157 



36. S. rhomboideum, Say. 



Cyclas cornea. Lam., var. d, An. v. i)&», l»i». 



6V?rts rhomboidea, Say, J. Ac. N. S. Phila. ii, 380, 1822. 



Ovclas elegans, C. B. Adams, J. N. H. Bost. in, 330, pi. in, 



f. 11, 1840. Gould, Invert. 74, f. 55, 1841. N. H. N. 



Y. V, 224, 1843. 

 Cyclas rJiomboidea, Say, N. H. N. Y. v, 224, pi. xxv, f. 263, 



1843. Ann. Lye. N. H. N. Y. vi, Q6, pi. 1, f. 4, 1853. 

 *S'. rhomboideian, Say, Brit. Mus. Cat. Conehif. 266, 1854. 

 S. elegans, C. B. Adams, loc. sup. cit. 270, 1854. 

 ,S^. rJiomboideum, Say, Prime Cat. Corb. 9, 1863. Smith. Inst. 



Misc. Coll., Prime Monog. Corb. 39, f. 31, 1865. 



U. S. of America. 



37. S. rivicola, Lamarck. 



Chama albida, d'Argenville, Hist. Nat. Lithol. Conch. 368, 



pi. xxxi, f. 9, 1742. 

 Tellina cornea (pars), Schroter, Fluss. Conch. 189, pi. iv, f. 



4, 1779. 

 Cvclas cornea, (pars), Draparnaud, Tabl. Moll. 105, var. a, 



1801. 

 Ci/clas rivieola, Lamarck, An. v, 558, 1818. 

 Ci/clas sabulicola, Krynicki, in litt. 183 — 

 Cyclas cequata, junior, Sheppard, in litt. 1840. 

 S. riviculim, Leach, Morch. Cat. Conch. 30, 1853. 

 S. rivicola, Lamarck, Rev. Mag. Zool. 345, 1853. Mem. Soc. 



Sc. Phys. et Nat. Bord. i, 1854. Brit. Mus. Cat. Conehif. 



261. 1854. Prime Cat. Corb. 12, 1863. Europe. 



38. S. rosaceum, Prime. 



Cyclas rosacea, Prime, Proc. Soc. N. H. Bost. iv, 155, 1851. 

 S rosaceum. Prime, Brit. Mus. Cat. Conehif. 270, 1854. 



Prime, Cat. Corb. 11, 1863. Smith. Inst. Misc. Coll., 



Prime Monog. Corb. 50, f. 48, 1865. 



Schuylkill River, U. S. of America. 



39. S. Ryckholtii, Normand. 



Cyclas Byckholtii, Normand, Not. Cycl. Valenc. 7, f. 5, 6, 



1844. 

 *S'. Ryckholtii, Normand, Rev. Mag. Zool. 345, 1853. 

 S. strictum, Normand, Cycl. D^pt. Nord. 3, 1854. 

 S. Ryckholtii, Normand, Prime Cat. Corb. 12, 1863. France. 



40. S. Scaldianum, Normand. 



Cyclas Scaldia?ia, Normand, Not. Cycl. Valenc. 5, f. 1, 2, 



1844. 

 S. corneum (pars), Bourguignat, Rev. Mag. Zool. 345, 1853. 

 S. citrinum, Normand, Cycl. Dept. Nord. 1, 1854. 



