86 PROCEEDINGS OF THE ACADEMY OF [1895. 



Fig. 3a Smaller individual of the same species. 



Fig. 4. Periploma collardi nov. sp. 



Fig. 5. Corbula aldrichi, var. smithvillensis nov. var. 



Fig. 5a The same, lesser value. 



Fig. 6. Martesia texana nov. sp. 



Fig. 7. Ringwula trapaquara nov. sp. 



Fig. 8. Volvula f smithvillensis nov. sp. 



Fig. 9. Cylichnella atysopsis nov. sp. 



Fig. 9a The specimen labelled "Volvula minutissima" in the 



collection of the Academy. 

 Fig. 10. Terebra texagyra nov. sp. 

 Fig. 11. Terebra houstonia nov. sp. 



PLATE 4. 



Fig. 1. Terebra houstonia var. 



Fig. 2. , Conus smithvillensis nov. sp. 



Fig. 3. Pleurotoma enstricrina nov. sp. 



Fig. 4. PI. (Pleurotomella) anacona nov. sp. 



Fig. 5. PL (Sureula) gabbi Conrad. 



Fig. 6. PL (Sureula) moorei Gabb. 



Fig. 6a A somewhat larger, more carinated specimen. 



Fig. 6b A strongly denticulate specimen. 



Fig. 7. Pleurotoma beadata nov. sp. 



Fig. 8. Pleurotoma vaughani nov. sp. 



Fig. 9. Pleurotoma huppertzi nov. sp. 



Fig. 10. PL huppertzi, var. penrosei nov. var. 



PLATE 5. 



Fig. 1. Pleurotoma leoncola nov. sp. 



Fig. 2. PL (Drillia) dumblei nov. sp. 



Fig. 3. PL (Drillia) dipta iiov. sp. 



Fig. 4. PL (Drillia) nodocarinata Gabb. 



Fig. 5. PL (Drillia') prosseri nov. sp. 



Fig. 6. PL (Drillia) kellogi Gabb. 



Fig. 7. PL (Drillia) texacona nom. mut. 



Fig. 8. PL (Drillia) texanopsis nov. sp. 



Fig. 9. Pleurotoma insignifica Heilp. 



Fig. 10. PL (Mangilia) infans Mr. 



