Pelagic Hyperiidea — Bary 
333 
misto gatidichaudii and Cyllopus magellanicus 
(and also C macropis). Two species, Hyperia 
spinigera and Hyper oche medusarum, were rarely 
captured, but may be considered as inhabit- 
ants of cold waters. In the New Zealand area 
the first occurred in water of subantarctic 
origin, the second in mixed water, probably 
being influenced by subantarctic water. The 
influence of subtropical water is apparent in 
the moderate numbers of Hyperoche mediter- 
ranean a warm-water species captured in west- 
ern Foveaux Strait. Additional evidence of 
this influence accrues from the rare occur- 
rences of other warm-water species, Platyscelis 
ovoideSn Paralycaea graciliSn and possibly also 
Hyperia hengalensis. The cosmopolitan species 
Phronima sedentaria and Primno macropa were 
in low numbers, but were present in mixed 
subtropical-coastal waters and also in water of 
subantarctic origin. 
There is reasonably close agreement be- 
tween the distributions of species relative to 
water properties in the area, as shown by the 
T-S-P diagrams, and their distributions as 
recorded previously. It is rare in these earlier 
accounts for temperatures and/or salinities to 
be included^ the relationships of which are 
important to the interpretation of species’ dis- 
tributions; nor are the interrelationships of 
species necessarily discussed. Data relevant to 
these features are necessary in discussion of 
vertical distribution where waters of diverse 
origins may be more or less stratified, and in 
horizontal distribution where waters of differ- 
ent properties may be mixing. It appears of 
small value to record the presence of species 
without also obtaining hydrological data by 
means of which ecological and distributional 
relationships may be assessed. With these 
data collected, the T-S-P diagram offers a 
means of precisely summarising it and, at the 
same time, demonstrating some of these re- 
lationships. The diagrams also emphasise the 
need to include, at least, data on temperatures 
and salinities in any discussion of distribution. 
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