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SOME TEXTULARIIDAE OF THE PACIFIC OCEAN 



(Plates 13-16) 



C. G. Lalicker and Irene McCulloch 



This is the second report of a series of papers presenting the results of 

 studies being made on the foraminiferal collections of the Allan Hancock 

 Foundation, The University of Southern California. Most of the fora- 

 minifera discussed in this paper were collected in shallow waters on the 

 seven major cruises of the Velero III, under the command of Captain 

 Allan Hancock, into tropical waters of the eastern Pacific beginning at 

 San Pedro, California, and continuing southward to the Bird Islands 

 off Peru. The stations where specimens of Textulariidae were found are 

 listed at the end of the discussion for each of the species described in this 

 paper. Such lists refer to the tables of stations for bottom samples given 

 in the first report. (See pp. 3-30, J. A. Cushman and Irene McCulloch, 

 A report on some Arenaceous Foraminifera, Allan Hancock Pacific Ex- 

 peditions, 1939, Vol. 6, no. 1, pp. 1-113, pis. 1-12.) 



Some very interesting facts concerning the distribution and migra- 

 tion of a number of species of foraminifera have come to our attention 

 in the course of this study. Textulana articulata d'Orbigny, which has 

 been reported as living off the west coast of France, is living also off the 

 west coast of the Americas from California southward to Peru. This 

 species, which is common in Miocene sediments of the Vienna Basin, 

 France, Florida, and New Zealand, is established as one of the group 

 having world-wide distribution. T. calva Lalicker, which has been noted 

 only in the vicinity of the West Indies and in the Caribbean Sea, has a 

 wide distribution in the Pacific Ocean. T. lythostrota (Schwager), 

 which is present in Pliocene sediments of Kar Nicobar and New Guinea, 

 has been found in these collections. Of still greater interest is the pres- 

 ence of so many of d'Orbigny's species from the vicinity of the West 

 Indies. T. agglutinans, T. candeianUj T. conica, and T. saulcyana are 

 rather common in these collections. These species may have migrated 

 before the uplift of a land bridge between North and South America 

 during Pliocene time or during one of the warm interglacial stages of 

 Pleistocene time when the level of the sea was higher than at the present 

 time. 



[115] 



APR 3 IWU 



