134 SOLEN. 



and on the outside. It resembles a Tellen, but is open 

 at both ends. Length an inch and a quarter ; breadth 

 two inches and a quarter. 

 Inhabits the Red Sea. 



STRIATED RAZOR. 



24. Solen striatus. S. testa cequivalvi, transversim striata; cardinis 



dente unico. Linn. Gniel. p. 3227. 

 Shell of equal valves, transversely striated ; hinge with a single tooth. 

 Chem. Conch. 6. pi. 7. f. 57, 58. 



This shell is of an oval shape, diaphanous, very 

 fragile, and finely striated transversely ; it is of a rose 

 colour without and within, with white rays diverging 

 from the apex to the margin ; both ends are open. 



Inhabits the Nicobar Islands ; is five eighths of an inch 

 long, and about an inch broad. 



ZIG-ZAG RAZOR. 



25. Solen castrensis. S. testa cequivalvi, glaberrima, lineis triangularibus 



insignita ; car dine unidentato. 

 Shell of equal valves, very smooth, and marked with triangular lines ; 



hinge with a single tooth. 

 Chem. Conch. 11. pi. 198. f. 1935, 1936. 



A thin, pellucid, white shell, of an oval shape, gaping 

 at both ends, and very singularly marked with zig-zag 

 lines of a purple colour. The lines appear on the in- 

 side, as well as without. The shell is about three quar- 

 ters of an inch long, and an inch and a half broad. 



Inhabits the coast of Guinea. 



