NATURAL SCIENCES OP PHILADELPHIA. 97 



26. S. i n c i s u m,* Lea. 



Anculosa (Schizo stoma) incisa, Lea, Philos. Proc, ii. p. 243, Dec., 1842. 



Philos. Trans, ix. p. . 



Schizostoma incisa, Lea, Wheatley, Cat. Shells, U. S. p. 28. Hanley, Conch. 



Misc. Melania, t. 5, f. 44, 45. 

 Gyrotoma incisa, Lea, Binney, Check List, No. 323. Brot, List, p. 27. 

 Melatoma incisum, Lea, Reeve, Monog. sp. 4. 

 Melania incisa, Lea, Jay, Cat., 4th Edit., p. 274. 

 Leptoxis incisa, Lea, Binney, Check List, No. 363. Haldeman, Monog. p. 2, 



t. 1, f. 2426. 

 Gyrotoma quadrata, Anthony, Proc. Acad. Nat. Sci., p. 65, Feb., 1860. 



Binney, Check List, No. 330. 

 Melatoma qaadratum, Anthony, Reeve, Monog. fig. 7, b, (not 7 a, or 8). 

 Schizostoma virens, Lea, Proc. Acad. Nat. Sci., p. 187, 1860. Jour. Acad. 



Nat. Sci., v. pt. 3, t. 35, f. 59. Obs. ix. p. 75. 

 Gyrotoma virens, Lea, Binney, Check List, No. 335. Brot, List, p. 28. 

 Gyrotoma obliqua, Anthony, MSS. 



Species unknown to me. 



Gyrotoma conica, Shuttleworth, (ubi) Brot, List, p. 27. 



3d Section : aperture entire and rounded below. 



Genus ANCULOSA, Say. 



Anculosa, Say, Jour. Acad. Nat. Sci., ii. p. 178, Nov. 1821. Conrad, Am. Jour. 

 Sci. xxv. p. 342, 1834. Muller, Syn. Test. Viv. p. 39, 1836. Swainson, 

 Manual Malacol. 1840. Haldeman, Suppl. to Monog. Limniades, Oct. 

 1840. Sowerby, Conch. Manual, Edit. 2, p. 66, 1842. Wheatley, Cat. 

 Shells U. S. p. 27, 1845. Lea, Philos. Trans, ix. p. 14, 1846. Anthony, 

 Proc. Acad. Nat. Sci. p. 67, Feb. 1860. 



Anculosa, Conrad, Hermannson Indices Gener. Malac. i. p. 51, 1846. 



Anculotus, Say, Jour. Acad. Nat. Sci., v. pt. 1, p. 128, Aug. 1825. Conrad, New 

 Fresh Water Shells, p. 62, 1834. Couthuoy, Bost. Jour. ii. p. 184, Feb. 

 1839. Anthony, Bost. Jour., iii. p. 278, Jan. 1840. DeKay, Moll. N. York, 

 p. 101, 1843. Chenu, Bibl. Conch, i. iii. Conrad, p. 26, 1845. Gray, Ge- 

 nera, Zool. Proc. xv. p. 153, 1847. Woodward, Manual, i. p. 131, 1851. 

 Jay, Cat. 4th Edit., p. 276, 1852. Reeve, Conch. Iconica, Sept. 1860. 



Ancylotus, Say, Hermannson, Indices. Gen. Mai. i. p. 51, 1846. 



??Leptoxis, Rafinesque, Journ. de Phys. lxxxviii. p. 424, 1819. Haldeman, Mo- 

 nog. Lept. H. & A. Adams, Genera, i. p. 307, Feb. 1854. Chenu, Man. 

 de Conchyl. i. p. 294, 1859. Binney, Check List, p. 10, June, 1860. Brot, 

 List, p. 23, 1862. 



Mudalia, Haldeman, Suppl. to Monog. Limn., Oct. 1840. 



Nitocris, H. & A. Adams, Genera, i. p. 308, Feb. 1854. 



1. Nodulous species. 



1. A. A nth o nyi, Budd. 



Anculosa Anthonyi, Budd, Redfield, Ann. Lye. N. Hist., vi. p. 130, t. 1, f. 6. 



Apr., 1854. 

 Leptoxis Anthonyi, (Budd) Redfield, Brot, List, p. 23. Binney, Check List, 



No. 341. 

 Anculotus Anthonyi, (Budd) Redfield, Reeve, Monog. Anc. t. 2, f. 17. 



2. A. p 1 i c a t a, Conrad. 



Anculotus plicatus, Conrad, New Fresh water Shells, p, 61, t. 8, f. 18, 1834. 



* Mr. Lea, (Obs. ix. p. 67), considers quadratum, Anth., to be a synonym of his 8. ineisum, in 

 which decision I entirely agree with him. To these I unite S. virens, Lea, which 1 find to be the 

 young shell of the same species. 



1864.] 7 



