The Voyage of H.MS "Challenger:' 



Myzastomida.( Supplement). PI I. 



L.v. Graff fee 



F Hut)., Lift' Earn' 



1-3, MYZOSTOMA IM E M B R AN AC E U M , 4 M . LON G I C 1 R R U M , 5-6. M _ FISS U M . 



