2o8 DISCOVERY REPORTS 



furrows. Each ray has on its inside a more or less pronounced eminence, but there are 

 no spines Hke those in Hvdroides. There is a club-shaped pseudo-operculum on the 

 opposite branchial lobe to the operculum. 



The collar is trilobed with a large folded ventral lobe and two lateral lobes which are 

 fused with the thoracic membrane. The latter is rather macerated, but as far as can 

 be seen, it forms a triangular lappet on the ventral surface behind the thorax. 



The collar bristles consist of capillary bristles with delicately denticulated borders 

 and "bayonet" bristles (Fig. 86, d and e). The teeth at the base of the blade in these 

 are much worn and vary much in appearance according to the angle at which they are 

 seen. Looked at directly from above, there are at the top of the boss three teeth in a 

 line, a large tooth and a smaller tooth on each side : the large tooth begins a little below 

 the other two and is set further away from the shaft. Near the base of the large tooth 

 and forming the second row are two double teeth on each side of the chaetal shaft. 

 Below these again is a row of small denticles. 



The remaining dorsal thoracic bristles are bordered capillaries (Fig. 86,/). The thoracic 

 hooks (Fig. 86, g) are provided with six to seven teeth. 



In the abdomen, in addition to the dorsal hooks, there are ventral bristles (Fig. 86, /?) 

 shaped like compressed cups with denticulated edges. One lateral tooth is more developed 

 than the rest. In the posterior abdominal segments there are long capillary chaetae. 

 The tubes (Fig. 86, /) are all fragmentary. They are sinuous, with several low and ill- 

 defined longitudinal ridges, and without distinct peristomes: at their base they coil 

 round in a loose loop-shaped spiral: they are tinged with red. 



Remarks. Kinberg's description and figures of Zopynis loveni are insufficient for its 

 certain recognition. As far as they go, they seem to agree with the present specimens. 

 The present species is very close to S. lo-biancoi, Rioja, which difl^ers, however, in a 

 number of details. In S. lo-biancoi the operculum is eccentrically inserted on its stalk 

 and does not show the same range of variation as does that of this species. Moreover, 

 the arrangement of the denticles on the spur of the collar bristles and the number of 

 teeth in the thoracic hooks are different. 



Genus Hydroides, Gunner 



Hydroides norvegica (Gunner). 



Fauvel, 1927, p. 356, fig. 122 i-o. 

 Mcintosh, 1924, p. 50. 



St. 91. 8. ix. 26. -5 mile off Roman Rock, False Bay, South Africa. 35 m. Gear NRL. Bottom: 

 sand. One specimen. 



Remarks. Mcintosh has recorded this species from the Cape. The present specimen 

 is a typical norvegica, except that there are only 10 chitinous rays on the operculum: 

 the northern forms usually have a larger number. The rays have two teeth on each side 

 and are strongly hooked. 



