DESCRIPTION OF SPECIES 129 



Text-fig. 54 supplements the information in Table 35 by showing some forms of dorsal tubercle 

 and intestine in the present specimens. These comparisons show that the type and only specimen of 

 Arnback's M. angulata lies within the range of variation of the much more abundant 'Discovery' 

 material, which is readily identifiable as M. pedunculata. M. angulata must therefore be regarded as 

 a synonym of M. pedunculata, as suggested by van Name (1945). 



Remarks. See p. 137 for notes on the differences between this species and M. sabulosa (Quoy & 

 Gaimard) which Kott (1952, 1954) believes to be identical. 



Distribution. Antarctic (Graham Land, Kaiser Wilhelm II Land, South Georgia, Kerguelen). 



O Q Q Q 



o & o 



B 



Text-fig. 54. Molgula pedunculata Herdman : A, different forms of opening of the dorsal tubercle ; 

 B, different forms of gut (clear) and left gonad (stippled). 



Molgula falsensis Millar (Text-fig. 55) 

 Molgula fakensis Millar, 1955, pp. 217-9, %• 4°- 



Occurrence. St. 91 : False Bay, S. Africa, 35 m. 



External appearance (Text-fig. 55 A). The six specimens range from 8 by 8 mm. up to 13 by 

 7 mm. All of them are covered with adhering fragments of shell and grains of sand. 



Test. The test is thin, flexible and transparent and has a sparse coating of very fine hairs. 



Body wall. Muscles which radiate from the siphons extend only a short distance across the sides 

 of the body; other muscles, oblique and circular, are very few, except round the siphons. 



Tentacles. There are about twenty-one oral tentacles, of which four or five are large and tri- 

 pinnate. Only eight to ten tentacles were present in the type specimens (Millar, 1955). 



Dorsal tubercle. The C-shaped opening of the dorsal tubercle faces backwards and to the right 

 (Text-fig. 55 B). 



17 



