IC AKT. 8, 6A8HPORD DEIN. 



;il distinctness of 1 1 ><* two forms, are al present I believe sufficiently 

 striking to warranl the creation of a new species. 



GENERAL CONSIDERATIONS. 



As far as our presenl knowledge goes, Japan is the most favor- 

 able region for the study ofmyxinoids. [n no other known locality 

 are four species, representing three genera of these important chor- 

 dates, found living practically Bide by side, for in the neighbor- 

 hood of Misaki they occur within :i distance of .*>0 kilometers. Here 

 too, o form of myxinoid can be obtained in greater abundance 

 than in any locality known to me, and there is also q promising 

 field* for collecting developmental stages, Hitherto the bay oi 

 Monterey bas provided all myxinoid embryos recorded, bul In the 

 latter locality, one may :i<M in parenthesis, the collection of hag-fish 



has been due to the labors of practically :i single fisherman, 

 Ali Tack Lee, whose energetic help is thus almosl o sum qua non* 



li was especially Interesting to me to ascertain thai the relations 

 >>f sex m Homea burgeri were in every way similar to those of the 

 Californian //. stotitt, in spite of the fact that the tonner represents d 

 a si\ and ill« 1 latter :i twelve-gilled form, accordingly, realizing that 

 the only conspicuous structural difference between //. bwgeiH and 

 Myxine is in the matter of the position and confluence of the outer 

 nuls of the branchial ducts, the number o( the i;'ill* being the same — 

 there Beems less ground than ever for attributing to Myxine protandric 

 hermaphroditism, The authors who maintain this, Cunningham and 

 Nansen, haw to ni\ mind been bo unfortunate as to have collected 

 their specimens in a locality whore females alone were abundant 



* l learned tii.u Profetiox Hatte detervea the credit of being th<> Bret soientitt 



to obtain empbrjo* of a inyxinoid tntheeari) nineties he -was successful in obtainin 

 iu\>l «-mi t\v>s ot' h In :'!■. Ba\ of Tokyo, not t'.ir from Oinori. 



