262 BIVALVE SHELLS. 



Cyclas cornea (\a.r.A),Drap. Tab. des Moll. p. 105. no. 1 ; Hist. 



des Moll. de France, p. 128. no. 1. pl. 10. f. 1-3. 

 Cyclas rivicola, Leach teste Lamk. et LamJc. An. s. Vert. v. 558. 

 Blainv. Dict. Sci. Nat. xii. 279. 

 Pfeiffer, Syst. Anord. p. 121. no. 2. pl. 5. f. 3-5. 

 Turt. Conch. Ins. Brit. p. 248. no. 1. pl. 11. f. 13; Manual, 



p. 12.pl. l.f. 1. 

 Sow. Gen. of Shells, Cyclas, f. 

 Jenyns, Trans. Cambr. Phil. Soc. iv. 294. 

 Gray, Turt. Manual, ed. 2. p. 279. no. 112. pl. 1. f. 1. 

 Desh. Traite elem. de Conch. i. /12. pl. 17. f. 8-10. 

 Reeve, Conch. Syst. i. pl, 62. 

 Forbes ^ Hanley, Hist. ofBrit, Moll. ii. 111. pl. 37. f. 1,2, 



etpl. Q. f. 1. 

 Dupuy,Hist. nat. des Moll. de Fra/?ce,p.665.no. l.pl.29. f. 3. 

 Var. B. sabulicola, Krynicki, Conch. Imp. Rossici, p. 10. 

 Cyclas aequata (junior), Sheppard MSS. teste Gray, in Turt. 

 Man. ed. 2. p. 280. 



Hah. Europa; Anglia, etc. 



2. SpHuERium lacustre. B.M. 



S. testa orbiculato-rhombea, subovali vel orbiculari, compressa, 

 tenui, diapbana, tenuiter striata ; cserulescenti-alba, zona mar- 

 ginali lutescente, apice nigricanti ; natibus acutiusculis tuber- 

 culosis, aliquantisper prominentibus, subinilexis; ligamento 

 inconspicuo, 



Tellina, Berl. Mag. iv. pl. 11. f. 63? (teste Muller). 

 Tellina lacustris, Mull. Verm. Hist. ii. 204. no. 388. 



Chemn. Conch. vi. 139. pl. 13. f. 135. 

 Cardium lacustre, Mont. Test. Brit. p. 89. no, 16. 

 Cyclas calyculata, Drap. Moll. terr. etfiuv. de France, p. 130. 

 pl. 10. f. 14, 15. 



Pfeiffer, Syst. Anord. p. 122. no. 4. pl. 5. f. 17, 18. 

 Jenyns, Trans. Cambr. Phil. Soc. iv. pt. 2. p. 298. no. 3. 



pl. 19. f. 1. 

 (ex parte), Dupuy, Hist. nat. des Moll. de France, p. 672. pl. 24 . 

 f. 8. 

 Tellina tuberculata, Alten, Syst. Abhand. p. 4. pl. 1. f. 1. 

 Tellina tenera, Schrank in Gdrtner Versuch Einer Syst. p. 316. 



n. 2. 

 Cyclas lacustris, Turt. Conch. Ins. Brit. p. 249. no. 3. pl. 11. f. 18. 

 Forbes S,^ Hanley, Brit. Moll. Atlas, pl. 37. f. 7. pl. O. f. 7. 

 Tellina stagnicola, Sheppard, Trans. Linn. Soc. xiv. pt. 1. p. 150. 

 no. 2. 



