130 FORAMINIFERA OF THE CRAG. 



3. Transverse section of wborls elliptic (with tlie long axis in the plane of the 

 spire), passing into round or square. Type — C. polygyra, Reuss, 1863 ; see figs. 

 13 rt, ISh. 



Spirillina tenuissima, Giimbel, 1862. 

 Cornuspira nummulitica, Giimbel, 1868. 

 Operculina perforata, Costa, 1856. 

 Cornuspira angulata, Beeche, 1884. 



— pachygyra, Giimbel, 1869. 



— orbicula (Terquein), Deeche, 1886. 



— Archimedis, Stache, 1864. 



— numiamalis {Terquem and Sertlielin), Surbach, 1886. 



— elliptica, Stache, 1864. 



Spirillina numismalis, Terquem and Berthelln, 1875. 

 Cornuspira filiformis, Beuss, 1868. 



— polygyra, Beuss, 1863. 

 Spirillina regularis, Terquem, 1876. 

 Cornuspira liasina, Terquem, 1866. 



— pygmsea, Andreae, 1884. 



— Aminodiscus, or Spirillina, Wisniowski, 1888. 



— rugulosa, Reuss, 1856. 



4. Section of whorls crescentic. Type — G. involvens, Reuss, 1850 ; see 

 figs. 11 a, 11 b. 



Cornuspira involvens, Beuss, 1850. 



— — — 1863. 



— • — • Jones, Parker, and Brady, 1866. 



— — Hantken, 1875. 

 Spirillina orbicula, Terquem, 1875. 

 Cornuspira polygyra (Beuss), Hantken, 1875. 

 Spirillina foliacea (young), Williamson, 1857 (fig. 201). 

 Cornuspira involvens, Balkioill and Millett, 1884. 



— — Brady, 1884. 



— — Brady, Parker, and Jones, 1888. 



— — Sherborn and Chapman, 1889. 



— Senonica, Dunikowski, 1879. 

 Prumentaria (quartae specei), Soldani, 1780. 



Cornuspira ? cretacea. Burrows, Sherborn, and Bailey, 1890 (pi. viii, fig. 6). 



5. Thick, depressed ; section of whorls oblong or elliptic (with the long axis 

 transverse to the spiral plane). Type — G. angigi/ra (Reuss), 1849; see 

 figs. 14 a, 14 b. 



? Cornuspira polygyra, Beuss, 1870 ; vo?i SchlicU, 1870, No. 522. 

 Operculina angigyra, Beuss, 1849. 



