CHAETOPTERIDAE 153 



Genus Phyllochaetopterus, Grube 



(Claparede char, emend.) 



Phyllochaetopterus socialis, Claparede. 



Fauvel, 1927, p. 84, fig. 30 a-e\ and 1916, p. 451, pi. ix, figs. 44-47, text-fig. i, with synonymy. 



St. 272. 30.vii.27. Off Elephant Bay, Angola. From 13° 11' 00" S, 12° 44*45" E to 13° 09' 45" S, 

 12° 46' 00" E. 73-91 m. Gear OTL. Bottom: green mud and sand. Numerous specimens. 



Remarks. A large cluster of intertangled, indistinctly annulated tubes from which 

 I extracted a number of small examples of this species. The average size is about 

 15 mm. by i mm. They are typical specimens of this species with red bands on the 

 palps, 13 to 14 thoracic chaetigers and 7 to 8 median chaetigers. 



Phyllochaetopterus, sp. 



St. 146. 8. i. 27. 53° 48' 00" S, 35° 37' 30" W. 728 m. Gear DLH. Bottom: rock. Three frag- 

 mentary tubes. 



St. 167. 20. ii. 27. Off Signy Island, South Orkneys. 60° 50' 30" S, 46° 15' 00" W. 244-344 m. 

 Bottom: green mud. Gear OTL. Ten tubes and three fragmentary specimens. Gear N 4-T. Two 

 fragmentary specimens. 



Description. The tubes are large, separate, indistinctly annulated and probably 

 incomplete. The largest measures 22 mm. in length by 4 mm. in diameter. The badly 

 preserved fragments do not permit of a complete account of the systematic characters 

 of this form. The anterior thoracic region has nine chaetigers and measures 12 mm. by 

 5 mm. The thoracic region is a pale yellowish green and the middle and posterior regions 

 are dark green, the posterior being darker than the middle region. 



The anterior end is damaged : there is a pair of large globular tentacles supported 

 internally by a number of fine bristles. A large white glandular cushion extends on the 

 under side from the 6th to the 8th chaetiger. 



The lanceolate bristles of the thoracic region are similar to those found in P. socialis. 

 The giant bristle from the 4th chaetiger is obliquely truncated, slightly excavated at 

 the end and with a finely crenellated apex. It is similar to that figured by Fauvel (1927, 

 fig. 316) for P. major. 



The notopodia of the median region are bilobed with a large accessory lamella 

 (.'' branchia) lying between notopodium and neuropodium. There are two long median 

 segments and possibly more, for the only fragments showing the median region are 

 badly damaged. The 2nd median chaetiger is bilobed and similar to the ist. I cannot 

 tell whether the median neuropodia are bilobed or unilobed. 



The posterior region has numerous segments. Except towards the end of the body 

 the notopodia are free towards their ends only, a condition similar to that found in 

 Mesochaetopterus . The terminal segments, however, have projecting notopodia. Each 

 notopodium has four to six lanceolate bristles. The posterior neuropodia are bilobed 

 with rows of subtriangular uncini with very numerous fine teeth. 



