CORNUSPIRA INVOLVENS. 129 



CoENUSPiBA ixvOLTENS, Ano7i. [Ohapman'], ISSS. Science News, April, p. 389, fig. 7. 

 — — Brady, Parker, and Jones, 1888. Trans. Zool. Soc, vol. sii, 



p. 216, pi. xl, figs. 1—3. 



Whether the foregoing scheme (p. 126) will hold good when the test of micro- 

 and megalo-spheres (see p. 90) comes to be applied is doubtful. A modification of 

 this scheme, leading to a more natural classification of the Gornuspiras, has been 

 worked out by our collaborateur, Mr. F. W. Millett, with the synonymy in full. 

 It is based upon the form (more or less actual or presumed) of the transverse 

 section of the animal as shown in the woodcut illustrations (figs. 10 — 15) at 

 pages 126, 127, which were prepared according to Mr. Millett's suggestion. The 

 following lists of the published figures are ai-ranged by Mr. Millett on this plan 

 and in zoological series, instead of in the usual chronological order of dates. 



1. Animal much compressed, increasing suddenly in width. Type — Gornu- 

 spira foliacea (Philippi), 1844; see figs. 10 a, 10 b. 



Cornuspira foliacea, Williamson, 1857 (figs. 199, 200). 

 — - — Jones, Parker and Brady, 1866. 



— — Balkioill and Wright, 1885. 



— — Goes, 1882. 



— — Reuss, 1865. 



— — var. cassis, Eeuss, 1870 {Schlicht, No. 520, 1870). 



— — Brady, 1884. 



— — Schicager, 1877. 



— — (not named) WalUcli, 1862. 

 Operculina ammonitiformis, Costa, 1856. 

 Orbis foliaceus, Philippi, 1844. 



Operculina plicata, Gzjzek, 1848. 



Cornuspira Eeussi {Bornemann) , Reuss, 1870 (Schlicht, No. 525, 1870). 



— foliacea, Fornasini, 1893. 



— tenuissima, Schwager, 1865. 



— — (not named) Carpenter, 1885. 



— striolata, Brady, 1884. 



2. Compressed, whorls increasing regularly and uniformly in width. Type 

 — G. Beussi (Bornemann, 1855), Reuss, 1866; see figs. 12a, 12b. 



Cornuspira carbonaria, Steinmann, 1880. 



— foliacea, Chapman, 1891. 



— Eeussi, Bornemann, 1855. 



— involvens, Burbach, 1886. 



— orbicularis, Mariani, 1891. 



— cretacea. Chapman, 1891. 



— — Reuss, 1860. 

 Operculina striata, Czjzek, 1848. 



