26 Cai^vin Goodrich 



Gyrotoma amplum Anthony 



PI. II, figs. 33, 34, and 35 



Gyrotoma ampla Anth., Proc. Acad. Nat. Sci., Phila., XII, Feb., i860, p. 66; 

 Binney, Check List, i860. No. 306; Brot, List, 1862, p. 27; Paetel, Cat., 1888, p. 361. 



Melatonia amplum Anth., Reeve, Monog. Melatoma, 1861, sp. 16. 



Schizostoma amplum Anth., Lewis, Amer. Journ. Conchol., V, 1869-70, p. 168; 

 Tryon, Monog. Strepom., 1873, p. 360; Lewis, Fauna of Ala., 1876, p. 22. 



Gyrotoma recta Anth., Proc. Acad. Nat. Sci., Phila., XII, Feb., i860, p. 64; 

 liinney, Check List, i860. No. 331 ; Brot, List, 1862, p. 27; Paetel, Cat., 1888, p. 362. 



Melatoma rectum Anth., Reeve, Monog. Melatoma, 1861, sp. 10. 



Gyrotoma salebrosa Anth., Proc. Acad. Nat. Sci., Phila., XII, Feb., i860, p. 

 66 ; Binney, Check List, i860. No. 333 ; Paetel, Cat., 1888, p. 362. 



Melatoma salebrosum Anth., Reeve, Monog. Melatoma, 1861, sp. 15. 



Schizostoma salebrosum Anth., Lewis, Amer. Journ. Conchol., V, 1869-70, p. 169; 

 Tryon, Monog. Strepom., 1873, p. 376; Lewis, Fauna of Ala., 1876, p. 23; Hinkley, 

 Nautilus, XVin, 1904, p. 40. 



Gyrotoma robusta Anth., Proc. Acad. Nat. Sci., Phila., XII, Feb., i860, p. 67; 

 Binney, Check List, i860. No. 332; Brot. List, 1862, p. 28; Paetel. Cat., 1888, p. 362. 



Melatoma robustum Anth., Reeve, Monog. Melatoma, 1861, sp. 14. 



G\rotoma demissa Anth.. Proc. Acad. Nat. Sci.. Phila., XII. Feb.. i860, p. 64; 

 Binney, Check List, i860, No. 316; Brot, List, 1862, p. 27; Paetel, Cat., 1888, p. 362. 



Melatoma demissum Anth., Reeve, Monog. Melatoma, 1861, sp. 9. 



Schizostoma demissum Anth., Lewis, Amer. Journ. Conchol., V, 1869-70, p. 168; 

 Tryon, Monog. Strepom., 1873, p. 372; Lewis, Fauna of Ala., 1876, p. 23. 



Schizostoma glandula Lea, Proc. Acad. Nat. Sci., Phila., XII, May, i860, p. 187; 

 Journ. Acad. Nat. Sci., Phila., V, n. s., 1862, p. 249, pi. 35, fig. 53; Obs. Gen. Unio, 

 IX, 1863. p. 71. pi. 35. fig. 53; Lewis. Amer. Journ. Conchol., V. 1869-70, p. 168; 

 Tryon, Monog. Strepom., 1873, p. 377; Lewis, Fauna of Ala., 1876, p. 23. 



Gyrotoma glandula Lea, Binney, Check List, i860, No. 310; Brot, List, i86_', p. 

 27 ; Paetel. Cat.. 1888, p. 362. 



Schizostoma Hartmanii Lea, Proc. Acad. Nat. Sci., Phila., XII, May, i860, p. 

 187 ; Journ. Acad. Nat. Sci., Phila., V, n. s., p. 247, pi. 35, fig. 51 ; Obs. Gen, Unio, IX, 

 1S63, p. 69, pi. 35. fig. .51. 



Gyrotoma Hartmanii Lea, Binney, Check List, i860. No. 322; Brot, List, 1862, p. 

 27 ; Paetel, Cat.. 1888, p. 362. 



Melatoma nucula Anth., MSS., Reeve, Monog. Melatoma, 1861, sp. 19. 



Gyrotoma nucula Anth., Brot, List, 1862, p. 27 ; Paetel, Cat., 1888, p. 362. 



Schizostoma nuculum Anth., Lewis. Amer. Journ. Conchol.. V, 1869-70, p. 169 ; 

 Tryon, Monog. Strepom., 1873, p. 361 ; Lewis, Fauna of Ala., 1876, p. 23. 



Schizostoma Showalterii Lea, (non Lea, i860), Proc. Acad. Nat. Sci., Phila., XYI, 

 1864, p. 112; Journ. Acad. Nat. Sci., Phila., VI, 1866, p. 149, pi, 22,, fig. 56; Obs, 

 Ccn. Unio, XI, 1867. p. 106 ; pi. 23, fig. 56. 



Schizostoma 'jShomalteriatta "Lea", Tryon, Amer. Journ. Conchol., I, Oct., 1865, p. 

 335 ; Tryon. Monog. Strepom., 1873. P. 375 ; Lewis. Fauna of Ala.. 1876. p. 23. 

 Schizostoma constrictum Lea, Hinkley, Nautilus, XVIII, 1904, p. 40. 

 Gyrotoma oliviila excisa (Lea). Hannibal, Proc. Malacol. Soc, X, 1912, p. i8r. 

 Gyrotoma laeta incisa (Lea). Hannibal, Proc. Malacol. Soc, 1912, p. 182. 



Description : Shell smooth, ovate, rather thick, olivaceous ; spire not elevated, 

 but acute; whorls 6-7, subconvex; sutures well defined; fissure broad, rather deep 

 and waved ; aperture moderate, elliptical, flesh-colored and banded within ; cokmiella 



