94 PROCEEDINGS OP THE ACADEMY OF 



Gyrotoma carinifera, Anthony, Proc. Acad. Nat. Sci., p. 66, Feb., 1860. 



Binney, Check List, No. 310. Brot, List, p. 27, 

 Melatoma cariniferum, Anthony, Reeve, Monog. Melatoma, t. 2, f. 13. 

 Schizostoma Showalterii* Lea, Proc. Acad. Nat. Sci., p. 93, Mar., 1860. Jour. 



Acad. Nat. Sci., t. 35, f. 49, Mar., 1863. Obs. ix. p. 68. 

 Gyrotoma Showalterii, Lea, Binney, Check List, No. 334. Brot, List, p. 28. 



2. S. castaneum, Lea. 



Schizostoma castaneum, Lea, Proc. Acad. Nat. Sci., p. 186, May, 1860. Jour. 



Acad. Nat. Sci., v. pt. 3, t. 35, f. 50. Obs. ix. p. 69. 

 Gyroloma castanea, Lea, Binney, Check List, No. 311. Brot, List, p. 27. 



3. S. ovoideum, Shuttleworth. 



Gyrotoma ovoideum, Shuttleworth, Mittheil., Bern. Nat. Gesell., No. 50, p. 88, 

 July 22, 1845. H. & A. Adams, Genera, iii. t. 32, f. 4. 



4. S. ex c i s urn, Lea.f . 



Melania excisa, Lea, Philos. Proc, p. 242, Dec, 1842. Philos. Trans, ix. 



1846. Jay, Cat., 4th edit., p. 273. 

 Schizostoma excisa, Lea, Wheatley, Cat. Shells U. S. p. 28. 

 Gyrotoma excisa, Lea, Binney, Check List, No. 317. Brot, List, p. 27. 

 Melatoma excisum, Lea, Reeve, Monog. sp. 2. 



5. S. p u in i 1 u m, Lea. 



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



Acad. Nat. Sci., v. pt. 3, t. 35, f. 57, Mar., 1863. Obs. ix. p. 74. 

 Gyrotoma pumila, Lea, Binney, Check List, No. 328. Brot, List, p. 27. 

 Schizostoma globosum,% Lea, Proc. Acad. Nat. Sci., p. 187, May, 1860. Jour. 



Acad. Nat. Sci., v. pt. 3, t. 35, f. 58, Mar., 1863. Obs. ix. p. 74. 

 Gyrotoma globosa, Lea, Binney, Check List, No. 321. Brot, List, p. 27. 

 Melatoma globosum, Lea, Reeve, Monog. t. 3, f. 18. 

 Melatoma Alabamense, Lea, of Reeve, Monog. sp. 20. 

 Melatoma Showalterii, Lea, of Reeve, Monog. sp. 23 ? 



6. S. e 1 1 i p t i c u in, Lea.# 



Melatoma ellipticum, Anthony, MSS. Reeve, Monog., t. 3, f. 21, Apr. 1861. 

 Gyrotoma elliptica, Anthony, Brot, List, p. 27. 



7. S. laciniatum, Lea. 



Schizostoma laciniatum, Lea, Philos. Proc. iv. p. 167, Aug., 1845. Philos. 



Trans, x. p. 69, t. 9, f. 57, 1853. 

 Gyrotoma laciniata, Lea, Binney, Check List, No. 324. Brot, List, p. 27. 



8. S. a m p 1 u m, Anthony. 



Gyrotoma ampla, Anthony, Proc. Acad. Nat. Sci., p. 66, Feb., 1860. Bin- 

 ney, Check List, No. 306. Brot, List, p. 27. 

 Melatoma amplum, Anthony, Reeve, Monog. t. 3, sp. 16. 



9. S. n u c u 1 u m, Anthony. 



Melatoma nucula, Anthony, MSS. Reeve, Monog. t. 3, f. 19, Apr., 1861. 

 Gyrotoma nucula, Anthony, Brot, List, p. 27. 



10. S. cylindraceu m,|| Mighels. 



Schizostoma cylindracea, Mighels, Bost. Proc i. p. 189, Oct., 1844. 



* Mi - . Reeve's figure 23 of Mdatoma ^Showalterii does not represent this species, but S.pumi- 

 tum, Lea. 



f Mr. 11 (eve an I Dr. Brot, place ovoideum, Shutt., in the synonymy of this species. As I have 

 no means of com paring specimens of the latter with Mr. Lea's species, I have preferred to sep- 

 arate them at present. S. Babylonicum is a larger, wider, more robust species. 



t The young of pumiluiit. 



g Distinguished from bulbosum, Anth., by its more lengthened form, and by the regularly con- 

 vex outline of the body whorl and spire. 



J I have not seen this specie*. 



[April, 



