2 o8 DISCOVERY REPORTS 



analysis of hydrographic correlations (Pickford, 1946). The distribution of Vampyroteuthis in relation 

 to the water masses of the Atlantic and Indian Oceans is shown in Figs. 2 and 3. The names adopted 

 here for the various water masses are those used by Sverdrup, Johnson & Fleming (1942). In the 

 Atlantic the species inhabits the upper layers of the Deep Water and moves upwards into the North 

 Atlantic Central Water. New records made by the ' Discovery ' show that it also moves upwards into 

 the South Atlantic Central Water. This was entirely to be expected, but it is satisfactory to have 

 verification. 



15 



w 10 

 tr 



D 

 I- 

 < 



UJ 

 CL 



5 



UJ 



I- 



<J _ 



1 — r 



"i — 1 — 1 — 1 — 1 — 1 — 1 — r 



VAMPYROT EUTHI S 



NDIAN OCEAN 



P REVIOU S 

 DISCOVE RY 



1 — T 



_L 



J_ 



J_ 



CIRCUMPOLAR WATER 



-ANTARCTIC 

 .1 I I L_ 



BOTTOM 

 J I L 



W. 



34 



34 5 



35 



35 5 



SALINITY %„ 

 Fig. 3. The distribution of Vampyroteuthis infernalis in relation to the water masses of the Indian Ocean. 



In the Indian Ocean the few previous records are from the Indian Deep Water and upwards into 

 the Indian Equatorial Water. One of the two Discovery records is from the Deep Water. The other, 

 specimen No. 98 from the Somali Basin, is from a region where Red Sea Water is flowing out to join 

 the Equatorial Water. At the present time there are no records from Indian Central Water. 



The distribution of Vampyroteuthis in relation to temperature, salinity, and density is further 

 summarized in Fig. 4 in which the new records are indicated in solid black. Empirically the species 

 appears to be restricted to water of salinities between 34-4 and 35-4 % , of temperatures between 2 and 

 io° C, and of densities between <r t 27-0 and 27-9. Dr E. F. Thompson has suggested that the last 



