PISIDIUM 317 



1874. Fisidiuin {Fossdrina) fossarium, var. curtain : Clessin, 



iu Martini & Chemnitz, Co)ich. Cab., cd. 2, 



ix, abth. 3, Cycladccu, p. 34. 

 1877. Pisidlum submersum, n. sp. : Clessin, Malak. Bldlt., 



xxiv, p. 179, pi. iii, f. 6. [Teste Odhner.] 

 1880. Piaidium tritonis, Clessin : Clessin, in Studer, Zool. Anz., 



iii, p. 207. [Nom. niod.] 

 1880. Fisidium imbutum, Clessin : Clessin, I. c. [Nom. 



nud.] 

 1890. Fisidiuin (Fossarina) fontinale, var. cwrtum, Cless. : 



Westerlund, Fauna Faldarct. Region, vii, 



p. 26. 

 1890. Fisidiuin (Fossarina) obtusale, var. personatum. Malm : 



Westerlund, t. c., p. 35. 

 1890. Pisidium tritonis, Clessin : Clessin, Moll. Fauna 



Oesterr.-Umjar., p. 783, f. 517. [Teste 



Odhner.] 

 1890. Pisidium imbutum, Clessin : Clessin, o. c, p. 784, f. 518. 



[Teste Odhner.] 

 1890. Pisidium Moussonianum, m. : Clessin, o. c, p. 787, 



f. 522. [Teste Odhner, who further records 



seeing specimens under the manuscript name 



of locarnense.] 

 1890. Fisidiuin lurjanense : Clessin, o. c., p. 789, f. 523. 



[Teste Odhner.] 

 1899. Pisidium clessini, n. sp. [pars] : Surbeck, Rev. Suisse 



Zool., vi, p. 482, pi. xii, f. 6-15. 



First recorded as British in 1908, by B. B. Woodward 



{Froc. Malac. Soc. Lond., viii, p. 124). 

 British Distribution in Time : Pleistocene to Recent. 



6. Pisidium pusillulum, B. B. Woodward. 

 Etyni. : — Lat. ■pusillulus, very small. 



?1791. Tellina pus ill a : Gmelin, in Linue, Syst. Nat., cd. 13, 



i, p. 3231, no. 16. 

 1819. Tellina pusilhi [pars] : Turton, Conch. Diet., p. 167. 

 1822. Cyclas pusilla [pars] : Turton, o. c, p. 251, pi. xi, f. IG 



& 17. 

 1822. Cyclas fontinalis, Lam. : Nilsson, Hist. Moll. Svecice, 



p. 101. [Fide Malm, Gotheborgs K. Vet. & 



Vitt. Samhdll. Handl, iii, 1855, p. 104.] 



1831. Cyclas pusilla, Turton : Turton, Manual, p. 16, f. 7. 



1832. Pisidium pussillum, Gmel. : Jenyns, Trans. Camb. Phil. 



Soc., iv, p. 302, pi. XX, f. 4-6. 

 1832. Euylcsa Ilcnslowiana, Leach MSS. : Jenyns, t. c, 



]). 302, in synon. 

 1810,1 Fisidiuin pusilluin, Turton : Gray, in Turtou's Manual, 

 Apr. J now ed., p. 283, pi. i, f. 7. 



