246 



DISCOVERY REPORTS 



Travisiopsis lanceolata 

 (Text-fig. 45, Table 22) 



The records for T. lanceolata are not numerous but they indicate that it has its southern limit of 

 distribution at the Sub-Tropical Convergence. Measuring up to 31 mm. in length T. lanceolata 

 could have been caught by all the nets used by Discovery Investigations, in all hydrological 



zones. 



In the Sub-Tropical Zone T. lanceolata was taken in the Antarctic Intermediate Water (Sts. 2051, 

 2047, 2081, 1604) and possibly in the South Atlantic Central Water (Sts. 1600 and 258) also. At 

 St. 2055 it may have penetrated into the Warm Deep Water as well. In the Tropical Zone (Sts. 697 

 and 2073) T. lanceolata was caught in either Tropical Surface Water or South Atlantic Central Water 

 and at St. 679 it occurred either in the Warm Deep Water or the Antarctic Intermediate Water. 



Table 22. Occurrence of Travisiopsis lanceolata 



Previous records. T. lanceolata was collected by the Deutsche Sudpolar-Expedition in the Tropical 

 and Sub-Tropical Zones of the South Atlantic (Ehlers, 1913, as Sagittella cornuta (sic)), but in the 

 Indian and Pacific Ocean sectors of the Antarctic this expedition collected it south of the Sub- 

 Tropical Convergence. These anomalous records may be the result of confusion with T. levinseni. 

 Monro (1930) reported T. lanceolata from the Sub-Tropical Zone as Sagitella cornuta and from the 

 Tropical Zone (1939a as T. lanceolata); Friedrich (1950c) reported it from the ' Meteor ', collections 

 but gave no details. 



Tomopteris nisseni 



(Text-fig. 46, Table 23) 



T. nisseni was collected in the Sub-Tropical and Tropical Zones only, and its absence from all nets 

 in the Antarctic and Sub-Antarctic Zones indicates that it has its southern limit of distribution at 

 the Sub-Tropical Convergence. The species measures between 8 and 60 mm. long and could have 

 been caught by all nets used in Discovery Expeditions. 



In the Sub-Tropical Zone T. nisseni was caught in South Atlantic Central Water at Sts. 674, 676, 

 247, 2040, 254, and in Antarctic Intermediate Water at Sts. 673, 677, 2057, 2047, 2081 and 2629. 

 At the other Stations in this zone the nets crossed the boundaries between these two waters and 

 T. nisseni could have been caught in either. In the Tropical Zone it was taken in Antarctic Intermediate 

 water at Sts. 693, 699, 1592, 1594 (1750-950 m.), 2648 (1450-950 m.) 2646 (1500-800 m.) 2639, 2636 

 and in South Atlantic Central Water at St. 1594 (430-300 m.). At Sts. 678, 679, 682, 683, 692, 2648, 

 288, 2079, 2080 (400-0 m.), 2646 (250-0 m.), 1594 (144-0 m.) and 282, T. nisseni was collected by 

 nets towed in both Tropical Surface and South Atlantic Central Water. 



Previous records. T. nisseni has been reported from the South Atlantic by Rosa (1908ft) from 20 S., 

 27 W. and Mcintosh (1925) in recording T. carpenteri from off South Africa probably also referred 

 to this species. Monro (1930) recorded it from Discovery collections in the Tropical and Sub- 

 Tropical Zones. 



