UB7 



SOME VIRGULININAE IN THE COLLECTIONS OF THE 

 ALLAN HANCOCK FOUNDATION 



(Plates 21-28) 

 Joseph A. Cushman and Irene McCulloch 



In this fourth paper presenting the results of studies being made on 

 the foraminiferal collections of the Allan Hancock Foundation, The 

 University of Southern California, the third list of station tables is in- 

 cluded. These three tables are continuations of Table 6 (see pp. 9-11, 

 146-148) ; of Table 7 (see pp. 11-13, 148-150) and Table 8 (see pp. 13- 

 21, 150-152). With new material coming in constantly it has been im- 

 possible to complete the study of any one family or genus. 



The foraminifera included in this paper mostly belong to the genus 

 Bolivina and show a very considerable amount of variation. Figures on 

 the plates show this variation to some extent and also the striking differ- 

 ences in the megalospheric and microspheric forms of the same species. As 

 in other foraminifera, the adult characters are taken on much earlier in 

 the megalospheric form, and it is in the comparison of these adult cham- 

 bers that the relationships between the two forms become apparent. 



[179] 



