25 G 



s. GOTO. 



small, boan-sliaped, sessile suckers arranged in 

 straight lines on each side on the ventral surface of 

 the hindmost portion of the body ; penis consisting 

 of three bulbs armed with long, hollow spines ; with 



chitinous hooks at the posterior end of the body ...OCTOCOTYLE. p. 203. 

 "1 Body thick, about 4 mm. long ; with a single 



pair of hooks at the posterior end of the body ; 



penis spines in 5 pairs 0. major, p. 203. 



"2 Body thick, about 2 mm. long ; with two pairs 



of hooks at the posterior end of the body, the 



inner pair being filiform ; penis spines in G 



pf^ii^.g 0. minor, p. 20.5. 



i ^ Body always symmetrical ; with a pair of spheroidal 

 suckers within the mouth, and with four pairs of 

 hemispherical suckers arranged in a semicircle or a 

 horse-shoe shape at the posterior end of the body, 

 mostly [ provided with pedicels ; penis spherical and 

 with a certain number of hooks ; without any hook 



at the posterior end of the body DICLIDOPHOKA. p. 207. 



-••iBody elongated, C.\-8 mm. long, in form 

 like that of the leaf of a rose with a narrow 

 anterior portion; with the four pairs of 

 hemispherical posterior suckers, arranged in a 

 semicircle at the top of long pedicels ; penis 



with hooks D. smaris. p. 207. 



"- ]lody elongated, not so broad as in the preced- 

 ing, about 8 mm. long; i)osterior suckers 

 hemispherical, with long pedicels and arranged 



in a semicircle; penis with 8 hooks D. elongata. p. 210. 



•'î'Body elongated-oval, about 5 mm. long; 

 posterior suckers hemispherical, sub-sessile, 

 arranged in a semicircle; penis with G hooks... D. sessilis. p. 212. 

 ^''■*Body long and slender, spatulate, 5-15 mm. 

 long, with a long, slender posterior portion ; 

 posterior suckers sessile, semi-ellipsoidal, 



