Marsipobranchia
Marsipobranchia , noun, plural
[New Latin, from Greek {not transcribed} a pouch + {not transcribed} a gill.]
(Zoology) A class of Vertebrata, lower than fishes, characterized by their purselike gill cavities, cartilaginous skeletons, absence of limbs, and a suckerlike mouth destitute of jaws. It includes the lampreys and hagfishes. See Cyclostoma, and Lamprey. Called also Marsipobranchiata, and Marsipobranchii.