45 LioxiTic Stage 45 



by raised spiral lines and by ev^en lines of growth ; body 

 whorl in the type specimen very poorly preserved, but showing 

 few signs of costse ; columella ponderous. 



^'Locality. — Smithville, Bastrop county, Texas. 



''Geological horizon. — Lower Claiborne Eocene. 



' ' Type — Texas State Museum. ' ' 



This species, unlike C. /iiiinerosKs, runs up to a fairly sharp 

 apex. Its penultimate and body whorls closely resemble C. 

 2 'icksb urgen sis. 



Lignitic localities. — Alabama: Woods bluff ; Nanafalia. 



Specimens figured. — Paleontological Museum, Cornell Univer- 

 sity. 



Latirus tortilis, var. nanafalius, nov. var., PI. 5, fig. 9. 



This differs from typical tortilis of the Midway, (see Bull. Am. 

 Pal. vol. I, p. 203), by having a .shorter spire, more pointed 

 spines and only one very faint raised line on the columella 

 representing apparenth' the upper faint one in tortilis. The 

 peculiar microscopic markings on the exterior, caused by the fine 

 lines of growth becoming somewhat imbricate as they pass over 

 spirals, is alike in both forms and leads one in.stinclively to group 

 the two together, though they diflfer considerably in form. 



Locality. — Alabama : Nanafalia. 



Type 0/ variety. — Paleontological Museum, Cornell Univ. 



Siphonalia, sp., No. i, PI. 5, fig. 10. 



Siphonalia, sp., No. 2, PI. 6, fig. i. 



The fa<5l that our Claiborne Eocene fossils were first to be 

 described makes our stratigraphic treatment of the Eocene 

 fauna, from Midway upwards, occasionally very difficult. Many 

 short, semi-fusiform shells were described by Lea and Conrad 

 from Claiborne whose .synonymies have been and perhaps ever 

 will be in doubt. Here are doubtless ancestral types of one or 

 more of those forms ; but we must postpone giving final names 

 to them until their Claiborne and Lower Claiborne allies have 

 been most carefullv studied. 



