178 Trans. Acad. Sci. of St. Louis. 



that time, through the courtesy of Dr. E. O. Hovey, the 

 writer has been able to examine the type specimen of the 

 species in the collections of the American Museum of Natural 

 History, and it proves to be a member of the upper yellow 

 sandstone fauna at Burlington, and not of the Chonopectus 

 sandstone. A much more perfect specimen than the type, 

 from Northview, Missouri, has been illustrated in these 

 Kinderhook Faunal Studies. I.* 



GASTEROPODA. 



Straparollus angularis Weller. 



PL XV. f. 26-27. 



A single specimen of an internal cast, in this fauna, seems 

 to be identical with the species described from the Chonopec- 

 tus sandstone as Straparollus angularis, f it being one of the 

 very few species which are common to the two faunas. 



Straparollus sp. undet. 



pi. XV. f. 25. 



A single cast of a small specimen of this undetermined 

 species of Straparollus has been observed. Only the upper 

 surface of the shell is exposed upon a slab, and this surface 

 exhibits a slight, regular convexity. About three whorls in 

 all are preserved. 



BUCANOPSIS PERELEGANS (W. & W.). 



PL XV. f. 23-24. 



Bellerophon perelegans, Bull. U. S. G. S. 153 : 144. 



Original description. "Shell small, subglobose ; umbili- 

 cus small, aperture transverse, reniform. Back and sides 

 marked by fine, sharply elevated revolving lines, which are 

 about equal to the spaces between them, finer and more 

 closely arranged in the middle than on the sides of the shell. 

 Dorsum marked by a narrow, elevated, revolving band; 

 bounded on each side by a shallow depression. The revolving 

 lines on the band are much finer than those on the body of 

 the shell. Very fine transverse striae of growth across the 



* Trans. Acad. Sci. St. Louis. 9 : 35. pi. III. f. 2. 

 t Trans Acad. Sci. St. Louis. 10: 110. 



