160 



Sph. striatinum, Lamarck, Proc. Ac. N. S. Phila. 405, 1861. 

 Prime Cat. Corb. 9, 1863. Smith. Inst. Misc. Coll., 

 Prime Monog. Corb. 37, f. 29, 1865. North America. 



49. S. subtransversum, Prime, Proc. Zool. Lond. xxviii, 



322, 1860. Smith. Inst. Misc. Coll., Prime Monog. 

 Corb. 52, 1865. Mexico. 



50. S. tenue, Prime. 



^Ct/clas tenuis, Prime, Proc. Soc. N. H. Bost. iv, 161, 1851. 

 ■■Sph. tenue, Prime, H. and A. Ad., Gen. Rec. Moll, ii, 450, 

 1858. Prime Cat. Corb. 11, 1863. Smith. Inst. Misc. 

 Coll., Prime Monog. Corb. 17, f. 44, 1865. 



U. S. of America. 

 Si, S. Terverianuin, Dupuy. 



Oyclas Terveriana, Dupuy, extram. Gall. test. 87, 1849. Du- 



puy Hist. Moll. Tr. 674, pi. xxix, f. 9, 1852. 

 S. Terverianum, Dupuy, Rev. Mag. Zool. 135, 1853, Mem. 

 Soc. Sc. Phys. Bord. i, 1854. Prime, Cat. Corb. 12, 

 1863. France. 



52. S. transversum, Sav. 



Oyclas transversa, Say, N. Harm. Dissem. 356, 1829. 



Cyclas detruncata, Prime, Proc. Soc. N. H. Bost. iv, 155, 

 1851. 



Cyclas gracilis, Prime, Loc. sup. cit. iv, 156, 1851. 



Cyclas constricta, Anthony, Loc. sup. cit. iv, 274, 1852. 



Sph. transversum. Say, Brit. Mus. Cat. Conchif. 267, 1854. 



Sph. gracile, Prime, Loc. sup. cit. 268, 1854. 



Sph. detruncatum. Prime, Loc. sup. cit. 272, 1854. 



Sph. transversum, Say, Proc. Ac. N. S. Phila. 31, 1862. 

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

 Prime Monog. Corb. 48, f. 45, 1865. U S. of America. 



53. S. triangulare, Say. 



Cyclas triangularis, Say, N. Harm. Dissem. 356, 1829. 



Sph. triangulare, Say, Proc. Ac. N. S. Phila. 28, 1862. 

 Smith. Inst. Misc. Coll., Prime Monog. Corb. 36, f. 28, 

 1865. Mexico. 



54. S. truncatum, Linsley. 



Cyclas calyculata, Draparnaud, C. B. Ad., Amer. J. Sci. xl, 

 277, 1841. C. B. Ad., Vermont, 18, 1842. C. B. Ad., 

 Cat. 29, 1847. 



Cyclas truncata, Linsley, Amer. J. Sci. n. ser. vi, 234, f. 3, 

 1848. 



Cyclas pellucidea, Prime, Stimp. Moll. N. E. 16, 1851. 



