258 s. GOTO. 



pheral areas ; with a pair of hooks in the sides of the 



■ hindmost peripheral area ... CALICOTYLE, p. 226. 



*^Body very flat, ovate, about 8 mm. by 5 mm.; 

 posterior sucker sessile, with a diameter equal 

 to about J the total length of the body ; with 

 two pairs of sac-like sticky glands opening by 

 means of long necks at the anterior end of the 

 body; tubular chitinous penis very long and 

 twice bent on itself; hooks about 0.56 mm. 



long C. Mitsukurii. p. 227. 



t'Body always symmetrical, without any anterior 

 sucker, but with a large, circular posterior sucker, 

 the internal surface of which is divided by eight 

 radial spokes into as many equal secants ; two of the 

 posterior radial spokes on either side of the median 

 line each with a strong hook ; with two pairs of 



ocular spots in front of the pharynx MONOCOTYLE. p. 230. 



"■1 Body elongated, flattened, about 3 mm. long ; 

 mouth sub-terminal, large ; sucker sub-basilar ; 

 hooks strongly recurved at the end but straight 

 in the remaining portion, and with a barb-like 

 process near the recurved end ; about 0.12 mm. 



long M. Ijimae. p. 230. 



t^Body flat, oval, ovate, or circular; with a pair of 

 saucer-shaped anterior suckers on either side of the 

 mouth, and a circular sucker at the posterior end of 

 the body. 



*' Internal surface of the posterior sucker not 

 divided into areas, and with three pairs of 

 hooks ; anterior suckers connected together by 



a membrane EPIBDELLA. p. 233. 



§iBody elongated-oval, flat, about 4 mm. 

 long ; anterior suckers nearly circular ; 



posterior sucker circular E. Ishikawae. p. 234. 



§^Body squarish-oval, flat, about 2 mm. 



