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. 
Cyclasidse, D’Orbigny, Voy. Amer. Merid. ; Geinitz. 
Veneriadse, part., Leach, 1818; Ann. Sf Mag. N. H. xx. 272. 
1. SPHiERIUM. 
Sphserium (cornea), Scopoli, Introd. N. Hist. 397, 1777 (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. 
Cyclas, sp. Brug. Ency. Meth. 301, 1792; Lamk. Sys. A. s. V. 
123, 1801; not Klein, 1753; Leach, 1818. 
Corneocyclas, Ferussac in Blainv.Dict. Sci. Nat. xii. 277, 1818. 
Cyglas, Oken, Lehrb. Nat. (error of press). 
Cyclas, Pfeiffer, Naturg. i. 123, ii. 3, 1822; Nilsson, Moll. Suec. 
95. 
1. Sphjsrium rivicole. 
Tellina cornea /3, Maton Sf Racket, Linn. Trans, viii. 59 ; Tur- 
ton, Conch. Diet. 180; Wood, t. 46. f. 3. 
Cardium corneum, var. Montagu , T. B. 86. 
Cyclas cornea, Drap. Hist. Moll. 128. t. 10. f. 1, 3 (not Muller ) ; 
Brard, Coq. ter. etfluv. de Paris, 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. 1 1 . f. 13 ; Man. Land Sf Freshwater Shells, 12. 1. 1. f. 1; 
Gray, ditto, 279. t. 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 sequata, 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 — k. Wednesbury, Warwickshire. Presented by Mrs. Corrie. 
/ — q. Surrey Canal. 
r — y. Britain. 
