82 BULLETIISr 10 4, UNITED STATES ISTATIONAL MUSEUM 



Cornuspira involvens — material examined 



CORNUSPIRA SELSEYENSIS Heron-Allen and Earland 



Plate 20, Figure 9 



Cornuspira sp.? Earland, Journ. Quekett Micr. Club, ser. 2, vol. 9, 1905, 

 p. 199, pi. 13, figs. 2-4. 



Cornuspira selseyensis Heron-Allen and Earland, Journ. Roy. Micr. Soc, 

 1909, p. 319, pi. 15, figs. 9-11; Proc. Roy. Irish Acad., vol. 31, pt. 64, 

 1913, p. 37; Trans. Zool. Soc. London, vol. 20, 1915, p. 592; Trans. Linn. 

 Soc. London, ser. 2, vol. 11, 1916, p. 217; Bull. Soc. Sci. Hist. Nat. Corse, 

 1922, p. 125; British Antarctic Exped., Zool., vol. 6, 1922, p. 74; Journ. 

 Linn. Soc. Zool., vol. 35, 1924, p. 610. 



"Test free; bilaterally complanate, consisting of a conical tube 

 coiled upon itself in one plane, the width of the tube approximately 

 doubling at each convolution. Primordial chamber, large, the num- 

 ber of convolutions usually three and rarely exceeding five. Shell 

 substance, thin, often semitranslucent. Frequently marked with 

 corrugations, which apparently, indicate periods of rest in the growth 

 of the shell." 



Originally described from the British Isles, this species has been 

 recorded by the authors from the Mediterranean, the Kerimba 

 Archipelago, off South Eastern Africa, from Ijord Howe Island in the 

 Pacific, and from the Antarctic. 



CORNUSPIRA CRASSISEPTA H. B. Brady 



Cornuspira crassisepta H. B. Brady, Proc. Roy. Soc. Edinburgh, vol. 11, 

 1882, p. 714; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 202, pi. 113, 

 fig. 20. — HowcHiN, Trans. Proc. Roy. Soc. So. Australia, vol. 12, 1889, 

 p. 4. — Egger, Abhandl. kon. bay. Akad. Wiss. Mlinchen, CI. II, vol. 18, 

 1893, p. 246, pi. 3, fig. 22.— Rhumbler, Arch. Prot., vol. 3, 1903, p. 287, 

 fig. 138 in text. — Chapman, Journ. Linn. Soc. Zool., vol. 30, 1907, pp. 22, 

 339, pi. 2, fig. 45; Biol. Res. Endeavour, vol. 3, pt. 1, 1915, p. 12.— Halk- 

 yard, Mem. Proc. Manchester Lit. Philos. Soc, vol. 62, pt. 2, 1918 (1919), 

 p. 18.— Cushman, Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 392, pi. 84, 

 fig. 1. — Heron-Allen and Earland, Journ. Roy. Micr. Soc, 1924, p. 

 134.— Hanzawa, Jap. Journ. Geol. Pal., vol. 4, 1925 (1926), p. 37 (table). 



"Test discoidal, biconcave, peripheral edge nearly square; convo- 

 lutions very numerous and very narrow near the center; spiral septal 

 wall thick, and marked externally by a raised limbate line. 



"Diameter, one-fifteenth of an inch (0.5 mm.) or rather more." 



