CORNUSPIRA INVOLVENS. 131 



Cornuspirse. with surface-ornamentation. 



1. Type — foliacea. 



CoENUSPiEA STBIOLATA, Brady, 1884. 'Challenger' Eeport, p. 202, pi. cxiii, 



figs. 18, 19. 



In Operculina plicata, Czjzek, 1848, ' Haiding. Abhandl.,' vol. ii, p. 146, pi. xiii, 

 figs. 12, 13, the surfaee-markinga seem to be merely lines of growth. 



2. Type — Beussi. 



OpEECtiLiNA CAEINATA, Gosta, 1856. Atti Aeead. Pontaniana, vol. vii, fasc. 2, 



pi. svii, fig. 15. 

 CoENuspiEA BoENEMANNi, Eeuss, 1863. Sitz. k. Akad. Wiss., vol. slviii, Abth. 1, 



p. 39, pi. i, fig. 3. 



— CAEINATA, Brack/, 1884. ' Challenger ' Eeport, p. 201, pi. xi, fig. 4. 



— — Sherborn and Chapman, 1889. Journ. E. Micr. Soc. for 



1889,p.484, pi. xi, fig.6. 



— — Fornasini, 1893. Mem. E. Accad. Sci. Istit. Bologna, 



ser. 5, vol. iii, p. 431, pi. i, fig. 5. 



— — Egger, 1893. Abhandl. k. Bayer. Akad. Wiss., vol. xviii, 



Abth. II, p. 247, pi. iii, figs. 16, 17. 



3. Type — jwh/gyra. 



CoENUSPrEA CEASSI8EPTA, Brady, 1884. 'Challenger' Eeport, p. 202, pi. cxiii, 



fig 20. 



— — Egger, HQ^. Abhandl. k. Bayer. Akad. Wiss., vol. xviii, 



Abth. II, p. 246, pi. iii, fig. 22. 



4. Type — involvens. 



CoRNUSPiEA LACUNOSA, Brady, 1884. ' Challenger ' Eeport, p. 202, pi. cxiii, 



fig. 21. 



In the foot-note at page 1 of Part I of this Monograph Reuss's Cornuspira 

 cretacea was referred to Trochammina perhaps on insufficient grounds. It 

 appears to comprise two, if not three, forms of Cornuspira, thus : 



18 



