Xiv GLOSSARY. 



Reticnhttedy like net-work. 



Retvxp, when the lower whorls are pressed into the 



body. 

 Rostrum, see Beah. 

 Ruf/oscy wrinkled, 



SeahronSf rough. 



Serrated, toothed like a saw. 



Semilunar, like a half-moon. 



Sinuous, waved. 



Sinus, a deep cut, as in the lip of the Murex Babylonius. 



Slope, the side from the beaks, [see plate w-fig. C.) 



Spinous, having prickles or thorns. 



Spire, is formed by the whole of the upper whorls: it is 

 coronated, when the outer edge of each whorl is fur- 

 nished with a row of spines. 



Stria, lines, flat or raised : they are called longitudinal, 

 when they run from hinge to margin: transverse, 

 when in a contrary direction: and concentric, when 

 they form segments of circles. 



Suhcordate, approaching the form of a heart. 



Supelluvid, not clear. 



Subulate, tapering. 



Superior, see Margin. 



Suture, a toothed joint. 



Sifphon, a prolonged tube running through the partitions 

 of chambered shells. 



Teeth, (in Univalves), angular plaits on the pillar lip 

 of V^olutes : (in Bivalves), pointed protuberances within 

 the hinge, by which the valves are united. They are 

 called: alternate, when the teeth of one valve are re- 

 ceived between the teeth of the other vahe: articn- 



