248 



DISCOVERY REPORTS 



Table 23 . Occurrence of Tomopteris nisseni 



Tomopteris ligulata 

 (Text-fig. 47, Table 24) 

 T. ligulata was collected only to the north of the Sub-Tropical Convergence and the records obtained 

 indicate that it is restricted in the South Atlantic to the Sub-Tropical and Tropical Zones. T. ligulata 

 rarely measures more than 1 1 mm. in length but it appears to have been missed by the N 50 and 

 N 70 nets and was caught only by the larger N 100 and TYF and it is possible that it is more abun- 

 dantly distributed than the records suggest. 



In the Sub-Tropical Zone T. ligulata was collected in South Atlantic Central Water at Sts. 714, 

 677, 247 and 2028, in Antarctic Intermediate Water at St. 2051, and one or other of these water 

 masses at St. 1555. In the Tropical Zone this species was taken in Tropical Surface Water or South 

 Atlantic Central Water at Sts. 686, 688 and 689, and in Antarctic Intermediate Water at St. 687; at 

 St 699 it was collected in either South Atlantic Central or Antarctic Intermediate Water. 



Table 24. Occurrence of Tomopteris ligulata 



Previous records. Rosa's (1908 b) original records of T. ligulata included one from the South Atlantic 

 in 33 S., 30' W., and Monro (1936) reported it (as T. planktonis) from St. 714. I have re-examined 

 the specimens reported by Ehlers (1917) as T. ligulata from 62 42' S., 82 o' E. in the Antarctic Zone, 

 and consider them to be T. planktonis. Friedrich (1950 c) probably included this species in his 

 Tomopteridae, reported from the South Atlantic 'Meteor' collections. 



