PLATE XII 



Fig. 4. UmbeUula peUucida Kukenthal. Two specimens from the John 

 Murray Expedition Station 194. The stalk is rigid and straight, 

 but has been artificially coiled when photographed ; it is easily seen 

 in the figures that the axis was thereby fractured in some places 

 (natural size), a, an unripe specimen without eggs in the autozooids. 

 b, a ripe specimen with autozooids crammed with eggs. 



Fig. 5. UmbeUula lindahli Kolliker. Cluster of a typical magniflora 

 specimen from ' Discovery ' St. 366, No. 4 of the table (natural size). 



Fig. 6. UmbeUula UndahU Kolliker. Tassel of an antarctica specimen 

 from 'Discovery' St. 366, No. i of the table (natural size). 



