schizonemertea

from The Century Dictionary.

• noun Hubrecht's name (1879) of a division of nemertean worms, correlated with Hoplonemertea and Palæonemertea, containing the sealongworms which have the head fissured, the mouth behind the ganglia, and no stylets in the proboscis, as Lineus, Cerebratulus, Langia, and Borlasia.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A group of nemerteans comprising those having a deep slit along each side of the head. See Illust. in Appendix.