66 



THE NAUTILUS. 



specimens being obtained by Dr. Leighton. The type material 

 is from the lower part of the pink loess. The variety does not 

 occur (apparently) in the higher or later loess deposits of this 

 region. 



Polygyra profunda pleistocenica n. var. 



Shell uniformly smaller than typical profunda, more solid, 

 with slightly higher spire and proportionally smaller aperture 

 and umbilicus; the color bands are developed in but two speci- 

 mens of the 19 specimens examined, the majority of the indi- 

 viduals being unicolored. 



Greatest diameter, 22; height, 14.7mm. Holotype. U I 

 No. P. 751 A. 



Greatest diameter, 24; height, 14 mm. Paratype. U I 

 No. P. 751 B. 



Greatest diameter, 26; height, 14.7 mm. Paratype. U I 

 No. P. 751 C. 



This race or variety of profunda is the most common land 

 shell in the loess of the vicinity of Alton. The characteristics 

 noted above will easily distinguish it from typical profunda. 

 This variety recalls Polygyra profunda strontiana Clapp (Ann. 

 Carnegie Mus. X, p. 537, pi. xxxii, figs. 13-15, 1916), the 

 sizes being about the same in the two forms. In strontiana, 

 however, the spire is higher and the shell of different shape. 

 Pltistocenica is not common in the lower deposits of the loess 

 near Alton nor in the higher deposits. It reaches its greatest 

 development near the middle of the pink loess, from which the 

 greater number of specimens came. 



From pink loess on cliff of loess, corner Market and East 6th 

 Street, Alton, Madison Co., Illinois. 



NOTE ON A PEEOCCUPIED GENEEIC NAME IN CEPHALOPODS. 



BY S. STILLMAN BERRY, REDLAND8, CALIFORNIA. 



In 1913 (Zool. Anz., Bd. 42, p. 590) I proposed the name 

 Acroteuthis as that of a genus of cephalopods having the 

 Sepia media Linnasus 1767 as type, the said genus being 



