ZOOPLANKTON 



89 



As with the phytoplankton, see p. 40, the numbers of zooplankton organisms are 

 recorded as numbers per haul with the different nets for particular lengths of tow 

 specified, and not as numbers per cubic metre of water. In charts comparing the 

 plankton at different stations in the survey, the numbers are expressed in similar 

 specified units, for example numbers per 50 m. vertical haul with the N 70 V nets or 

 numbers per 1 mile tow with three N 100 H nets. If the nets filtered a column of water 

 equivalent to that passing through the ring of the net if no net was attached, then the 

 N 70 V nets would sample 19-25 cu.m. in a 50 m. haul and the N 100 H nets would 

 sample approximately 1850 cu.m. for every mile tow. Actually not all this quantity of 

 water will be filtered, but if we wish to arrive at a minimal figure for animal life per 

 cubic metre we may divide the figures given by the two nets accordingly. 



LIST OF ZOOPLANKTON SPECIES 



Those shown in heavy type were the more important in the present survey. 



PROTOZOA 



FORAMINIFERA 



G. pachydermia (Ehrenberg). 



G. triloba, Reuss. 



Globor alalia (Pulvinulina) scitula (Brady). 



RADIOLARIA 



Globigerina conglomerata, Schwager. 

 G. bulloides, d'Orbigny. 

 G. dutertrei, d'Orbigny. 



Inter alia: 



Aulosphaeridae. 



Protocystis (Challenger id) sp. 



Catablema weldoni, E. T. Browne. 



Coelodendrum sp. 

 Porospathis sp. 



CILIATA 

 Tintinnidae. 



COELENTERATA 



ANTHOMEDUSAE 



Sibogita borchgrevinki, E. T. Browne. 



LEPTOMEDUSAE 

 Cosmetirella sp. 



NARCOMEDUSAE 

 Pegantha sp. Solmundella sp. 



TRACHYMEDUSAE 

 Botrynema brucei, E. T. Browne. Trachynemidae. 



Homoeonema sp. 



SIPHONOPHORA 



Chuniphyes multidentata, Leres and Van Riemsdigk. Hippopodius serratus(}), Moser. 



Crystallophyes amygdalina, Moser. 

 Dimophyes arclica (Chun). 

 Diphyes antarctica, Moser. 

 Galeolaria truncata (Sars). 



Bero'e, sp. 



Praya cymbiformis (Delle Chiaje). 

 P. diphyes, Vogt. 

 Pyrostephos vanhoffeni, Moser. 

 Thalassophyes crystallina, Moser. 



CTENOPHORA 



Pleurobrachia sp . 



