340 UNIONID^ 



1849. Unio lumidus, Retzius : Forbes & Hanley, Brit. Moll., 



ii, p. 140, pi. xl, f. 1. 

 18.52. Unio ovalis, Mont. : Leach, Moll. Brit. Synop., p. 323. • 

 1852. Margaron {Unio) lumidus, Retz. : Lea, Synop. Naiades, 



ed. 3, p. 36. 



1856. Unio [Lymnium] tumidus, Philip. : Moquin-Tandon, 



Hist. Moll. France, ii, p. 577, pi. li, 

 f. 11-14. 



1857. Unio tumidus, Retzius : Gray, in Turton's Manual, 



new ed., p. 279, pi. ii, f. 13. 



1862. Unio tumidus, Philippsson [sic] : Jeffreys, Brit. Conch., 



i, p. 32; V, pi. ii, f. 1, 1 a. 



1863. Unio tumidus, Philippson [sic] : Reeve, L. & F.-W. 



Moll. Brit. Is., p. 219, figs. 

 1875. Unio Richensis : Harting, Rambles, p. 37, pi. iv, f. 1 & 2. 



First recorded as British in 1686, by M. Lister {Hist. 



Conch., ii, pi. cxlvii, f. 2). 

 British Distribution in Time : Pleistocene to Recent. 



3. fUnio cantianus, Kennard & Woodward. 

 Etym. : — Lat. Cantium, the county of Kent. 



1912. Unio batavus, Lam. : Kennard, Proc. Malac. Soc. Land., 



X, p. 50. [Non Lamarck.] 

 1924. Unio cantianus, n. sp. : Kennard & Woodward, Proc. 



Malac. Soc. Lond., xvi, p. 136, figs. 



First recorded as British in 1912, by A. S. Kennard, as 



U. batavus. Lam. {See ref. above.) 

 British Distribution in Time : Pleistocene. 



4. fUnio prestwichi, Kennard & Woodward. 



Etym. : — Named in honour of the celebrated geologist. Sir 

 Joseph Prestwich. 



1924. Unio prestivichi, sp. nov. : Kennard & Woodward, 

 Quart. Journ. Geol. Soc, Ixxx, p. 173, pi. ix, 

 f. 1-6. 



First recorded as British in 1924 as above. 

 British Distribution in Time : Pleistocene. 



5. fUnlo Ilttoralis, Cuvier, 



Etym. : — Lat. Utoralis, pertaining to the shore. 



1798. Unio litforalis : Cuvier, Tabl. EUm., p. 425. 



1801 Unio littoralis, n. : Lamarck, Syst. Anim. s. Vert., p. 114. 



' [Cites fig. in Ency. Method., Vers, pi. ccxlviii, 



.^"- . f 2.] [Non Poiret, April, 1801.] 



