5 8 DISCOVERY REPORTS 



(3) Station 2006. ' Stolon [this appears to refer to two specimens of the nectosome, without necto- 

 phores, of Stephanomia convoluta] and coloured part of swimming bells [Marrus antarcticus] very deep 

 rich scarlet orange.' 



(4) Station 2010. Part of the siphosome and numerous appendages of Marrus antarcticus: ' Stolon 

 milk white, tinged with a lovely rose pink, large tasters [? gastrozooids] deep purple brown: faint 

 purple-red streak [canal] in bracts, also in swimming bells.' 



Distribution: a a rr 



A. Antarctic Zone 



(1) Boundary depths between the cold bottom water (which must have a small northward creep as 

 well as eastward movement) and the warm deep layer (in which the water must be assumed to have 

 a small southward creep as well as eastward movement) : 



(2) Warm deep water: 



B. Sub-antarctic Zone 

 (4) Water layer into which the antarctic surface water sinks when it sinks below the surface at the 

 antarctic convergence: 



I am obliged to Dr G. E. R. Deacon for identifying the water-masses concerned, and for suggesting 

 the generalization that Marrus antarcticus thus appears to be associated with the antarctic zone and 

 with water that has recently left the zone, or to live in close proximity to such water. It appears to be 

 a deep water or mid-water form; but a scarcity of very deep net hauls prevents the formation of 

 conclusions about its distribution at great depths. 



The figured holotype (a nectophore) came, with other fragments, from 'Discovery II ' Station 943, 

 and bears the Brit. Mus. (Nat. Hist.) Register No. 1952. 11. 19. 26 (Text-fig. 20). 



