BRITISH MOLLUSCA. 
17 
Cycladse, Fleming, B. A. 409, 1828 ; Gray in Turton, Man. ed. 2. 
277, 1840. 
Cyclas, Lamk . Syst. 1801. 
Cycladia, Rafin. Coq. Biv. Ohio, 1820. 
Cycladese, Menke, Syn. ed. 1. . 
Cvclasidse, D’Orbigny , Voy. Amer. Mend.; Geimtz. 
Veneriadai, part., Leach , 1818; Ann. fy Mag. N. H. xx. 2/2. 
1. Sph^erium. 
Sphserium (cornea), Scopoli , Introd. N. Hist. 397> 1//7 (not 
Charp. 1824). 
Nux, Humph. Calonne Cat. 1796. 
Cycladea, Rafin. Anal. Nat. 1815. 
Cornea, Megerle , Entwurf . 56, 1811. 
Cyclas, sp. Lamk. Hist. An. s. V. 1818. Tr 
Cyclas, sp. Brug. Ency. Meth. 301, 1/92; Lamk. Sys . A. s. V. 
123,1801; not Klein, 1753 ; Leach, 1818. 
Comeocyclas, Eerussac in Blainv. Diet. Sci. Nat. xn. 277$ 1818. 
Cvglas, Oken, Lehrb. Nat. (eiTor of press). 
Cyclas, Pfeiffer, Naturg. i. 123, ii. 3, 1822; Nilsson, Moll. Suec. 
95. 
1. Sphserium rivicole. 
Tellina cornea 0, Maton Racket, Linn. Trans, viii. 59; Tur- 
ton, Conch. Diet. 180; Wood, t. 46. f. 3. 
Cardium corneum, var. Montagu, T. B. 86. 
Cvclas cornea, Drap. Hist. Moll. 128. 1. 10. f. 1, 3 (not Midler) ; 
Brard, Coq. ter. et fluv. de Baris, 219. t. 8. f. 2, 3. 
C. rivicola, Leach, MSS . ; Lamk. Hist. v. 558, 2nd ed. vi. 267 ; 
Pfeiffer, L. Sf Suss. Moll. 121. t. 5. f. 3, 5 ; Turton, Bivalves, 
248. t. 11. f. 13; Man. Landfy Freshwater Shells, 12. t. l.f. 1; 
Gray, ditto, 279. 1. 1. f. 1 ; Fleming, Brit. Anim. 452 ; Jenyns, 
Trans. Carnb. P. S. iv. 294; Brown, III. Con. G. B. 93. t. 39. 
f. 16-18 ; Sow. Gen. Shells, Cyclas ; Kickx, Moll. Brab. 86; 
Desh.Enc.Meth. ii.pt. 2. 36; Sow. Conch. Man. f. Ill; Reeve, 
Conch. Syst. t. 62; Hanley, Rec. Shells , i. 89. t. 5. f. 90. 
Pisum rivicola, Blainv. Malac.; Forbes Sf Hanley, Brit. Moll. ii. 
111. t. 37. f. 1, 2. and t. Q. f. 1 (animal). 
Young, compressed, pale. 
Tellina ajquata, Sheppard, MSS. Brit. Mus. 
Cardium nux, part., Da Costa , Brit. Con. 189. 
Cardium amnicum, Dorset Cat. 32 ; Enc. Meth. Vers, t. 302. f. 5. 
a— /t. Wednesbury, Warwickshire. Presented by Mrs.Corrie. 
I — q. Surrey Canal, 
r — y. Britain. 
