MARGARITIPERA 343 



1. fMargaritifera auricularia (Spongier), 



Etyiu. : — Adjective from Lat. auricula, an oar, 



1788. Unio margaritiferus [pars] : Retzius, Nova Test. Genera, 



p. 16. 

 1793. Unio auricularius : Spengler, Skrivt. Naturh.-Selsk. 



Kj^benliavn, iii, lift. 1, p. 54. [Cf. Haas, 



Vidensk. Med. Dansk. Nalurh. For. Kj^ben- 



havn, Ixv, 1913, p. 53.] 

 rSOl. Unio margaritifera : Draparnaud, Tabl. Moll. France, 



p. 107. 

 1803. Mya margaritifera [pars] : Montagu, Test. Brit., p. 33. 

 1805. Unio margaritifera, Linn. : Draparnaud, Hist. Moll. 



France, p. 132, pi. x, f. 17, 18 [errore 8 & 16] 



& 19. 

 1807. Mya margaritifera [pars] : Maton & Rackett, Trans. 



Linn. Soc, viii, p. 40. 

 1819. Unio sinuata : Lamarck, Hist. Anim. s. Vert., vi, pt. 1, 



p. 70. [C . Haas, Abhandl. Senck. Naturf. 



Gesell., xxxii, p. 152, pi. xiii, f. 1-5.] 

 1825. Unio sinuata. Lam. : C. Pfeiffer, Naturg. Deutsch. 



Moll, ii, p. 33, pi. vii, f. 4. 

 1827. Unio crassissima, Ferussac [MS.] : Des Moulins, Bull. 



Hist. Nat. Soc. Linn. Bordeaux, ii, p. 42. 



1836. Margarita (Unio) crassissima, Fer. : Lea, Synop. 



Naiades, ed. 1, p. 40. 



1837. Unio arcuata, nob. : Bouchard-Chantereaux, Mem. 



Soc. Agric. Boulogne, Ser. II, torn, i, p. 227, 



pi. f, 1, 2. 

 1840. Mysca {Potomida) sinuata. Lam. : Swainson, Treatise 



Malac., p. 379. 

 1856. Unio (Lymnium) simuitus. Lam. : Moquin-Tandon, 



Hist. Moll. France, ii, p. 567, pi. xlviii, f. 1-3. 

 1910. Unio sinuatus, Lam. : Haas, Abhandl. Senckenb. Naturf. 



Gesell., xxxii, p. 152, pi. xiii, f. 1-5. 

 1910. Pseudunio sinuatus. Lam. : Haas, Nachrbl. Deutsch. 



Malak. Gesell., xiii, p. 181. 

 1913. Pseudunio atiricularius, Spengler : Haas & Schwarz, 



Abhandl. K. Bayer. Akad., xxvi, abth. 7, p. 3. 

 1916. Margaritana auricularia, Spglr. : Haas, Bol. Soc. 



Aragonesa, xv, p. 33. 



First recorded as British in 1909, by J. W. Jackson & 

 A. S. Kennard (Journ. of Conch., xii, p. 321), as 

 Unio margaritifer var. sinuata, Larak. 



British Distribution in Time : Holocene. 



2. Margaritifera margaritifera (Linne). 



Etym. : — Lat. margarita, a pearl -\- fero, I bear. 



1758. Mya margaritifera : Linn.^us, Syst. Nat., ed. 10, p. 671, 

 no. 20. 



