AST. 14 FOEAMINIFERA FROM TRINIDAD CUSHMAN AND JARVIS 15 



This species, originally described from the Velasco shale of Mexico 

 and later recorded by White from the same formation, occurs in the 

 Upper Cretaceous of Trinidad, where it is fairly common in the mate- 

 rial from Lizard Springs. A rather typical specimen is figured 

 (pi. 3, fig. 9), as well as an extreme form (pi. 3, fig. 10), in which the 

 excavations of the chambers are carried to an unusual degree. This 

 particular specimen also shows the spiral early chambers to good 

 advantage. 



Subfamily Textulariinae 



Genus TEXTULARIA Defrance, 1824 



TEXTULARIA CONCINNA Renss 



Plate 4, Figttres 1, 2 



Textularia concinna Reuss, Verstein. Bohm. Kreide, pt. 2, p. 109, pi. 24, fig. 54, 

 1845-46. — CusHMAN and Jarvis, Contr. Cushman Lab, Foram. Res., vol. 4, 

 p. 91, pi. 13, fig. 1, 1928, 



Two forms occur in the Cretaceous of Trinidad that are here re- 

 ferred to Reuss's species. They occur together at the same locality, 

 but one of these is much larger than the other. The angles of the 

 chambers, however, are similar, and one may represent the micro- 

 spheric and the other the megalospheric form of the same species. 

 The smaller specimens are very typical of this species described by 

 Reuss from Europe. 



Family VERNEUILINIDAE 



Genus VERNEUILINA d'Orbigny, 1840 



VERNEUILINA POLYSTROPHA (Reuss) 



Plate 4, Figures 3 o, 6 



BuUmina polystropha Reuss, Verstein. Bohm. Kreide, pt. 2, p. 109, pi. 24, fig. 53, 

 1845-46.— Alth, Haidinger's Naturw. Abh., vol. 3, pt. 2, p. 265, pi. 13, fig. 

 19, 1850. 



Verneuilina polt/stropha H. B. Bkady, Ann. Mag. Nat. Hist., ser. 5, vol. 1, p. 436, 

 pi. 20, figs. 9 a-o (?), 1878. 



Test elongate, slightly tapering, triserial, rounded in end view; 

 chambers inflated, distinct, slightly longer than broad; sutures dis- 

 tinct, depressed ; wall arenaceous, rather smoothly finished ; aperture 

 rounded at the inner margin of the last-formed chamber. Length, 

 0.45; breadth, 0.15 mm. 



This species was described by Reuss from the Cretaceous of Ger- 

 many. It occurs in the Cretaceous of America, but the Recent mate- 

 rial usually referred to it is probably not the same. 



