338 UNIONID,^ 



1845. Unio rostrata, Kokeil Museum : Brown, o. c, p. 109, 



pi. XX, f. 1, 2. 

 1845. Unio aleronii : Companyo & Massot, [Bull] Soc. Agric. 



Pyr.-Orient., vi, pt. 2, p. 234, pi., f. 2. 

 ?]845. Unio dactylus, spec. nov. : Morelet, Hist. MoU. Port., 



p. 110, pi. xiv, f. 2. 

 ?1845. Unio mucidus, spec, nov.: Morelet, o. c, p. Ill, pi. 



xiv, f. 3. 

 1849. Uniojiictorum, Linnaeus : Forbes & Hanley, Brit. Moll., 



ii, p. 142, pi. xxxix, f. 1. 

 1852. Unio pidorum, Linn. : Leach, Moll. Brit. Synop., p. 324. 

 1852 Margaron (Unio) pictorum, Retz. : Lea, Synop. Naiades, 



ed. 3, p. 36. 

 1856. Unio {Lymnium) Requicnii, Mich. : Moquin-Tandon, 



Hist. Moll. France, ii, p. 574, pi. 1, f. 5-7. 



1856. Unio {Lymnium) pictorum, Linn. : Moquin-Tandon, 



t. c, p. 576, pi. 1, f. 8-10; Ii, f. 1-10. 



1857. Unio pictorum, Linn. : Gray, in Turton's Manual, new 



ed., p. 279, pi. ii, f. 11. 



1862. Unio pictorum, Linne : Jeffreys, Brit. Conch., i, p. 34; 



V, pi. ii, f. 2. 



1863. Unio pictorum, Linnaeus : Reeve, L. & F.-W. Moll. 



Brit. Is., p. 221, fig. 



First recorded as British in 1674, by M. Lister {Phil. 



Trans., ix, p. 99, pi. ii, f. 27). 

 British Distribution in Time : Pleistocene to Recent. 



2. Unio tumidus, Retzius. 



Etym. : — Lat. tumidus, swollen. 



?1758. Mya pictorum [pars]: Linnaeus, Syst. Nat., ed. 10, 



p. 671, no. 19. 

 ?1767. Mya pictorum [pars]: Linnaeus, o. c., ed. 12, p. 1112, 



no. 28. 

 U774. Mya pictorum [pars] : Muller, Verm. Hist., ii, p. 211. 

 ?1777. Mtja pictorum [pars] : Pennant, Brit. ZooL, ed. 4, iv, 



8vo, p. 79; 4to, p. 67. 

 ?1778. Mya pictorum [pars] : DaCosta, Test. Brit., p. 228. 

 1788. Unio tumidus : Retzius, Nova Test, genera, p. 17. 



[Frequently, but erroneously attributed to Philipsson, 

 who was respondent for, not author of, the thesis.] 

 ?1791. Mya pictorum [pars] : Gmelin, in Linn. Syst. Nat., 



ed. 13, i, pt. 6, p. 3218, no. 3. 

 1801. Mya deprcssa : Donovan, Brit. Shells, iii, pi. ci. 

 1801. Mya ovata : Donovan, t. c, pi. cxxii. 

 1801,1 Unio pictorum [pars] : Draparnaud, Tabl. Moll. France, 

 Jul v./ p. 106. 



