Renier, 1804
Heteronemertea with a single pair of horizontal lateral cephalic slits; proboscis containing two (outer longitudinal, inner circular) or three (outer longitudinal, middle circular, inner longitudinal) muscle layers and 0-2 muscle crosses; rhynchocoel wall circular musculature not interwoven with body wall muscle layers; dorsal fibrous core of cerebral ganglia branched only at the rear into dorsal and ventral points; nervous system with neurochords and neurochord cells; foregut with longitudinal splanchnic muscles; dermis variable, either comprising of distinct outer glandular and inner connective tissue layers or with gland cell region abutting directly against body wall outer longitudinal muscles without intervening connective tissues; body wall musculature usually with a diagonal layer; caudal cirrus present; dorsoventral muscles, especially in intestinal regions, usually powerfully developed; cephalic glands usually well developed; most species with a frontal organ; eyes present or absent; sexes separate; generally large animals, often with sharpened lateral margins and able to swim actively with sinuous up and down movements.
Source: Gibson, 1982.
The following species of this genus occur in the region:
Cerebratulus fuscus
Cerebratulus marginatus