TEREBELLIDAE 179 



Remarks. The larger specimens from St. MS 15 have two rows of very conspicuous, 

 oval, white, glandular pads lying just above and between the notopods of the first 12 

 chaetigers. These are not apparent in the small specimen from St. 123, which measures 

 only 25 mm. in length. Their development is probably related to sexual maturity. 



Genus Nicolea, Malmgren 



Two pairs of ramified branchiae. No lateral lobes on the anterior segments. 15-22 

 thoracic chaetigers. Notopods begin on the fourth segment and neuropods on the fifth. 

 The bristles are smooth. The hooks are in double rows over a certain number of 

 segments. 



Nicolea chilensis (Schmarda). 



Hessle, 1917, p. 172. 

 Monro, 1930, p. 191. 



Occurrence. St. 936, New Zealand (2); WS 755 (5); WS 756 (3); WS 762 (8). 



Specific characters. Eye-spots present. The New Zealand specimens (St. 936) and 

 the specimens from St. WS 762 have 17 thoracic chaetigers and those from the other 

 two stations have 18 thoracic chaetigers. There are 17 ventral gland shields. No lateral 

 lobes anteriorly. The bristles are bordered and smooth. The hooks have above the main 

 fang a row of between two and five transverse teeth surmounted by a few denticles. 



Remarks. From the material of the Swedish Southpolar Expedition Hessle records 

 some specimens with 18 thoracic chaetigers and others with 17. Augener, on the other 

 hand, found 18 to be the constant number of thoracic chaetigers in his New Zealand 

 specimens. Hessle includes within chilensis the specimens from Auckland Island 

 attributed by Ehlers to this species. Ehlers states that the number of thoracic chaetigers 

 varies between 17 and 22. I have examined these specimens and actually out of the 

 ten specimens five have 20 thoracic chaetigers, two have 21 , the twenty-first being much 

 reduced, one has ig and the neuropod of the twentieth intermediate in form between 

 those of the thorax and of the abdomen, and two have 18. The two last probably belong 

 to chilensis and the remainder to Augener 's A'^. maxima,^\\ich appears to be a good species 

 and constantly has two or three more thoracic chaetigers than chilensis. 



The position of chilensis does not seem to me quite satisfactory because a chilensis 

 with 17 thoracic chaetigers is very difficult to distinguish from the European A'^. 

 veniistula. According to Hessle the nephridial papillae in chilensis are chimney-shaped 

 in both sexes, whereas in venustula they are long and cirriform in the male and short 

 and chimney-shaped in the female. There appears to be little else to distinguish the two 

 forms. 



Genus Polymnia, Malmgren 

 Three pairs of ramified branchiae. Lateral lobes present on the anterior segments. 

 The first notopods are on the fourth segment and the first neuropods on the fifth. The 

 bristles are smooth and the hooks are in double rows over a certain number of segments. 



