McConnell's cannibalism experiments with members of this phylum contributed to the concept of "memory RNA".  Members of this phylum are responsible for the grass-blade climbing behavior of Dictyoselium. One class contained in this phylum features a scolex and excretes waste via protonephridia. Several species in this phylum experience part of their life cycle in snails and cause Katayama fever. Like rotifers and nemertean
McConnell's cannibalism experiments with members of this phylum contributed to the concept of "memory RNA".  Members of this phylum are responsible for the grass-blade climbing behavior of Dictyoselium. One class contained in this phylum features a scolex and excretes waste via protonephridia. Several species in this phylum experience part of their life cycle in snails and cause Katayama fever. Like rotifers and nemerteans, these organisms excrete waste via flame cells. Members of this phylum possess auricles containing tactile cells and chemoreceptors and also have light-sensince ocelli. This phylum includes the organisms that cause schistosomiasis. These unsegmented, bilaterally symmetric organisms are acoelomates. For 10 points, name this phylum, which contains classes such as Turbellaria and Trematoda and organisms like planarians.
McConnell's cannibalism experiments with members of this phylum contributed to the concept of "memory RNA".  
platyhelminthes [or flatworms]