BRITISH MOLLUSCA. 
19 
x x x,y y y, young. Campsey Ash, Suffolk. Presented by 
Rev. — Sheppard. 
Tellina sequata, Sheppard. 
z z z — h hhh. Aberdeenshire. Presented by Professor Mac- 
gillivray. 
Cyclas flavescens, Macgilliv. 
i i i i. Lakes of Cumberland. 
Cyclas flavescens. 
3. Sphjerium lacustre. 
Cardium lacustre, Mont. T. B. 89. 
Tellina lacustris, Linn. Trans, vii. 60 ; Turton , C. D. 180 ; Wood , 
Gen. Conch. 197. t. 47. f. 5 ; Dillw. Bee. Shells , i. 104 ; Penn. 
B. Z. ed. 1812. iv. 184. no. 23. 
Cyclas calyculata, Drap. 130. 1. 10. f. 14, 15 ; LamJc. Hist. v. 559, 
ed. 2. vi. 269; Brown , III. C. G. B. 94. t. 39. f. 28; Hanley , 
Bee. Shells, 1-89; Gras, Moll. t. etjl. 73. t. 6. f. 5 ; Philippi, 
Moll. Sic. ii. 214; Forbes fy Hanley, Brit. Moll. ii. 115. t. 37. 
f. 7. (as lacustris) t. O. f. 7? animal; Pfeiffer, 122. t. 5. f. 17, 18 ; 
Nilsson, 99 ; Turton, Man. ed. 1. 14. t. 1. f. 3 ; Kickx, Moll. 
Brab. 89; Desh. E. M. Vers, ii. pt. 2. 37- 
Cyclas lacustris, Turton, Biv. 249. 1. 1 1. f. 18 ; Brown, III. Conch. 
G. B. 94. t. 39. f. 20 ; Flem. Brit. An. 453. 
Young. The apex of the shell large relatively to the size of 
the specimen. 
Inhab. rivers. 
Var. 1. Shell orbicular, less compressed, sub diaphanous, red- 
dish brown. 
Cyclas lacustris, Alder, Cat. 1, 40, Brit. Mus. ; Alder, Trans. 
Nat. Hist. Soc. Newcastle, 1, 40; Gray, Man . L. fy Freshw. 
Shells, 281. t. 1. f. 3. 
Cyclas calyculata /3, Jenyns, l.c. 11. 
Inhab. ponds. 
Var. 2. Shell orbicular, rhombic, rather ventricose, subdiapha- 
nous, reddish ; unbones less prominent, blackish. 
Cyclas stagnicola, Leach, MSS. fide Lamk. 
C. calyculata, var. 2, Lamk. Hist. v. 559. 
C. , y, Jenyns, l. c. 11. 
Inhab. North of England {Jenyns). 
a — h. Yorkshire. Presented by W. Sewell, Esq. 
i — c c. Coggeshall, Essex. 
d d — s s. Pond near Edinburgh. 
tt, uu. Belfast. Presented by W. Thompson, Esq. 
v v — m m m. Britain. 
n n n — y y y. River Fosse, York. Presented by P. Carpenter, 
Esq. 
