PISIDIUM 315 



1909. Pisidium duhium, n. sp. : Lindholm, in Korotneff, 

 Wissensch. En/ebn. Zool. Exped. Baikal.-See, 

 iv, p. 85, pi. ii, f. 45, 46. 



First recorded as British in 1838, by J. Alder. (See ref. 



above.) 

 British Distribution in Time : Pliocene to Recent. 



4. Pisidium nitidum, Jenyns. 

 Etyni. : — Lat. nitidus, shining. 



1832. Pisidium nitidum, Nobis : Jenyns, Trans. Camb. Phil. 



Soc, iv, p. 304, pi. XX, f. 7 & 8. 

 1840,1 Pisidium nitidum, Jenyns: Gray, in Turton's Manual, 

 Apr. / new ed., p. 283, pi. xii, f. 150. 



■q , [ Pisidium nitidum, Jenyns : Brown, Illust. Conch. Brit., 

 , r^Q I ed. 2, p. 95, pi. xxxix, f . 26. 



1843. Cyclas nitida, Jenyns : Hanley, Cat. Rec. Bivalve Shells, 



p. 90. 

 ?1845. Pisidium nitidum, Jenyns : Brown, Illust. L. & F.-W. 



Conch. Brit., p. 121, pi. xxiv, f. 11. 

 1849. Pisidium ■nitidum, Jenyns : Forbes & Hanley, Brit. 



Moll., ii, p. 126, pi. xxxvii, f. 14. 

 1854. Pisidium incertum. Nob. : Normand, Coup d'ceil Cyclades 



Nord, p. 6. [Quotes Jenyns sp. & fig. as 



synonym.] 

 1854. Pisuni nitidum, Jenyns : Deshayes, Cat. Conch. Brit. 



Mils., ii, p. 277. 



1856. Pisidium nitidum, Jen. : Moquin-Tandon, Hist. Moll. 



France, ii, p. 586, pi. Hi, f. 33-37. 



1857. Pisidium nitidum, Jenyns : Gray, in Turton's Manual, 



new ed., p. 265, pi. xii, f. 150. 



1858. Muscidium nitidum, Jenyns : H. & A. Adams, Genera 



Moll., ii, p. 451. 



1859. Pisidium pusillum, var. obtusalis : Jeffreys, Ann. <& 



Mag. Nat. Hist., Ser. Ill, vol. iii, p. 37. 



1862. Pisidium pusillum, var. obtusalis : Jeffreys, Brit. 



Conch., i, p. 24. 



1863. Pisidium nitidum, Jenyns : Reeve, L. & F.-W. Moll. 



Brit. Is., p. 231, figs. 

 1871. Pisidium (fiyclmlina) nitidum : Clessin, Malak. Bldtt., 



xviii, p. 189. 

 ?1873. Pisidium pileus, n. sp. : Clessin, Correspond.-Bldtt. 



zool.-min. Ver. Regensburg, xxvii, p. 150. 

 ?1873. Pisidium fossarinum, p acuminatum, Clessin: Clessin, 

 in Westerlund, Fauna Moll. Scecicc, p. 545. 

 1873. Pisidium (Fossarina) nitidum, Jenyns : Clessin, in 

 Westerlund, o.c, pt. ii, p. 551. 



