Foraminiferal Limestones. 247 



The following foraminifera were observed in this rock : — 



Miliolina hicornis ? ("Walker & Jacob). 



Serpula bieornis, "Walker & Jacob, 1798, Adams's Essays, Kamnaclier's ed., 



p. 633, pi. xiv, fig. 2. 

 Miliolina bicortiis (W. & J.), Brady, 1884, Kep. Chall., vol. ix, p. 171, pi. vi, 



figs. 9, 11, 12. 



A transverse section of a specimen closely resembling that of 

 M. hicornis is seen in the slide of No. 550. It is impossible, 

 however, to speak with certainty as to the exact species. 



Miliolina trigonula (Lamarck). 

 Some examples of the above species are present in No. 550. 



Textularia rugosa (Eeuss). 

 Several specimens of this species occur in our slide. 



Carpentaria, near utricularis, Carter. 



Fragments of the tests of Carpenteria are rather numerous in 

 No. 550, and those with a distinctly pitted surface probably belong 

 to the above-named species. There are also some fragments with 

 more even surfaces which may belong to C. tnonticularis, Carter. 



Rotalia schroeteriana?, Parker & Jones. 



A species of Rotalia is common in this rock-specimen, which 

 with some reservation we may ascribe to the above form. 



Gypsina globulus (Reuss). 

 This species occurs here in some numbers and is fairly large. 



Amphistegina lessonii, d'Orbigny. 

 Common in the slides of No. 550. 



Heterostegina depressa, d'Orbigny. 



This species is represented in No. 550 by very large specimens, 

 some of which show a raegalospheric commencement. The centre 

 of the disc in these specimens is very thick and often curved, giving 

 rise to sections showing both the vertical and tangential aspects 

 of the shell. 



