10 THE NAUTILUS. 



timions over the body, and much thickened behind ; pillar straight, 

 with three strong plaits, canal shallow, short ; suture distinct, sur- 

 face smooth except for very fine incremental and revolving lines ; 

 outer lips broken, but apparently simple and sharp. Length 50, 

 max. breadth about 38 mm., diameter of umbilical funnel about 

 20 mm. 



Horizon : Claibornian Eocene of Richmond Co., Ga. 



This singular shell has very much the aspect of Pyrula smitltii 

 Lea (Lacinia alveata Conrad), Contr. to Geology, pi. v, fig. 1G2 ; 

 but has a lower spire, and is wider and rounder at the shoulder, be- 

 side having the strong plaits on the pillar which do not exist in 

 Lacinia. It will be illustrated in a forthcoming publication. Mean- 

 while collectors should be on the lookout for it. 



NEW VARIETIES OF AMERICAN LIMNJEAS. 



BY FRANK COLLINS UAKER. 



LimncEQ. reflexa iowaensis var. nov. 



Shell thin, with a short, dome-shaped spire; whorls 5 5-jL, rather 

 flat-sided, loosely coiled; suture well marked but not profound; 

 aperture with the characteristic turret of typical reflexa, with a heavy 

 plait extending across the columellar callus ; spire and aperture of 

 equal length ; color dark horn, either plain or with spiral or longitu- 

 dinal zebra-like markings ; aperture marked internally by several 

 longitudinal red bands, indicating the position of former peristomes ; 

 umbilicus covered. 



Length 28.50, width 12.00, aperture length 13.50, width 7.00 mill. 



Length 30.00, width 11.50, aperture length 15.00, width 7.00 mill. 



Length 26.50, width 11.50, aperture length 14.00, width 7.50 mill. 



Length 26.00, width 11.00, aperture length 12.00, width 6.00 mill. 



This peculiar variety was found in a collection recenlty sent to the 

 writer for study, by Mr. Bryant Walker. It differs from all forms 

 of this species in having the spire and aperture of equal length, in 

 the peculiar dome-shaped spire and in the general robust appear- 

 ance. 



In the Illinois and Michigan Canal, at Joliet, this variety is found 

 and shows a perfect gradation from the short, stumpy variety, with 



