STUDIES OX THE ECTOPARASTTIC TEEMATODES OF JAPAN. 259 



long ; anterior suckers elliptical ; posterior 



sucker with a pair of notches on its anterior 



and posterior borders E. ovata. p. 235. 



*- Internal surface of the posterior sucker divided 



into a central and seven peripheral areas TEISTOMUM. p. 288. 



§iBody broadly ovate, about 8 mm. by 7 



mm.; anterior border concave, lateral 



margin finely sinuate, with about 58 



chitinous corpuscles ; posterior sucker 



small, not reaching the posterior end of 



the body proper, with the central area 



regularly heptagonal and with a small 



triangular accessory area on each side of 



the hindmost peripheral area T. sinuatum. p. 289. 



§2 Body broadly oval, about 13 mm. by 12 



mm. or larger; anterior border convex; 



lateral margin entire, without any 



chitinous corpuscle ; posterior sucker 



large, with a diameter equal to about i 



the length of the body proper and pro- 

 jecting beyond it by one-third of its 



diameter, with the central area 9-sided... T. ovale, p. 241. 

 §'Body oval, about 11.5 mm. by 13 mm., 



with the breadth greater than the length ; 



anterior border concave ; lateral margin 



entire, with numerous transverse series 



of chitinous corpuscles, each series con- 

 sisting at most of five corpuscles ; posterior 



sucker small, barely reaching the posterior 



end of the body proper ; with the central 



area regularly heptagonal and raised a 



little above the peripheral areas T. rotmidum. p. 245. 



§■• Body elongated and slightly ovate, about 



G mm. by 3 mm.; anterior border 

 -shaped; lateral margin entire and 



