278 CLAUSILIID^ 



1840. Marpessa, subg. of Clausilia : Gray, in Turton's Manual, 



new ed., p. 212. 

 1855. Clausiliastra, subg. of Clausilia : Pfeipfer, Malak. 



Bldtt., ii, p. 180. 

 1882. Marpessa [as a genus] : Jousseaume, Bull. Soc. Zool. 



France, vii, p. 452. 



1. Marpessa laminata (Montagu). 

 Etym. : — Lat. lamina, a plate. 



1774. Helix bidens : Muller, Verm.. Hist., ii, p. 116. [Non 



Linne.] 

 1777. Turbo bidens, Linn. : Pennant, Brit. Zool., ed. 4, 8vo, 



p. 131 ; 4to, p. 113, pi. Ixxxi [f. 117]. 

 ?1778. Strombiformis [pars] : DaCosta, Test. Brit., p. 107. 



1791. Turbo bidens [pars] : Gmelin, Linn. Syst. Nat., ed. 13, 



i, pt. 6, p. 3609. 

 [Montagu {Test. Brit., p. 356) cites Gnielin's Turbo 

 perversus as a synonym for this species, but that 

 was Balea.] 



1792. Bulimus bidens, nob. : Bruguiere, Ency. method.. Vers, 



i, p. 352. 



1798. Cerion bidens, Gmelin [pars] : Bolten, Mus. Bolt., ii, 



p. 90. 



1799. Turbo bidens : Pulteney, Cat. Dorset., p. 46. 



1801. Pupa bidens : Draparnaud, Tabl. Moll. France, p. 61. 

 1803. Turbo laminatus : Montagu, Test. Brit., p. 359, pi. xi, 



f. 4. 

 1805. Clausilia bidens. Mull. : Draparnaud, Hist. Moll. 



Frarice, p. 68, pi. iv, f. 5-7. 

 1807. Turbo laminatus : Maton & Rackett, Trans. Linn. Sac, 



viii, p. 179. 

 1813. Turbo lanmiatus : Rackett, Pulteney's Cat. Dorset., 



ed. 2, p. 51, pi. xix, f. 9. 

 1813? Odostomia laminata : Fleming, Edinb. Ency., vii, p. 76, 



pi. cciii, f. 6. 

 1815. Volvulus bidens : Oken, Lchrb. Naturg., iii, abt. 1, 



p. 313. 

 1817. Turbo laminatus, Pult. : Dillwyn, Cat. Shells, ii, p. 874. 



1819. Clausilia lamellata : Leach, Moll. Brit. Synop. (proofs), 



p. 118. 



1820. Helix {Clausilia) bidens, Flem. : Ferussac, Journ. Phys., 



xc, p. 300. 

 1821,) Helix {Cochlodina) derugata : Ferussac, Tabl. sys.t 

 Jan. j Liinagons, Jan. ed., p. 67 (June ed., p. 63). 



1821. \ Clausilia bidens, Linn. : C. Pfeiffer, Naturg. Deutsch. 

 early/ Moll., i, p. 60, pi. iii, f. 25. 



1821,) Clauselia {Marpessa) bidens hyalina : Gray, Lond. Med. 

 Mar J Repos., xv, p. 239. 



