POLYSTOMELLA CRISPA. 353 



3. Polystomella crispa {Linne), 1767. Plate II, figs. 40 — 43. 

 Part I, 1866, Appendices I and II, Tables, No. 95. 



Cornu Hammonis minus vulgare, Orbiculatum, &c, Plancus, 1739. Conch, minus 



notis, Edit. Venet. (and Edit. Eouiae, 1760), 

 p. 10, pi. i, figs. 2 D, E, F. 

 Nautilus minimus, &c, Gaultieri, 1742. Index Test. Conch., pi. six, figs. A 



andD. 

 Nautilus ceispus, Linni, 1758. Syst. Nat., ed. 10, p. 709, No. 235 ; edit. 12, 



p. 1162, No. 275; edit. 13 (G-melin's), 

 p. 3370, No. 3. 

 Cornu Hammonis, Ledermuller, 1760. Mikroscopisch. Gemiiths, &c, p. 16, pi. viii, 



fig. 5. 

 Nautilus tahulatus, minimus, umbilicatus, marginatus, et granulatus, Martini, 



1768. N. Syst. Conch.-Cab., p. 250, pi. xx, 

 figs. 172—174. 

 Nautilo, Targioni, 1770. Eelaz. Viaggia, vol. iv, p. 8, pi. i, figs. 6 — 8. 

 Nautile microscopique granuleux, D' ' Argenville (Favanne), 1780. Conchyliologie, 



vol. i, p. 680, pi. vii, fig. B 1 ; p. 728, pi. Ixix, 

 fig. D 2. 

 Nautilus ceispus, Spenghr, 1781. Nye Saml. k. Danske Selsk. Skr., vol. i, 



p. 368 [pi. i], figs. 1 a— c. 

 Nautilus spiralis geniculis crenatis, Walker and Bogs, 1784. Test. Min. Ear., 



p. 18, pi. iii, fig. 65. 

 Nautilus ceispus, Adams, 1787. Essays Microsc, p. 640, pi. xiv, fig. 30. 

 Nautili striati communes (crispi, Linnaei), Soldani, 1789. Testaceogr., vol. i, 



part 1, p. 54, pi. xxxiii, fig. F; and pi. xxxiv, 

 figs. Gr, H (umbonate P. crispse) ; and fig. I 

 (impoverished P. strigillata, between crispa 

 and macella). 

 Hammonia crispa, Soldani, 1789. Ibid., p. 54, pi. xxxiv, fig. cc (an explanate 



Polystomella, near P. macella). 

 Nautilus ceispus, Ficlitel and Moll, 1798. Test. Microsc, p. 40, pi. iv, figs, d — 



f; and pi. v, figs, a, b. 



— ambiguus, 1 F. and M., 1798, p. 62, pi. ix, figs. d—f. 



— ceispus, Kanmacher (Walker and Jacob), 1798. In Adams's Essays 



Microsc, 2nd edit., p. 640, pi. xiv, fig. 30. 



— — Fulteneg, 1813. Hutchins's Hist. Dorset, 2nd edit., vol. iii, 



p. 42, pi. xix, fig. 29. 



1 Nautilus ambiguus, F. and M., although possibly a Feneropolis, has the angular row of perfora- 

 tions representing the aperture typical of Polystomella ; and, if it be the latter, P. ambigua (F. and M.) 

 is one of the varieties ranging between striatopunclata and crispa. It is much like P. Listeri, d'Orb., 

 ' For. Foss. Vien.,' pi. vi, figs. 19 — 22. On the same plate d'Orbigny has figured other closely related 

 varieties, as P. Hauerina, figs. 1, 2 ; rugosa, figs. 3, 4 ; obtusa, figs. 5, 6 ; and Antonina, figs. 17, 18. 



