Studies 



on the 



Ectoparasitic Trematodes of Japan, 



by 

 Seilaro Goto, Ri'iakushi, 



Science College, Imperial University, Tokyo. 



With Plates I-XXVIL 



Introduction. 



It was originally intended that I .should puhlish these studies 

 jointly with Prof. Ijima ; hut as he is engaged on another work, it 

 has become necessary for me to take the whole responsibility upon my- 

 self. The species on which these studies were made were for the most 

 part collected by myself from various parts^^ of Japan during the sum- 

 mers of 1889, '90, '91, and '92. The present part does not include the 

 Gijrodactijlidœ, the study of which I am still prosecuting ; and as this 

 will occupy me for some years longer, I have thought it advisable to 

 publish what is ready now, particularly as I have already been able to 

 make out the general anatomy of some of the G)jrodact)jh'dœ, and can 

 therefore take them into account in judging of the natural affinities 

 of the different species. 



The specimens collected l^y me were usually killed with hot 

 saturated solution of corrosive sublimate. This reau'ent ofives, so far as 

 my experience goes, the best genera] result, fixing the worms usually 

 in an outstretched condition and thus facilitating the process of sec- 



1). The collection was made at the following localities: Hakodate, Misaki, Tokyo, 

 Mitsugahama (in lyo), Ujina (the port of Hiroshima), Hagi, and Mogi (near Nagasaki). 



