204 DISCOVERY REPORTS 



St. 45. 6. iv. 26. 27 miles S 85° E of Jason Light, South Georgia. 238-270 m. Gear OTL. 

 Bottom: grey mud. Fifty specimens. 



St. 123. 15. xii. 26. Off mouth of Cumberland Bay, South Georgia. From 4-1 miles N 54° E 

 of Larsen Point to 1-2 miles S 62° W of Merton Rock. 230-250 m. Gear OTL. Bottom: grey 

 mud. One specimen. 



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

 Gear N 4-T. Bottom: green mud. One specimen. 



St. 172. 26. ii. 27. Off Deception Island, South Shetlands. 62° 59' 00" S, 60° 28' 00" W. 525 m. 

 Gear DLH. Bottom: rock. One specimen. 



St. 195. 30. iii. 27. Admiralty Bay, King George Island, South Shetlands. 62° 07' 00" S, 

 58° 28' 30" W. 391 m. Gear OTM. Bottom: mud and stones. One specimen. 



St. MS 68. 2. iii. 26. East Cumberland Bay, South Georgia. 1-7 miles S J E to 8i cables 

 SE X E of Sappho Point. 220-247 ^^- Gear NRL. Two specimens. 



Remarks. The largest specimen is that from St. 167 and it measures 63 mm. for the 

 body; the gills are damaged, so that an exact measurement is impracticable, but they 

 appear to have measured about 15 mm. This specimen has 32 abdominal chaetigers, 

 as had Ehlers' original example. The specimen from St. 172 has 26 abdominal chaetigers 

 as had Benham's examples: it measures 20 mm. for the body and about 10 mm. for 

 the gills. On the other hand, the numerous specimens from St. 45 have an average 

 measurement of 25 mm. for the body and 15 mm. for the gills, with only 22 abdominal 

 chaetigers. 



The collar is extremely delicate and is apt to present a rather different appearance in 

 different specimens from the same locality. The mid-ventral cleft extends, as Benham 

 says, to the anterior border of the ist ventral gland shield. Dorsally, the appearance of 

 the collar depends upon the degree of development of the two parallel glandular areas 

 which Benham calls the nuchal gland. In some specimens this gland is not visible. 

 The inner dorsal edges of the collar are fused in their lower part with two lamellae, 

 which are at their ventral edges continuous with the pair of fleshy pads at the base of 

 the branchial lobes. When the nuchal gland is developed, these lamellae are themselves 

 thickened and glandular, and appear as anterior continuations of the nuchal gland. I 

 can confirm Benham's account of the intrabranchial naked filaments, which are, as 

 Fauvel has shown, greatly elongated barbules. The caudal membranes vary greatly in 

 depth and in the extent to which they curve over towards the mid-line. 



All the tubes are of the yellow horny kind as described by Benham, except two from 

 St. MS 68, which have mud walls as described by Ehlers. This is puzzling, but on 

 scraping away the mud, a horny substructure, which appears similar to the ordinary 

 horny tubes, is revealed. 



I do not believe that more than one species of Euchone is represented by these 

 specimens. 



