140 



P. Babylonia. The Tower of Babel Pleurotoma. PL 

 24, fig. 1. 



Species in which the tube is rather long, and the notch is 

 a little posterior to the middle of the edge. 



P. auriculifera. The eared Pleurotoma. 

 Species in which the tube is short, and the notch entirely 

 against the spire. 



P. nodifera. The knotty or Javanese Pleurotoma. 



Species with outer lip largely notched and deeply crenu- 

 lated ; upper volution smooth ; under volution and body 

 striated transversely, with angulated oblique nodules at the 

 suture ; colour reddish yellow. 



3. Turbinella. Twenty-three species. 



By Linnaeus this genus was classed with the Voluta, 

 though they are more closely allied to the Murex ; differing, 

 however, from them by having no varices. 



Shell generally turbinated, but sometimes turreted, rug- 

 ged, and thick ; spire variable in form ; aperture elongated, 

 terminated by a straight canal, often rather short ; the left 

 edge almost straight, and formed by a callosity which hides 

 the columella ; the right edge entire and sharp ; the colu- 

 mella with two or three unequal, almost transverse plaits. 



Turbinella scolymus. Turbinella leucozonalis. 



T. rapa. T. rustica. 



T. napus. T. cinguhfera. 



T. pyrum. T. polygonia. 



T. pugillaris T. carinifera. 



