236 DISCOVERY REPORTS 



In the Sub-Antarctic Zone, T. mulleri is concentrated along the Greenwich Meridian between ioo 

 and 750 m. in summer, but is found in the deeper layers, between 250 and 1500 m. in winter, within 

 Sub-Antarctic Surface Water, Antarctic Intermediate Water and Warm Deep Water. 



T. mulleri was collected at five stations in the South Sandwich Survey (Text-fig. 36, Appendix II, 

 Table b) ; at three of these stations the nets fished in the Warm Deep Water and at the other two in 

 Weddell Sea Water. 



Miscellaneous records of Typhloscolex mulleri (Text-fig. 36), include no catches from Antarctic 

 Surface Water, north of the northern limit of Weddell Drift, but elsewhere there are records from 

 all explored water masses. The absence of T. mulleri to the west of, and between Sts. 85 and 2640 

 is probably of no significance, because few fine mesh nets were hauled there. 



Previous records. Apart from Hardy and Gunther's records (1935) of T. mulleri noted above, the 

 species has not previously been reported from the South Georgia area. 



Stop-Bowitz (1949) reported T. mulleri from the Antarctic Zone at five stations made by the 

 'Norwegica', in the summers of 1927-8 and 1928-9 about the Greenwich Meridian. These records 

 are from stations south of 56 53' S. and from between 50-19, 100-49, IOO_ 5°» 200-98, 400-201 and 

 400-202 m., of which those hauled above 100 m. are presumably from the Weddell Drift and the 

 others from the Warm Deep Layer. Although small in number these catches provide additional 

 evidence for the suggestion that T. mulleri invades the Antarctic Surface Water south of the northern 

 limit of Weddell Drift only. 



Monro (1930) reported T. mulleri from St. SS 53 but no other references in literature from the 

 South Sandwich area have been noted. 



Other records of T. mulleri from the Antarctic Zone have been reported by Augener (1929) from 

 the Weddell Sea (o° 23' S., 200-0 m., and 72 20' S., 600-0 m.). From the 'Meteor' expedition 

 Friedrich (1950 c) reported Typhloscolex (probably including mulleri) in the Sub-Antarctic and 

 Antarctic Zones as far south as latitude 65 S. 



T. mulleri has been frequently reported from the Sub-Tropical and Tropical Zones. Reibisch 

 (1895) recorded it in large numbers from 200 m. to the surface, north of io° S. between Ascension 

 Island and the mouth of the Amazon, and to the Cape Verde Islands. Ehlers (1913) reported it 

 from 12 11' S., 6° 16' W., 2000 m., io° 45' S., 6° 32' W., 400 m., 8° 43' S., u° 55' W., 3000 m. and 

 o° 52' S., 16 W., 400 m. Friedrich (1950c, fig. 4) may have referred to it in the many Typhloscolex 

 records he noted between 40 S. and the Equator. Stop-Bowitz (195 1) reported it from Tropical 

 Surface Water. 



Travisiopsis levinseni 

 (Text-fig. 36, Appendices I and II) 

 T. levinseni is a cosmopolitan species normally measuring between 13 and 18 mm. in length; it was 

 caught by all nets used by the Discovery Investigations except the N 50. Although widely distri- 

 buted in all explored water masses of the South Atlantic, T. levinseni was never caught in abundance. 

 In the majority of cases, only a single specimen was taken (the largest catch consisting of three 

 specimens), but there is a possibility that it was accidentally missed by the nets. T. levinseni was 

 collected around South Georgia in the Warm Deep Water only; in the South Sandwich Survey, 

 where the majority of nets fished in the Antarctic Surface Water, it was never collected ; along the 

 o° Line it was caught by nineteen nets hauled in the Warm Deep Water and by only three nets in the 

 surface water; elsewhere in the Antarctic Zone it was collected six times in the Warm Deep Water 

 and twice by nets which may have traversed this layer into Antarctic Surface Water. These results 

 suggest that in the Antarctic Zone, T. levinseni is probably a Warm Deep Water species. 



