Sabatieria balbutiens sp. n. (Figs 13–15, Table 3) Material examined. Holotype male (NIWA 865997), collected 5 April 2007, western Chatham Rise crest (478 m water depth), 43.8266°S, 176.7043°E. Characteristics of surface sediment layer (0–5 mm): medium sand (45.4%), with fine sand (43.9%), and silt/clay (6.6%); calcium carbonate content: 76.7%; total organic matter content: 1.0%; chloroplastic pigment concentration: 6233 ng /gDW sediment. Two male and one female paratypes (NIWA 865998), same data as holotype. Etymology. The species name is the present participle of the latin verb balbutio (= stammer, stutter) and refers to the unusual position of the mouth opening in this species. Description. Male Body cylindrical, slender, tapering slightly towards both extremities. Cuticle with transverse rows of dots, lateral differentiation consisting of larger, irregularly-spaced dots. Two dorso- and two ventro-lateral rows of short, sparse somatic setae. Head slightly set-off by depression at level of cephalic setae. Six minute inner labial papillae, six outer labial papillae, and four short cephalic setae. Ventral lip region extends further anteriorly than dorsal lip region, leading to asymmetry in position of head sensillae and mouth opening directed dorsally (Figs 13 B, 15A). Buccal cavity small, cup-shaped, assymetrical, lightly cuticularised and with three minute tooth-like projections at base (Fig. 15 A). Fovea amphidialis spiral, 2.5 turns, located immediately posterior to cephalic setae. Marginal tubes arising from base of buccal cavity and extending to posterior end of pharynx. Pharynx gradually swelling towards posterior, not forming true bulb, cardia short, 10 µm long. Nerve ring near middle of pharynx. Secretory-excretory system present, with three ventral glands situated close to each other at level of intestine, cardia, and basal portion of pharynx, each with separate duct and opening through common pore situated 0.5 cbd posterior to nerve ring. Intestine wall with numerous small, colourless granules. ...