334 AMERICAN JOURNAL 



8. S. amplum, Anth. Figs. 9, 10. Ovate, smooth, ratlier 

 thick; spire conical; apes acute; suture impressed, with a 

 cord-like stria ; whorls 6 — 7, sub-convex, the last large, striate, 

 sub-cylindrical; fissure rather large, deep and waved; aper- 

 ture elliptical. Olivaceous, banded. 



Distinguished by its quadrate form. 



9. S. nuculum, ^wilA. Fig. 11. Obtusely conical; whorls 

 convex, smooth, the last large, sub-cylindrical; fissure deep; 

 aperture nari-owly ovate, a little effused at the base. Fulvous, 

 without bands. 



10. S. cylindraceum, Mighels. Cylindrical, thick, with 

 obsolete revolving undulations; spire ovate-conic; whorls 

 3 — 4, flattened, shouldered; suture distinct; aperture oval; 

 fissure deep and wide. Olivaceous. 



This species is known to me only through tlie description. 



11. S. bulbosum, ^w^A. Figs. 12, 13. Ovate, striate, rather 

 thick; spire obtusely elevated, sub-convex ; suture very dis- 

 tinct, shouldered; whorls 4, the last inflated, convex, sub- 

 angulated a little below the suture; fissure straight, very 

 narrow, not deej). Dark olive, with 3 broad bands, dusky 

 within. 



Fig. 13 is Sch. ovalis, Anth. 



12. S. curtum, Mighels. Sub-globose, short, smooth, 

 thick; spire short, obtuse, eroded; suture slightly impressed; 

 whorls, 3 — 4 remaining, flattened in the middle ; aperture 

 pear-shaped. Epidermis dark green, with ^ or 3 darker 

 bands. 



Known to me only through the description. 



13. S. glans, Lea. Fig. 14. Ovately conical, smooth, or 

 obsoletely striate, thick, inflated ; spire obtusely elevated ; su- 

 ture corded, regularly impressed; whorls 6, the last rather 

 large, elliptical ; fissure straight, narrow, deep ; aperture ra- 

 ther small, elliptical. Yellowish horn-color, or chestnut- 

 brown, obsoletely banded. 



Resembles bulbosum, Anth., but is more inflated and heavier, the color 

 is lighter, the bands narrower, and striation obsolete. 



14. S. sphaericum, Anth. Fig. 15. Sab-globose; spire 

 small, somewhat immersed; whorls smooth, very convex^ m- 

 flated. Yellowish-olive, encircled with interrupted greenish- 

 black fillets. 



15. S. pagoda, Lea. Fig. 16. Conical, strongly carinate, 

 rather thick ; spire elevated, conical ; suture much impressed ; 

 whorls 6 ; fissure small ; aperture elliptical. Dark horn-color. 



16. S. pyramidatum, Shuttl. Pyramidal, thickened, con- 

 centrically sulcately costate, frequently nodosely geniculate ; 

 whorls 5 — 6 ; fissure wide, short. Olivaceous or blackish, 

 banded with brown. 



This species is unknown to me. 



