130 SOLEN. 



valve, and one in the other, there runs a strong rib, 

 which spreads as it proceeds across the shell, and is 

 lost near the margin ; the upper part of the muscular 

 depression is ridged, from the teeth towards the end of 

 the shell. The specimen represented in the plate 

 measures two inches from hinge to margin, and nearly 

 five inches from end to end. 



GREAT RAZOR. 



17. Solen magnus. S. testa lineari-ovali, recta, arcuato-striata, cardi- 

 nibus lateralibus bidentatis. Linn. Gmel. p. 3227. S. maximus. 



Shell linear-oval, straight, with arched striae ; hinges lateral with two 

 teeth. 



Chem. Conch. 6. pi. 5. f. 35. S. maximus. 



This shell was considered by Chemnitz as the largest 

 of the Solens, and named accordingly ; but the preced- 

 ing species being considerably larger, it was thought 

 proper to give to that the name of maximus, and to alter 

 this to magnus. 



The S. magnus is described as thin, pellucid, and 

 white, when stripped of its yellowish epidermis ; it is 

 rounded, and gaping at both ends, and the teeth of the 

 hinge do not shut into each other. It is an inch and a 

 quarter from hinge to margin, and four inches broad. 



Inhabits the shores of Nicobar, and is a very rare 

 species. 



