AMPHARETIDAE 175 



Neuropodial cirri more prominent in the hinder abdominal region than in the anterior. 

 The bristles are bordered capillaries with a curious third flange and the hooks have five 

 teeth in a single row^. The anus is surrounded by a circlet of cirri of different lengths. 

 Remarks. Augener is sceptical of the existence of the third flange on the bristles as 

 figured both by Benham (1921, p. 98) and myself. I have examined the bristles of the 

 present specimens and careful focussing shows a projecting rib or flange running down 

 the middle of the lower part of the bristles. I am inclined to agree with Augener that 

 Benham 's {loc. cit.) P. dibranchiata belongs to this species. 



Genus Neosabellides, Hessle 



Prostomium not distinctly trilobate, without raised glandular bands. Tentacles 

 pinnate. No paleae. No parapodia on the third segment. Branchiae three pairs. No 

 dorsal cirri in the thoracic region; in the abdominal region they are only slightly de- 

 veloped. Neuropodial cirri on a certain number of abdominal segments. There is a pair 

 of anal cirri. 



Neosabellides elongatus (Ehlers). 



Sabellides elongatus, Ehlers, 1913, p. 551, pi. xlii, figs. 1-6. 

 Neosabellides elongatus, Hessle, 1917, p. 104. 



Occurrence. St. WS 177 (3). 



Specific characters. About half a dozen long, very slender tubes of green mud, 

 from which I have extracted three specimens. The largest measures 25 mm. by i mm. 

 The two groups of gills are well separated. There are 14 pairs of thoracic notopods and 

 19 of abdominal neuropods. These specimens are sexually mature and the abdominal 

 region has the body wall very thin and distended with eggs or sperm. In these speci- 

 mens I cannot see either the dorsal or the neuropodial cirri in the hinder region. 

 According to Hessle the last 17 neuropods have small, stumpy neuropodial cirri. The 

 bristles are bordered capillaries. In the thoracic region the hooks have two vertical 

 rows each of four teeth, and in the abdominal region they have three vertical rows each 

 of four to five teeth. The anus is papillated and there is a pair of anal cirri. 



Genus Amphicteis, Grube 



Prostomium clearly trilobed, with two raised glandular bands. Tentacles smooth. 

 Branchiae four pairs. Paleae well developed. Seventeen thoracic chaetigers. Uncini 

 from the 4th chaetiger. A stout dorsal cirrus in the thoracic and in the abdominal 

 regions and usually a neuropodial cirrus in the abdominal region. A pair of anal cirri. 



Paleae much longer than the dorsal bristles A. gunneri, var. antarctica 



Paleae rather shorter than the dorsal bristles A. philippinarum 



Amphicteis philippinarum, Grube. 



Hessle, 1917, p. 118, text-fig. 22 a, b. 

 Augener, 1926, p. 228. 



Occurrence. St. 936, New Zealand (i); 939, New Zealand (i). 



