I70 DISCOVERY REPORTS 



Specific characters. Up to about 230 mm. in length. The head is very obUque. 



Border of cephalic plate divided into three lobes by two profound lateral notches. 



Hinder border smooth. Nuchal organs long, shaped like a 



fishhook. There are 19 chaetigers: the buccal and anal segments 



alone are achaetous. There are no hooks in the first chaetiger. 



Dorsal bristles of three kinds: (i) stout, narrowly bordered bristles 



with long, slender, barbed tips ; (2) short bristles with broad wings 



and delicate smooth tips; (3) fine barbed capillary bristles. The a| y ^ 



ventral hooks have strong subrostral barbules, a row of four 



parallel teeth, two large and two small above the main fang, and _. . , . 



, r J ■ 1 ^^S- 3 ^ • Asychu am- 



above these a number of denticles. phiglypta. Anal plate. 



The anal plate is very oblique. Ventrally it forms a deep hood or 

 pouch separated by profound lateral incisions from the more dorsal part of the plate. 

 Just above the lateral notches the border forms a pair of lobes which in some of these 

 specimens are pinched out in the middle into a pair of small cirri ; and again the border 

 at its most dorsal and terminal point usually forms a small peak which in some 

 specimens narrows down to a small cirrus. In fact there may or may not be three 

 small cirri, a pair of lateral and a terminal cirrus, arising from the border of the anal 

 plate (Fig. 31). 



Family SABELLARIIDAE 



With 3 rows of paleae Sabellaria 



With 2 rows of paleae . Idanthyrsus 



Genus Sabellaria, Lamarck 



Opercular peduncles more or less fused. Three concentric rows of paleae. No dorsal 

 hooks. A pair of slender palps and sometimes a median tentacle. Numerous filiform 

 tentacles on the ventral face of the peduncles. First and second segments with a bundle 

 of capillary chaetae. Three biramous parathoracic segments. Falciform dorsal branchiae. 

 In the abdominal region the dorsal rami carry small uncini and the ventral capillary 

 bristles. A smooth, achaetous cauda. 



Opercular peduncles completely fused : Subgenus Phragmatopoma 



Inner paleae slender, distally elongate S. {Phr.) moerchi 



Inner paleae stout, roughly funnel-shaped S. {Phr.) antipoda 



Sabellaria (Phragmatopoma) antipoda, Augener. 

 Sabellaria antipoda, Augener, 1926, p. 221, fig. 16 a-c. 



Occurrence. St. 936, New Zealand (i). 



Specific characters. A single very small specimen in poor condition. It measures 

 8 mm. by 0-5 mm. with a cauda i mm. in length. The opercular peduncles appear to be 

 completely fused and the opercular crown is only slightly oblique. There are three 

 concentric rows of opercular paleae which correspond closely to Augener 's figures. The 

 geniculate outer paleae have a rather long and narrow shield ending in the middle in a 



