12 



Shell ovate, smooth, outer margin thickened, aperture 

 nearly entire. 



Locality. 



DIVISION III. Shell ovate, smooth, spire fiat, aperture effuse, linear. 



DIVISION IV. Shell subcylindrical, enamelled and emarginated. 

 Family 1st. Spire rather obtuse. 



do. 



Porphyrea, 

 Erythrostoma, 



Oliva, 



Ventricosa, 



W. Indies, S. America. Incrassata, Brazils, 



Amboyna, Mauritius, So. Pinguis, Brazils. 



Seas. Tigrina, Eastern Ocean, 



do. Brazils, E. W. Ind. Cameola, Moluccas. 



South Seas. Micans, do. Mauritius. 



Mendana, Moluccas. 



Family 2d. Spire prominent or conical. 



West Indies. 

 Philippine Isles. 



do. Moluccas, Mauritius. 



DIVISION V. Shell fusiform, generally striated or ribbed, either longitu- 

 dinally or transversely. 



Family 1st. Spire less than half the length of the shell. 



