SMITHSONIAN MISCELLANEOUS COLLECTIONS 



[vol. 50 



of rather close-set cords with narrower interspaces ; there are about 

 twenty-six spirals in front of the shoulder on the last whorl ; surface 

 with a thin wash of enamel and an obscure callous ridge in front of 

 the suture ; outer lip thin, slightly expanded, strongly denticulate at 

 the edge in front ; spire elevated, but defective in the type. L,on. of 

 last whorl 62, of aperture 47, max. diam. 32 mm. 



Ripley formation of the Upper Cretaceous, at Ripley, Miss. U. S. 

 Nat. JNlus., 20,404. 



The rough surface sculpture and strong spiral threading suffi- 

 ciently distinguish this species from any of the others. 



VOLUTOMORPHA TURRICULA Dall, n. sp. 



(Figure 6 and 7) 



Fig. 7. — V. turricula Dall. y 2 . Show- 

 ing general proportions of the shell 

 and a small patch of the external 

 sculpture. Bullock's Mill, near 

 Dumas, Miss. 



Fig. 8. — V. lioica Dall. V Nearly 

 adult shell. Ripley formation at 

 Fufaula, Ala. 



Shell with the plaits as in V. eufaulcnsis; whorls about six and a 

 half, the whole shell thickly enameled ; spire elevated, slender, not 



