1895.] NATURAL SCIENCES OF PHILADELPHIA. 83 



(the only known specimen) as indicated by the figure; number of 

 whorls unknown, ornamented by (1) fine even spiral strije, (2) a 

 8ubsutural row of pustules or crenules, and (3) a slightly raised or 

 faint ridge at the base of each whorl becoming obsolete in the lower 

 whorls, but increasing in strength above so as to nearly equal in size 

 the subsutural line of crenules. 



Locality. — Black Bluff, Brazos River, extreme northern limit of 

 Milam Co., Milam Bluff of Penrose's Report. 



Geological horizon. — Midway Eocene. 



Type. — Texas State Museum. 



Genus SOLARIUM. 

 Solarium huppertzi nov. sp. PI. 9, fig. 10, a. 



Specific characterization. — Size and general form of young speci- 

 mens (no adults have thus far been found) as shown by the figure; 

 whorls 3; mouth roughly hexagonal, bounded by the following lines: 

 (1) the upper margin of the whorl, extending from a bicrenulate 

 suture to a peripheral row of crenulations; (2) the exterior lateral 

 margin of the whorl-, extending from the row of crenulations just men- 

 tioned to a second or medial row; (3) the exterior sublateral margin 

 of the whorl, extending from the medial row of crenulations to the 

 basal row; (4) the basal margin of the whorl, extending from the 

 basal row of crenulations to an interior sublateral row; (5) the um- 

 bilical margin; (6) the margin of contact with the penultimate 

 whorl. 



This shell is flat or discoid like the younar of most members of this 

 genus. 



Locality. — Smithville, Bastrop Co., Tex. 



Geological horizon. — Lower Claiborne Eocene. 



Type. — Texas State Museum. 



Solarium bastropensis nov. sp. PI. 9, fig. 11. a. 



Specific characterization. — Size and general form as indicated by 

 the figure ; whorls -M ; spire very low, marked only by the suture 

 and a fine line just above it; body whorl depressed, somewhat cari- 

 nate, marked on the periphery by three raised lines, and near the 

 umbilicus by radiating lines of growth. 



Locality. — Smithville, Bastrop Co. , Tex. 



Geological horizon. — Lower Claiborne Eocene. 



Type. — Texas State Museum. 



