﻿AMERICAN TERTIARY AND CRETACEOUS FOSSILS. 391 



former ; where the two sets of large ones cross they are slightly enlarged ; umbilicus 

 apparently obsolete, (specimen somewhat broken at that spot.) 



Dimensions. — Length "Sin., width of body whorl -4 in., length of mouth '2 in. 



Locality. — Ripley Group, Eufala, Ala. Prof. Holmes. 



CYPR^EA, Linn. 



C. Mortoni. PI. 68, fig. 8. Ovate ; (casts) spire enveloped ; mouth finely crenate 

 on both sides ; shell widest about the middle ; no marking on the cast. 



Dimensions. — Length *65 in., width "45 in., height - 4 in. from mouth to back. 

 Locality. — Prairie Bluff, Ala., and blue marl, Burlington Co., N. J. 



CHEMNITZIA, D 'Orb. 



C. Occident ale. PL 68, fig, 10. Turrited ; whorls nine or ten ; suture deep ; 

 mouth subquadrate ; surface marked by a nodose carina around the upper part of the 

 whorls ; other markings ? • 



Dimensions. — Length 4*5 in., width of body whorl 2 in., greatest diameter of mouth 

 1*5 in. 



Locality. — Indian Territory, near the Choctaw Mission, from a deposit containing 

 Olobiconcha elevata, Shumard, Ammonites Vespertinus, Morton, and Gryphcea Pitcheri, 

 Morton. 



I was enabled to procure this species through the kindness of my friend, Dr. 

 Janeway. There is a Turritella in the collection with ■ the above species, allied to, 

 and probably identical with, T. planilateralis, Conrad. It exhibits a slight difference 

 in the arrangement of the ribs, but I shall hesitate to consider this of specific import- 

 ance. Further research may prove them to be different. Although the specimen 

 above described still retains the shell, it is so much weathered as to have obliterated 

 any fine markings which may have existed. 



LUNATIA. 



L. Halli. PI. 68, fig. 11. Elongated, subglobose, spire high ; whorls five, 

 rounded and angulated above ; mouth elliptical, umbilicus open ; surface smooth or 

 minutely wrinkled. 



Locality. — Common in the ferruginous and the black marl of New Jersey. It is 

 very rare, however, to find the shell preserved. Of fourteen specimens in my collec- 

 tion, only two show any remains of shell, and but one exhibits the surface markings. 



This species approaches N. paludinceformis, H. and M., but can be readily dis- 

 tinguished by the great difference in size, by the angulation of the whorls, the 

 markings and the open umbilicus. 



