OP CONCHOLOGY. 163 



S. 

 Sanguinaceous, of a blood colour, or 



resembling blood. 

 Scabrous, rough, rugged, harsh, or 



like a file. 

 Scalloped, indented at the edges. 

 Scorbiculate, pitted, having the sur- 

 face covered with hollovt's. 

 Scorbiculus, a depression or cavity. 

 Seam, the line formed by the union 



of the valves. 

 Semi-cylindrical, a cylinder cut 



throuo^h lengthways. 

 Semi-orbiculate, in the shape of a half 



globe. 

 Semi-lunar, the shape of a half moon. 

 Semi-pellucid, somewhat pellucid, 



though not fully so. 

 Serrated, like the teeth of a common 



saw. 

 Serrulated, very minutely serrated. 

 Setaceous, brisde-shaped. 

 Sinister valve, is the left valve. 

 Sinus, a groove or cavity. 



