16 



BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



The forms of the Cretaceous, particularly the Lower, which have 

 been called Citharina by d'Orbigny, form a more or less distinctive 

 group, but in later formations and in the present ocean there seems 

 to be less distinction between these two groups, and many of the 

 forms referred to Vaginulina by one author may be placed in Margin- 

 ulina or will be found in the old literature under the name Cristellaria. 



VAGINULINA ELEGANS d'Orbigny 



Plate 3, Figures 9, 10 



Vaginulina elegans d'Orbigny, Ann. Sci. Nat., vol. 7, p. 257, no. 1, 1826; ModMes 



no. 54, 1826. 

 Vaginulina legumen (Linnaeus) var. elegans Fornasini, Soc. Geol. Italiana Boll., 



vol. 5, p. 25, pi. 1, figs. 1 ?, 2-8, 1886.— CusHMAN, U. S. Nat. Mus. Bull. 100, 



vol. 4, p. 258, pi. 41, fig. 4, 1921. 



The figured specimens show a rather common, somewhat com- 

 pressed form found in the deeper water of the South Pacific as well 

 as elsewhere. It is very similar to the form figured by Fornasini and 

 referred to d'Orbigny 's species. D'Orbigny 's model No. 54 seems to 

 have definite raised costae, whereas in our Recent form the sutures 

 are very strongly limbate, transparent, and usually not raised above 

 the surface. The initial end usually has a distinct spine. Such forms 

 have occurred at a few Albatross stations, as noted in the Table 8. 



Table 8. — Vaginulina elegans — material examined 



Genus LAGENA Walker and Jacob, 1798 



Lagena Walker and Jacob, in Kanmacher's edition of Adams's Essays Micr., 



p. 634, 1798. 

 Synonyms: Vermiculum Montagu, 1803; Lagcnula (?) Montfort, 1803; Oolina 



d'Orbigny, 1839; Amphorina d'Orbigny, 1849; Fissurina Reuss, 1850; 



Ovulina Ehrenberg, 1854; Phialina Costa, 1856; Hyaleina Costa, 1856; 



Tetragonulina Seguenza, 1862; Trigonulina Seguenza, 1862; Obliquina (?) 



Seguenza, 1862; Ovolina Terquem, 1866; Lagenulina Terquem, 1876; 



Capitellina Marsson, 1878. 



