62 



10., S. cylindra ceum, Mighels.- 24. S. s alebr osum, Anth. 



S. robu.tlum, Anth. 

 S. rectum, Anth., of Reeve. 



f. Shell ovate, whorls obliquely flattened, spire obtuse. 



11. S. b u lb osum, Anthony. 25. S. glandu lum. Lea. 

 S. ovali.1, Anthony. 26. S. i n c i su m. Lea. 



12. S curt urn, Mighels.* S. virens, Lea. 



S. quadratum, Anthony. 

 S. obliquum, Anthony. 



13. S. g 1 a n s, Lea. 



g. Shell globose. 



14. S. s p h £B r i c u m, Anthony. 



SPECIES. 



1. S. c a rin i fe rum, Anthony. 



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 Shoicalterii,f Lea, Proc. Acad. Nat. Sci., p. 93, Mar., 1860. Jour. 



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

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



2. S. c a s t a n e u m. 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. 

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



3. S. o V i d e u m, Shuttleworth. 



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

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



4. S. excisum, Lea.j 



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



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

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

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

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



5. S. p u mi 1 u m, Lea. 



Schizostoma pvmdum, 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 piimila, Lea, Binney, Check List, No. 328. Brot, List, p. 2 7. 



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 ylohosa, Lea, BiL«aey, 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 11 i p t i c u m, Lca.|| 



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

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



* Synonym of bulbostim f 



t Mr. Reeve's figure H oi Melatoma \Showall(rii diWi noi represent this species, but S.pumi- 

 Iwn. Lea. 



I .Mr. Reeve an 1 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. BabyUmicum is a larger, wider, more robust species. 



3 The young of p«;nii«ni. 



(DistinguiKhed from buWosum, Anth., by its more lengthoaed'form, and by the regularly con- 

 vex outline of the body whorl and spire. 



