128 



THE FUR SEALS OF THE PRIBH.OF ISLANDS. 



Sttmmary.— A. typica (Diesing) belongs to Dnjardiirs subgenus Anisal-is (type, 

 A. Ihissumicrii). It was described in 1860 by Diesing as type of a supposed new genus 

 Conocejihalus, but Krabbe (1878) and Drasche (1883) showed that the structure upon 

 which the genus was based was not a part of the worm. Krabbe described it as a 

 new species, A. conocephalus; Drasche placed it in the genus Peritrachelius; Leidy 

 misdeter mined specimens from the raciflc Ocean as ^^Ascaris simplex Eudolphi," and 





Fig. 31. 



•' '-• *'■ Fifr. 32. 



it is not at all impossible that Dujardin's '■'■A. .si»?/)/e.r Rudolphi" = J.. J)nsmm\erii is 

 identical with this form (see p. Ifll). In detail the history of the species is as follows: 

 Historical review.— For a discussion of Dujardin's form see page 101. Diesing 

 (18G0, p. 669) described a parasite (fig. 30) as Conocephalus iupicKs, type and only 

 species of a sui)po8ed new genus, as follows: 



Familia XII. Conocephalidea. Character g<!iieris iinic'i siiuul familiae. 



XLI. Conocephalus DiesiuK- 

 CorpiLs elongatum teretinscnlniii. Caput coiiicum, limbo siio postico orenulato a corpore distante 

 retractile. Os iu ajjice capitis. Extreiiiitas caiidalis maris semispiralis, milttiis excavata, papilla 



