SPH^ERIUM 305 



First recorded as British in 1890, by B. B. Woodward 

 {Proc. (Icol. Assoc, xi, p. 378), as a variety of *S'. 

 Cornewn. 



British Distribution in Time : Pleistocene. 



G. Sphaerium lacustre (Miiller). 



Etym. : — Low. Lat. lacustris, belonging to a lake. 



1774. Tellina lacustris : Muller, Verm. Hist., ii, p. 20i. 

 1791. Tellina lacustris: Gmelin, in Linn. Syst. Nat., ed. 13, 



i, pt. 6, p. 3242. 

 1803. Cardium lacustre, Gmel. : Montagu, Test. Brit., p. 89. 

 1805. Cyclas caliculata : Draparnaud, Hist. Moll. France, 



p. 130, pi. X, f. 14 & 15 [err. pro 13 & 14]. 

 1807,) Cyclas lacustris : Ferussac, Essai method. Conch., 

 early./ p. 128 (in table No. 176). 



1807, \ Musculium lacustre : Link, Beschreib. Natural. -Saniml. 

 May.]" U7iiv. Rostock, Abth. 3, p. 152. 



1807. Tellina lacustris, Linn. Gmel. : Maton & Rackett, 



Trans. Linn. Soc, viii, p. 60. 



1812. Tellina tuberculata, mihi : Alten, Syst. Abhandl., p. 4, 



pi. i, f. 1. 



1813. Cyclas {Tellina) tenera, Schrank : Gartner, Ann. 



Wetterau. Gesell., iii, p. 316. [? Non 

 Schrank.] 



1817. Tellina lacustris, Mull. : Dillwyn, Cat. Shells, i, p. 104. 



1818. Cyclas (Corneocyclas) lacustris. Mull. : (Ferussac in 



litt.) Blainville, Diet. Sci. Nat., xii, p. 279. 

 1818. Cyclas tuberculata, mihi : Klees, Dissert. Test. Tubingen, 



p. 45. 

 1818,) Cyclas staynicola. Leach: Lamarck, /^js/. Anim. s. Vert., 

 July./ V, p. 559 (as synon. for C. calyculata, Drap.). 



1821. Cyclas calyculnla, Drap. : C. Pfeiffer, Naturg. Deutsch. 



Moll, i, p. 122, pi. V, f. 17 & 18. 

 1823. Tellina stagnicola (Leach MS.) : Sheppard, Trans. Linn. 



Soc, xiv, p. 150. 

 1823. Tellina lacustris : [Brx;)Wn], Ency. Brit., ed. 6, vi, p. 408. 

 1827. Cyclas lacustris, Laui. : Brown, Illust. Conch. Brit., 



ed. 1, pi. xvii, f. 13. 

 1831. Cyclas calyculata : Turton, Manual, p. 14, f. 3. 

 1831. Cyclas lacustris : Turton, o. c, p. 14, f. 4. 

 1831. Cyclas stafjnicola. Leach : Turton, o. c, p. 14, in Text. 

 1839. Cyclas Ddingoli, N. : Bivona, Giorn. Sci. Lett. Palermo, 



ixiv (altered in MS. to Ixvi), p. 221. 

 1840,1 Cyclas lacustris, Mont. : Gray, in Turton's Manual, 

 Apr. / new ed., p. 281, pi. i, f. 3. 



o .1 Cyclas calyculata, Drapernaud : Brown, Illust. Conch. 

 J JJJ- j" Brit., ed. 2, p. 91, pi. xxxix, f. 21. 



N.-M. MOLL. X 



