16, 
warm water indicator and not to be present in typical cold water samples. 
Yet it occurs commonly in the same area where Globigerina pachyderma 
is found abundantly, and Globigerina pachyderma is generally accepted as 
a cold water indicator, 
2. From plotting of the data and drawing of a generalized dis- 
tribution chart a definite pattern results, showing that the distribution is 
closely related to the warm and cold currents in the Atlantic Ocean. 
Recent distribution of Globorotalia menardii in the North Atlantic and the 
Caribbean as known from 400 widely scattered cores indicates that the 
clockwise current system of the North Atlantic is a more important factor 
in the distribution of the species than temperature alone. 
To check the correspondence between the foraminiferal tests in 
the top layer of sediment and the animals actually living in the waters 
above, 210 plankton tows were made during a recent cruise, Data from 
the plankton samples will make a valuable supplement to the study of the 
core tops, Ina study submitted as thesis for the degree of Master of 
Arts to Columbia University, Mr, Julian Kane made a preliminary survey 
of the distribution of planktonic foraminifera from top core samples, 
Climate determinations by planktonic foraminifera, With the 
probability of establishing a standard section of Pleistocene sediments 
about 350 climatic curves have been drawn based on the proportion of the 
number of warm-water to cold-water foraminifera in samples from about 
350 cores, Cores with evidence of turbidity currents, erosion, slumping, 
and re-worked older sediments are not suited for these determinations, 
