1895.] NATUKAL SCIENCES OF PHILADELPHIA. 85 



somewhat of the upper surface of Solarium bellastriatum ; body 

 whorl rather large, rounded, slightly flattened above, with indistinct 

 radial lines or lines of growth, flattened slightly below, rugose near 

 the umbilicus; umbilicus small, Solarium-like, rendered somewhat 

 hexagonal by the protruding peripheral dentes; mouth round; shell 

 rather thick ; general appearance like Dillwynella naticoides. 



Locality. Elm Creek, Lee Co., Tex. 



Geological horizon. Lower Claiborne Eocene. 



Type. Aldrich's collection. 



EXPLANATION OF PLATES. 



PLATE 1. 



Fig. 1. Modiola houstonia nov. sp. 



Fig. 2. Modiola texana Gabb. 



Fig. 3. Leda bastropensis nov. sp. 



Fig. 4. Leda milamensis nov. sp. 



Fig. 5. Leda houstonia nov. sp. 



Fig. 6. Adrana aldrichiana nov. sp. 



Fig. 7. Venericardia trapaquara nov. sp. 



Fig. 8a Astarte smiihvillensis nov. sp. (Typical). 



Fig. 9a, b, c. The same, small variety. 



Fig. 10. Crassatella antestriata Gabb. 



Fig. lOa The same, viewed from within. 



PLATE 2. 



Fig. 1. Crassatella texana Heilp. 



Fig. 2. Crassatella texalta nov. sp. 



Fig. 3. Crassatella trapaquara nov. sp. 



Fig. 3a The same, viewed from within. 



Fig. 4. Sphcerella anteproducta nov. sp. 



Fig. 5. Meretrix texacola nov. sp. 



Fig. 5a The same, viewed anteriorly. 



Fig. 5b Smaller variety of the same species. 



PLATE 3. 



Fig. 1. Tellina tallicheti nov. sp. 

 Fig. 2. Siliqua simondsi nov. sp. 

 Fig. 3. Ceronia singleyi nov. sp. 



