I 



MESALIA. 353 



Species of Torcula. 



carinifera, Lam. declivis, Adams and Reeve. 



clathrata, Kien. exoleta, Lin7i. 



cochlea, Reeve. gemmata, Reeve. 



cougelata, Adams and Reeve. Hookeri, Reeve. 



coustricta, Reeve. vittulata, Jdams and Reeve. 



Genus ZARIA, Gray. 



Shell imperforate, turreted, elongated, many-whorled, 

 solid, whorls keeled; aperture ovate, produced in front; 

 inner lip with a thin, spreading callus ; outer lip acute, 

 sinuated in the middle, produced anteriorly. 



Syn. Turritella, a, Sclium. 



Ex. Z. duplicata, LiurKBus, pi. 38, fig. 3. Shell, Z. 

 duplicata, fig. 3, a. 



The form of the mouth of the shell and the carinated 

 whorls serve chiefly to distinguish this genus, which 

 somewhat resembles Mesalia in the texture of the shell ; 

 the species are not spotted like those of Turritella. 



Species of Zaria. 



bacillum, Kien. Kaysnaensis, Krauss. 



duplicata, Linn. replicata, Linn. 



fascialis, Mke. triplicata, Stud. 



fastigiata, Adatns and Reeve. 



Genus MESALIA, Gray. 



Shell acuminately turreted, many-whorled, whorls con- 

 vex, transversely striated, the last rounded at the peri- 

 phery ; aperture orbicular, produced anteriorly into a 



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