BRITISH MOLLUSCA. 
19 
xxx,yyy, young. Campsey Ash, Suffolk. Presented by 
Rev. — Sheppard. 
Tellina sequata, Sheppard. 
zzz — Jihhh . Aberdeenshire. Presented by Professor Mac- 
gillivray. 
Cyclas flavescens, Macgilliv. 
i Hi. Lakes of Cumberland. 
Cyclas flavescens. 
3. Sph^erium 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 ; Lamk. 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. etfl. 73. t. 6. f. 5 ; Philippi, 
Moll. Sic. ii. 214; Forbes Sf Hanley, Brit. Moll. ii. 115. t. 37. 
f. 7- (as lacustris) t. O. f. 7, animal; Pfeiffer, 122. t. 5. f. 1/? 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. 11. 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. Sf 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. 
1 1, 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. « 
