170 THE FORAMINIFEEA 



Genus Spiro'plecta^ Eheenbeeg. 



Early segments planospiral, later ones textularian, 

 uniserial in the latest. Loiver Cretaceous to Becent. 



Example. — >S'. annectens, Parker and Jones sp. 

 {Textularia), ' Ann. and Mag. Nat. Hist.' ser. 3, 

 vol. xi. 1863, p. 92, woodcut, fig. 1. 



This elegant species is more regularly formed in 

 the recent examples from Torres Strait and else- 

 where than in the Gault specimens ; the latter con- 

 sist of fewer chambers, and there is also a tendency 

 for the test to run into the uniserial condition in extra 

 long specimens. Loiver Cretaceous to Becent. (Plate 

 9, fig. J.) 



, Genus Gaudryina, D'Oebigny. 



Early segments triserial (verneuiline), later ones 

 textularian ; aperture either shtlike, as in Textularia, 

 or an orifice situated on a short terminal neck. 

 L. Cretaceous to Becent. 



Exami'LE. — G. Tiifjosa, D'Orbigny, ' Mem. Soc. 

 Geol. France,' vol. iv. 1840, p. 44, pi. iv. figs. 20, 21. 



This species is distinguished by the acutely 

 angular commencement of the test. Other species 

 have the aboral end more rounded, and consequently 

 the triserial beginning is more difficult to distinguish. 

 The recent specimens are, as a rule, more coarsely 

 arenaceous than those from the Cretaceous and 

 Tertiary strata. It inhabits fairly shallow water. 

 Cretaceous to Becent. (Plate 9, fig. K.) 



