154 BIVALVES. 



at the other ; hinge lateral, with a single tooth in 

 one valve, and a lateral rib locking between two 

 teeth in the other, which has also a rib ; outside 

 covered with an olive brown skin striated trans- 

 versely, each stria afterwards taking a longitu- 

 dinal direction ; beneath the epidermis the shell 

 is grayish white with purplish streaks ; length 

 about one inch, breadth from one open end to 

 the other, seven or eight inches. 



This shell is common on most of our sandy 

 shores ; it is found buried a foot or more in depth 

 near low water. 



SOLEN Radiatus* 



RADIATED RAZOR SHELL. 



aecific character. Shell oval, smooth, thin, 

 3, striated concentrically; when stripped of 

 its green epidermis, it appears both within and 

 without of a delicate violet colour, with from two 

 to four white longitudinal rays, which become 

 broader towards the margin ; hinge with two 

 teeth in each valve, and a strong white depressed 

 rib extending somewhat obliquely from the hinge 

 towards the margin ; shell about an inch, or an 

 inch and quarter long, and from three to four 

 inches broad. 



It is found in the Indian Ocean. 



* Plate- VII. figures 



