in Schistocephalus, [86];

in Rotifers, [199], [216]

Yoruba Worm, [368], [387]

Youatt, on Coenurus, [82]

Yungia, [19], [25]

Zebra, parasites of, [140]

Zelinka, on Rotifers, [198], [215] n., [218], [219], [227], [229];

on Gastrotricha, [232]

Zooecium, [466], [469], [474], [488], [523];

of Phylactolaemata, [495];