IQ PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 



Genus TRITAXIA Reuss, 1860 



TRITAXIA PYRAMIDATA Reuss 



Plate 4, Figures 4 a, b 



Tritaxia pyramidata Reuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, pp. 32, 88, pi. 



1, fig. 9, 1862 (1863) ; Palaeontographica, vol. 20, pt. 2, p. 123, 1872-75 

 (1874). — Berthelin, Mem. Soc. G^ol. France, ser. 3, vol. 1, p. 25, pi. 1, 

 figs. 4 a-G, 1880.— Chapman, Jouru. Roy. Micr. Soc, p. 2, pi. 11, figs. 2 a, b, 

 1892. — Fkanke, Abh. geol. pal. Inst. Univ. Greifswald, vol. 6, p. 18, pi. 



2, figs. 1 a-c, 1925; Abh. Preuss. Geol. Landes., new ser., vol. Ill, p. 138, 

 pi. 12. figs. 18 a-c, 1928. 



This is a common species in the European Cretaceous and occurs 

 both in the Trinidad collections and also in those of the general 

 Coastal Plain region of the United States. It differs from Tritaxia 

 ti'icaHnata in the much greater increase in diameter toward the aper- 

 tural end, that of typical T. tricarlnata being of generally uniform 

 width throughout. The test is triserial throughout, and the aperture 

 becomes rounded and terminal, usually protuberant, and with a 

 slight lip. 



Genus GAUDRYINA d'Orbigny, 1839 



GAUDRYINA FILIFORMIS Berthclin 



Pi ATE 4, Figure 5 



Gaudryina fiUformis Bebthelin, M6m. Soc. Geol. France, s6r. 3, vol. 1, p. 25, 

 pi. 1 (24), figs. Sa-d, 1880. — Cushman and Jarvis, Contr. CuShman Lab. 

 Foram. Res., vol. 4, p. 92, pi. 13, fig. 2, 1928. 



In the Lizard Springs material, typical slender specimens of this 

 species occur. The small, very elongate, slender test and the con- 

 siderable length of the early triserial stage will distinguish it. It 

 is widely distributed in the Cretaceous of various parts of the world. 



GAUDRYINA RUGOSA d'Orbigny 



Plate 4, Figures 6 o. b 



Gaudryina rugosa d'Orrigny, M4m. Soc. G§ol. France, s6r. 1, vol. 4, p. 44, pi. 4, 



figs. 20, 21, 1840.— Reuss, Verstein. Bohm. Kreide, pt. 1, p. 38, pi. 12, figs. 



15, 24, 1845-46 ; in Geinitz, Gruudr. A^ersteiu., p. 667, pi. 24, fig. 69, 1845-46 ; 



Sitz. Akad. Wiss. Wien, vol. 18, p. 244, pi. 5, fig. 61, 1856.— Fr^vnke, Abh. 



geol. pal. Inst. Univ. Greifswald, vol. 6, p. 14, pi. 1, fig. 19, 1925; Abh. 



Preuss. Geol. Landes., new ser., vol. Ill, p. 141, pi. 13, fig. 2, 1928. 

 Textularia agglutinans W. Berry (not d'Orbigny), in Berry and Kelley, Proc. 



U. S. Nat. Mus., vol. 76, art. 19, p. 3, pi. 2, fig. 1, 1929. 



Test elongate, tapering, greatest breadth toward the apertural 

 end, periphery broadly rounded, early triserial portion usually much 

 reduced, but the change to the biserial stage very abrupt; chambers 

 numerous, usually distinct in the biserial portion, indistinct in the 

 triserial portion, very .slightly inflated in the later development: 



