I 



26 SYSTEMATIC ARRANGEMENT 



2. A. ampla?, t. 19. f. 4. 



3. A. obtusa, Adams, t. 86 a. f. 1 ; Gen. Moll. t. 15. f. 7. 



4. A. cingulata. 



5. A. marginata? 



6. A. lineata. 



2. Sandella. 



Shell ovate, covered with an enamel coat, forming a broad belt on 

 the whorls, and reaching in the penultimate whorl to the back of the 

 mouth ; axis imperforate ; outer lip with an obscure tooth in front. 

 Operculum ? Animal ? 



] . S. Tankervillii. 



3. Eburna. 



Shell entirely covered with an enamel coat ; spire conical ; axis 

 deeply perforated ; outer lip with an obscure tooth. Animal and 

 operculum unknown. 



1. E. flavida. 



4. Sparella. 



Shell entirely covered with an enamel coat ; spire conical, short ; 

 axis not perforated ; outer lip often marked with an obscure tooth in 

 front. Operculum 1 



1. S. albisulcata, t. 19. f. 1, 2, 3. Fig. 12.— Teeth of Sparella Candida. 



2. S. Candida, t. 19. f. 4. 



3. S. ventricosa. 



4. S. castanea. 



5. S. aperta. 



The central tooth of S. Candida three-toothed, with smaller inter- 

 mediate denticles, the end produced, curved; the lateral tooth curved, 

 hamate, armless at the base. — Loven, t. 5. f. 11, copied (fig. 12). 



** Shell concentrically grooved, without any enamel coat; outer 

 lip thin, not toothed. 



5. Anolacia. 



Shell oblong, thin ; spire short ; outer lip thin, toothless ; aper- 

 ture large ; axis imperforate. Operculum none. Foot very large. 



1. A. mauritiana, t. 105. f. 1. 



c. Ilarpalina. Shell ventricose,variced ; pillar smooth. Operculum 

 none. 



6. Harpa. 



Shell ovate-oblong, thin, polished, with numerous acute varices ; 

 spire short, acute; last whorl very large; mouth ovate, elongate, 

 broadly notched in front ; outer lip with a thickened external varix ; 

 pillar lip simple, smooth, rounded, pointed in front. Operculum 

 none. Head large ; proboscis elongate, conical. Teeth ? Ten- 



\f W^V V 



