290 PROCEEDINGS OE THE ACADEMY OP 



Tellina communis, Megerle. Berl. Mag. 1811. 



Cycl. nucleus, Stud. Mem. Soc. Helv. Sci. Nat. 1, p. 25, pi. 2, f. 23. 

 1837. 



C. lutea, Ziegler. Anton. Verg. 14. 1839. 



C. stagnicola, Leach. Mss. Brit. Mus. 1840. 



C. Lcachii, Ziegler. Villa. Cat. 44. 1841. 



C. tumida, Ziegler. Loc. Sup. Cit. 44. 1841. 



C. globosa, Megerle. Loc. Sup. Cit. 44. 1841. 



C. plumbeus, ?. Loc. Sup. Cit. 44. 1841. 



C. flavescens, McGillvi. Moll. Scot. 208, 246. 1844. 



Pisidium cornea, Verany. Cat. Jur. 13. 1846. 



Cycladites corneus, Kriig. Urwelt. 2, 469. Bronn. Paleont. 1, 372. 1848. 



Cycl. citrina, Brown. Conch. Grt. Brit. 132. pi. 39,' f. 37. 1849. 



C. isocardioides, Norm. Dup. Moll. 668. 1852. 



C. alala, Leach. Moll. Gt. Brit. 291. 1852. 



C.fossarum, Kryn. Bgt. Amen. 1, p. 8. 1853. 

 Hab. Europe. 



Cycl. Corsa, Charp. Mss. Is Spb. Brochonianum, Bgt. 

 Cycl. crassa, d'Orb. Prod. 2, 422. 1850. Is Cjrena crassa 

 Desh. 



21. Sph. Creplini , Dukr. Norm. Cycl. 3. 1854. 



Cycl. Creplini, Dukr. Zeit. Malak. 20. 1845. Muscul, (do.) Dkr. Ads. 



Rec. Gen. ii. 451. 1858. Pisum, (do.) Dkr. Loc. Sup. Cit. ii. 560. 



1858. 

 Hab. Europe. 



Cycl. c r o c e a , Lewis, Bost. Proc. v. 25. 1854. Is Sph. s e c u r i s , Pr. 

 Cycl. cuneata, Sowb. Edin. n. Phil. II. vii. 297. 1829. Is Pisid. 



cuneatum, Petit. 

 Cycl. cuneiformis, Sowb. Min. Conch. 2, 140, pi. 162, f. 2, 3. 1818, 



Is Cyrena cuneiformis, Fer. 

 Cycl. cy c lad if or mi s, d'Orb. Prod. 2, 381. 1850. Is Cyrena cy- 



cladiformis, Desh. 

 Cycl. cyraenopsis, Val. Encycl. pi. 301, f. 3. Is ?. 



22. Sph. Ddingoli, Bivona. Ann. N. Y. Lye. vii. 97. 1859. 



Cycl. Diingoli, Bivon. Coq. Palerm. 3. 1839. 

 Pisid. Ddingoli, Bivon. Villa. Cat. 44. 1841. 

 Hab. Sicily. 

 Cycl. Denainvilliersi, Boissy. Bull. Soc. Geol. Fr. 2d ser. iv. 



178. 1846. Is Pisid. Denainvilliersi, Desh. 

 Cycl. densata, d'Orb. Prod. 3,109. 1852. Is Cyrena den sat a , 

 Conrad. 



23. Sph. d e n t a t u m , Hald. Ads. Rec. Gen. ii. 450. 1858. 



Cycl. denlata, Hald. Ac. N. S. Phil. Proc. 1, 100. 1841. Pr. Bost 



Proc. iv. 250. 1852. 

 Hab. N. Amer. 

 Cycl. deperdita, Lam. An. Mus. vii. 421. 1806. Is Corbicula de- 



p er d i t a , Desh. 

 Cycl. depressa, Nyst. Coq. fos. Anv. 36, pi. v. f. 5, 6. Is Erycina 



depressa, Nyst. 

 Sph. D e shay esianum, Bgt. Amen. i. p. 6. 1853. Is Sph. ovale, 



Fer. 

 Sph. detruncatum, Pr. Ads. rec. gen. ii. 450. 1858. Is Sph. 



transversum, Say. 

 Cycl. diaphana, Pr. Bost. II. vi. 367. 1852. Is Sph. macul a turn , 



Morlt. 



[June, 



