OF CONCHOLOGY. 3oo 



10. S.CYLINDKACEUM,Migbels. 24. S. SALEBKOSUM, Antll. 



jS. rohiistum., Anth. 

 S. rectum^ Anth., of Reeve, 

 f. Shell ovate, whorls ohliquely flattened^ spire obtuse. 



11. S. BULBOSUM, Anth. 25. S. glandulum, Lea. 



S. ovalis, Anth. 26. S. incisum, Lea. 



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



S. quadratum, Anth. 

 S. ohUquum, Anth. 



13. S. GLANS, Lea. 



g. Shell globose. 



14. S. SPH^RICUM, Anth. 



1. S. cariniferum, A7ith. Figs. 1, 2. Cylindrically-conic, 

 transversely distantly ribbed, thick ; suture impressed ; whorls 

 7, flattened; fissure large and deep; aperture small, elliptical. 

 Chestnut, banded within. 



Fig. 1 is from the type ; Fig. 2 represents Showalterii, Lea. 



2. S. castaneum, Lea. Fig. 3. Conical, carinate, rather 

 thick ; spire exserted, strongly carinate just above the suture ; 

 suture much impressed ; whorls 6, flattened, the last slightly 

 convex, obsoletely angular and 2-ribbed at the periphery; 

 fissure straight, narrow and deep ; aperture small and ellipti- 

 cal. Dark brown, 4-banded, 



3. S. OVOideum, Shuttl. Fig. 4. Conoidal, thick, concen- 

 trically striate-costate ; whorls 5, thickened at suture; fissure 

 very long and narrow. Olivaceous, brown-banded. 



4. S. excisum, Lea. Fig. 5. Sub-fusiform, rather thick, 

 striate; spire ovately conical; suture impressed; whorls flat- 

 tened; fissure long and narrow. Yellowish, banded. 



5. S. pumilum, Lea. Figs. 6 — 8. Top-shaped, striate, 

 rather thin; spire obtusely conical; suture impressed ; whorls 

 6, ventricose, the last very large ; fissure straight and rather 

 short ; aperture rather small, angular and somewhat channelled 

 at the base. Pale horn-color, sometimes 3 -banded. 



Fig. 6 is typical ; Fig. 8 is Sch. globosa, Lea. 



6. S. ellipticum, Anth. Oblong-ovate; spire rather pro- 

 duced, obtuse; whorls flatly convex, smooth, faintly rudely 

 plicated towards the apex ; fissure deep ; aperture narrow- 

 ovate. Yellowish-olive, with 3 broad dark bands. 



7. S. laciniatum, Lea. Obtusely conical, smooth, rather 

 thick; spire obtuse; suture excavated; whorls convex; fissure 

 deep; aperture elliptical. Yellowish horn-color^ banded. 



* Synonym of hulhosiimf 



