particularly that bratich 

 of it relating to Trematoda, has within recent years been 

 receiving very considerable attention. Von Linstow, Braun, 

 Brandes, Liihe, and Muhling in Germany, Stossich and 

 Monticelli in Italy, and Looss in Egypt have devoted the 

 greater part of their time and energy to this de[)artment of 

 zoology. Zschokke and Hausmann in Switzerland and 

 Jiigcrskiold and Odhner in Scandinavia have helped much to 

 increase our knowledge of the bird and fish Trematode 

 parasites of these countries, while in America many workers 

 are engaged in the study of the freshwater-lish parasitic 

 fauna. 



While it is true that, owing to the migratory habits of 



* Proc. Zool. Soc. 1902, i. p. 140. 

 Ann. (& Mag. N, Hist. Ser. 7. Vol. xvii. 35 



