i2 Bulletin 22 12 



Lower Claiborne Eocene. 



This shell is probably the same as figured and mentioned 

 by Dr. Dall {Trans. Wagner Free Inst. Set., vol.3, A 77, pi- 

 6, Jig. ja). It is not a Volutilithes \ not a Caricella or Lyria, 

 but has. some common characters of all. 



Sigarehis (Sigatictis) clarkensis Aldr. 

 Plate V, fig. 1 



A specimen is herewith figured that is more characteristic 

 than the type. All these forms including several called Eu- 

 naticina by Dr. Dall should be removed from Sigarehis etc., 

 as they are Niticoid as first observed by Professor Harris. 



Discohelix texana, n. sp. 

 Plate V, fig's 2, 3 



Shell small, whorls five, nucleus smooth, showing the same 

 as in Solarium ; the whorls following gradually developing three 

 rows of tubercles, those on the periphery doubled ; upper sur- 

 face flat, the space between the two keels somewhat concave 

 and smooth, the under part excavated somewhat and marked 

 with larger tubercles on the periphery besides a central row, 

 smaller and more rounded. These tubercles on the base rapid- 

 ly grow smaller and disappear before reaching the umbilical 

 area. 



Length and' breadth about 3 mm. 



Smithville, Tex. Lower Claiborne Eocene. 



Chlorostoma nautiloides, n. sp. 

 Plate V, fig's 4, 5, 6 



Shell small, whorls five, flattened above, rounded below ; 

 surface covered with fine revolving lines which are coarser on 

 the base ; ambilicus open, deep, with a revolving line proceed- 

 ing from the lower part of the aperture and revolving into the 



