128 CONTRIBUTIONS 



T. striata. Plate 4. Fig. 117. 



Description. Shell elevated above, rounded below, 

 thickly covered with transverse striae cut by minute longi- 

 tudinal striae ; substance of the shell rather thick ; apex 

 not acute ; suture impressed ; umbilicus very small ; 

 whorls six, inflated ; mouth nearly round, striate within, 

 one-third the length of the shell ; outer lip crenate. 

 Length 7-20ths, Breadth .2, of an inch. 



Observations. A beautifully ornamented and certainly 

 very interesting shell. It is closely rilled with trans- 

 verse rounded striae, having the appearance of cords, the 

 middle one of which is rather the largest. The cutting 

 striae are somewhat imbricate. Single specimens only of 

 this and the two following species have come into my pos- 

 session. This species more strongly resembles the Turbo 

 sculptus of Sowerby, than the following species do. 



T. alternata. Plate 4. Fig. 118. 



Description. Shell elevated above, rounded below, with 

 numerous transverse striae, alternately larger and smaller, 

 cut by fine longitudinal striae ; substance of the shell 

 rather thick ; apex not acute ; suture sharply impressed ; 

 umbilicus small ; whorls six, inflated ; mouth nearly 

 round, striate within, one third the length of the shell ; 

 outer lip crenate. 



Length .3, Breadth .2, of an inch. 



