132 



THE NAUTILUS. 



between grooves, which are eight or ten in number, the nodules fading 

 away as the canal is reached, but in the type specimen the nodules 

 are present over the whole of the smooth part without, however, any 

 grooves between. Anal notch rather deep, and marking the spire 



with its former positions; outer lip thin, pillar lip straight with a 

 very slight twist ; aperture straight above, widening near the base. 



Length 20 mm., max. diameter 12 mm. 



Locality : Shoal Creek, Walton county, Florida. 



Remarks : This shell bears a close resemblance to Conns puncti- 

 culatus Hwass, and is doubtless an ancestral form, thus adding an- 

 other link to the chain of evidence of a connection between the At- 

 lantic and Pacific Oceans during Tertiary times. 



This species has been in my possession for many years and until 

 lately was not known to me from any other locality, but on looking 

 over some specimens of fossils from the Number 2 well of the Mobile 

 Oil Co., bored near Mobile, Alabama, I found two or three speci- 

 mens of it, and from its position over three hundred feet above the 

 Oak Grove (Fla.) horizon in this well, it would seem to indicate that 

 this deposit on Shoal Creek is much younger than the Oak Grove 

 beds. The assignment of these beds to the Oligocene must, in the 

 writer's opinion, be better substantiated than at present. There are 

 so few species common to the " Chipola" of Ball and the Vicksburg 

 formation, it would seem better to confine the use of the term " Olig- 

 ocene " to the latter, which is in accordance with Conrad's original 

 diagnosis, and put the Chipola, Shoal Creek and Chattahoochie beds 

 into one formation, calling them all Miocene, and if this should 

 eventually be done, then this formation should bear the name its 

 discoverer, D. W. Langdon, Jr., gave it of " Chattahoochie." 



D. G. Harris figures a Conus puncticulatus Hwass from the Gal- 

 veston deep well. It is probably the same species as the one herein 

 described. The pustules on the living shell appear to be in the 

 grooves while on the fossil form they are between them. 



