256 s. GOTO. 



small, bean-sliaped, sessile suckers arranged iu 

 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. 

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



pair of hooks at the posterior end of the body ; 



i:enis spines in 5 pairs 0. major, p. 203. 



*- 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 



pairs 0. minor, p. 205. 



f ' 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 DICLIDOPHOEA . 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 jpedicels ; jjenis 



with G hooks D. smaris. p. 207. 



"- Body elongated, not so broad as in the j)reced- 



ing, about 8 mm. long ; posterior suckers 



hemispherical, with long pedicels and arranged 



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



"•■3 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. 



