PLATE XVI. 



FIG. I. 

 NERITA PALLIDULUS. 



PALE NERIT. 

 GENERIC CHARACTER. 



Globose. Aperture semiorbicular, 



SPECIFIC CHARACTER 



Semitransparent. Wreaths rather prominent. Mouth semilunar^ 

 very patulous. Umbilicus large. 



Nerita Corneus, spira paululum exserta. Pallidums Da Costa, p. 51. 

 Sp. 29. 







■ 



Da Costa says " This species is rare, for I have only received 

 some few shells from the coasts of Kent and Dorset." He also con- 

 siders it an undescribed shell. 



