NATURAL SCIENCES OP PHILADELPHIA. 299 



76. Sph. sphsericum, Anthony. Ads. Rec. gen. ii. 450, 1858. 



Cycl. sphcerica, Anth. Pr. Bost. Proc. iv. 275. 1852. 

 Hab. N. America. 



Cycl. stagnicola, Leach. Mss. Brit. Mus. 1840. Is Sph. corneum, 

 Scop. 



77. Sph. stamineum, Conrad. Ads. Rec. Gen. ii. 450. 1858. 



Cycl. staminea, Conrad. Amer. II. xxv. 342, pi. 1, f. 5, 1834. Fer. 



Mag. Zool. 1833. Dekay, 224, 1842. Jay, Cat. iv. ed. 32, 1850. Pr. 



Bost. Proc. iv. 281, 1852. Bgt. Amen. 1, p. 9, 1853. 

 Hab. N. America. 

 Sph. Steenbuchii, Moller. Ads. Rec. Gen. ii. 450, 1858. Is Pisid. 



Steenbuchii, Morch. 



78. Sph. St e en ii, Schmidt. Ads. Rec. Gen. ii. 450. 1858. 



Cycl. Steenii, Schmidt. Zeit. Malac. 118. 1850. 

 Hab. Germany. 



Cycl. striatella, Fer. Cat. 20. 1837. Collect. Mus. Paris. Is Sph. 

 maculatum, Morelet. 



79. Sph. striatinum, Lam. 



Cycl. striatina, Lam. Lam. v. 560, 1818. Lam. (Desh. edit.) vi. 271, 

 1835. Delessert pi. vii. f. 4, 1841. Bgt. Amen. 1, p. 9, 1853. Pr. 

 notes on Cycl. 1857. 



C. edentula, Say N. Harm. Dissem. 2, 1829. Fer. Mag. Zool. 1835. 

 N. Harm. Dissem. (reprint) 10, 1840. DeKay 225, 1842. Bgt. Amen- 

 1, p. 8, 1853. 



C. modesta, Pr. Bost. Proc. iv. 159, 1851. Loc. sup. cit. iv. 284, 1S52, 

 Bgt. Amen. 1, p. 8, 1853. Lewis, Bost. Proc. vi. 2, 1856. 



Sph. modestum, Pr. Ads. Rec. Gen. ii. 450. 1858. 



Musculium edentulum, Say. Loc. sup. cit. ii. 451. 1858. 



Pisum edentulum, Say. Loc. sup. cit. ii. 560, 1858. 

 Sph. s t rictu m, Normd. Cycl. 3. 1854. Is Sph. Ry ckh olti i, Normd, 

 Cycl. subdeperdita, d'Orb. Prod. 2, 305. 1850. Is Cyrena d e p e r- 



dita, Desh. 

 Cycl. subdepressa, d'Orb. Prod. 2, 381. 1850. Is Cyrena com- 

 press a, Desh. 



80. Sph. subellipticum, Meek & Hayden. 



Cycl. subelliptica, M. & H. Ac. N. 9. Phil. Proc. viii. 115. 1856. 

 Hab. N. Amer. (fossil.) 

 Cycl. sublsevigata, d'Orb. Prod. 2, 304. 1850. Is Pisid. Iseviga- 



t u m, Bgt. 

 Cycl. s u b 1 se v i s, Gldf. Petr. Germ. 2, 232, pl. 147, f. 7, a-b. 1834-40- 



Is Cyrena sublaevis, Rcemer. 

 Cycl. suborbicularis, d'Orb. Prod. 2, 304. 1850. la Corbicula 



orbicularis, Pr. 

 Cycl. subpisum, d'Orb. Prod. 3, 19. 1852. Is Sph. pisum, Math. 

 Cycl. subquadrata, Sowb. Geol. Trans. 2d ser. iv. 177, 345, pl, 



xxi. f, 8. 1836. Is Cyrena subquadrata, Morris. 

 SI. Sph. subtransversum, Pr. Proc. Zool. xxviii. 1860, 

 Hab. Mexico. 



82. Sph. subtrigonum, Dkr. 



Cycl. subtrigona, Dkr. Wald. 168, 1834. 

 Hab. Germ, (fossil.) 



83. Sph. sulcatum, Lam. 



Cycl. sulcata, Lam. Lam. v. 560, 1818. Lam. (Desh. ed.) vi. 271, 1835. 

 Fer. Mag. Zool. 1835. Fer. Cat. 20, 1837. Delessert, pl. vii. f. 3, 

 1841. Jay, Cat. iv. ed. 32, 1850. Stimp. N. E. Moll. 16, 1851. 

 Bgt, Amen. i. p. 9, 1853. Pr. Notes Cycl. 1857. 

 I860.] 



