146 



CONCHOLOGY. 



spire rounded into a teat ; aperture generally much longer than 

 wide and sloping anteriorly ; the right edge bent outwardly, entire 

 and soft ; the columellar edge garnished with large folds more or 

 less oblique, and slightly varying in number with age. Found 

 chiefly in the seas of the Torrid Zone. Forty-four species. 



Voluta nautica. 



V. armata. 



V^. tesselata. 



V. cymbia. 



V. proboscidalis. 



V. diadema. 



V. ducalis. 



V. Neptuni. 



V. olla. 



V. porcina. 



V. pellis-serpentis. 



V. chlorosina. 



V. polyzonalis. 



V. magnifica. 



V. Magellanica. 



V.Tulminata. 



V. scapha. 



V. mitis. 



V. Braziliana. 



V. Guinaica. 



V. undulata. 



V. festiva. 



Voluta -^thiopica. 

 V. imperialis. 

 V. vespertiUo. 

 V. musica. 

 V. levigata. 

 V. nodulosa. 

 V. ancilla. 

 V. Pacifica. 

 V. Junonia. 

 V. roelo. — -i 

 V. Hebrsea. 

 V. serpentina. 

 V. carneolata. 

 V. fulva. 

 V. nuclea. 

 V. Lapponica. 

 V. volvacea. 

 V. mitrseformis. 

 V. nivosa. 

 V. thiarella. 

 V. sulcata. 

 V. vexilla. 



4. Genus Marginella. PI. XII. 



Animal. Oval, involuted ; foot elUptical, very large, and widest 

 in front, where its edge presents a transverse furrow ; head small, 

 distinct, with two long, very sharp tcntacula, the eyes at the ex- 

 ternal part of their base ; mouth provided with a trunk. 



Shell. Smooth, polished, oval-oblong, a Uttle conical, with a 

 short mammelonated spire ; aperture somewhat narrow, slightly 

 oval on account of a light curve of the right edge, which is dilated 

 outwardly ; the columellar edge marked with three "oblique dis- 



