62 



10. S. cylindra ceum, Mighels. 24. S. s alebrosura, Anth. 



S. robuslum, Anth. 



S. rectum, Anth., of Reeve. 



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



11. S. b u Ib os um, Anthony. 25. S. glandu lum, Lea. 

 S. ovalis, Anthony. 26. S. i n c i s u m, Lea. 



12. S curtum, Mighels.* S. virens, Lea. 



S. guadralum, Anthony. 

 S. obliquum, Anthony. 



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



g. Shell globose. 



14. S. s p h ae r i c u m, Anthony. * 



SPECIES. 



1. S. c ar in i f e ru m, Anthony. 



Gyro/oma carinifera, Anthony, Proc. Acad. Nat. Sci., p. 66, Feb., 1860. 



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

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

 Schizo&toma S/iowalierii,^ 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. 

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



:). S. ovoid eum, Shuttleworth. 



Gyrotoma ovoideum, Shuttle-worth, Mittheil., Bern. Nat. Gesell., No. 50, p. 88, 

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



4. S. e x c i s u m, Lea. + 



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



184^. Jay, Cat., 4th edit., p. 273. 



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

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

 Mdutoma excisam, Lea, Reeve, Monog. sp. 2. 



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



Schizosloma pumtlum, 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. 27. 

 Schizostoma alotiosum,$ 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 fflobosa, Lea, Bii.'iey, Check List, No. 321. Brot, List, p. 27. 

 Melatomtt. ylobosum, Lea, Reeve, Monog. t. 3, f. 18. 

 JUelatoma AUibamensc, Lea, of Reeve, Monog. sp. 20. 

 JUelatoma Skowalterii, Lea, of Reeve, Monog. sp. 23? 



6. S. ellipticum, Lea.|| 



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

 Gyrotoma elUplica, Anthony, Brot, List, p. 21 . 



* Synonym of bulbosum f 



f Mr. Keeve's figure 23 of Melatomz \Skowalterii does not represent this species, but S.pumi- 

 lum. Lea. 



J Mr. Reeve an 1 Dr. Brot, place ovoideum, Shutt., in the synonymy of this species. As I have 

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

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



The young of pumilum. 



|| Distinguished from bulbosum, Anth., by its more lengthece.l form, and by the regularly con- 

 vex outline of the body whorl and spire. 



