THE FAMILY GLOBIGERINIDiE 207 



This is a thin-shelled form, consisting of a nauti- 

 loid spire, subglobular, or compressed bilaterally, with 

 miibilical depressions, and a lobulated margin. The 

 specimens ordinarily obtained from deep-sea deposits 

 are imperfect, showing only the bases of the spines 

 which in the living condition beset the surface of the 

 test. Sir John Murray, in referring to the appear- 

 ance of this interesting form when alive, says : ' At 

 times calcareous Foraminifera occur in vast numbers 

 on the surface, and with a bottle can be picked up 

 from a boat. In one specimen thus procured the 

 sarcode of the animal was found thrown out into 

 bubble-like extensions between the spines of the 

 shell, and over these expansions of the sarcode and 

 along the spines the pseudopodia moved freely and 

 rapidly.' 



H. pelagica is by no means a common form in 

 ordinary dredgings, but from surface dredgings speci- 

 mens are often procured in considerable numbers. 

 (Plate 11, fig. J.) 



Genus PuUeiiia, Parkek and Jones. 



Test regularly or obliquely nautiloid and involute ; 

 segments only slightly ventricose. Shell-wall very 

 finely perforated ; aperture a long curved slit close to 

 the line of union of the last segment with the 

 previous convolution. Cretaceoiis to Becent. 



Example. — P. spJuEVoides, D'Orbigny sp. (Noiiio- 

 nina), ' Ann. Sci. Nat.' vol. vii. 1826, p. 293, No. 1 ; 

 ' Modele,' No. 43. 



The shell is subglobular, with a smooth or even 



