GLOSSARY, 



151 



Q. 



Quadrangular, having four right 



angles. 

 Quadriplicated, having four 



plaits. 



R. 



Radiated, furnished with rays. 



Radicated, fixed by the base to 

 another body. 



Rectangular, having right an- 

 gles. 



Recurvated, turned backward. 



Recurved, bowed back. 



Reflected, bent backward. 



Refracted, abruptly bent. 



Reniform, kidney shaped. 



Replicated, folded or plaited. 



Reticulated, formed like a piece 

 of net work. 



Retuse, ending in an obtuse 

 sinus. 



Reversed spire, see heterostro- 

 phe. 



Revolute, rolled backward. 



Ribbed, having longitudinal 

 ribs. 



Ridge, the upper part of a slope. 



Rostrum, the beak. 



Rugose, wrinkled. 



S. 

 Sanguinaceous, divided into 



chambers. 

 Scabious, rough, rugged. 

 Scalloped, indented at the edges. 

 Scuttelated, shield shaped. 

 Seam, line formed by the union 



of the valves. 

 Semi, the half. 



Semi-cordate, half heart shaped. 

 Semi-orbicular, shape of a half 



globe. 

 Semi-lunar, shape of half moon. 

 Septiform, shape of a partition. 

 Serrated, like the teeth of a saw. 

 Sessile, sitting or seated. 



Seta, a bristle. 



Setaceous, covered with bristles. 



Setiferous, bearing bristles. 



Sinister valve, is the left valve. 



Sinus, a groove or cavity. 



Siphunculus, a cylindrical per- 

 foration as in the Nautilus, 

 Spirula, &c. 



Spatulate, rounded and broad at 

 the top. 



Species, the division of a family 

 or genus. 



Spiny, thorny. 



Spinous, like a hedgehog. 



Spire, all the whorls in univalves 

 except the one in which the 

 aperture is situated, which 

 is termed the body. 



Spiral, twisted like a corkscrew. 



Squamose, scaly. 



Striated, covered with thread- 

 like lines. 



Sub, almost. 



Subarcuated, somewhat arched. 



Subconic, somewhat conical. 



Subulata, awlshaped. 



Sulcated, furrowed. 



Summit, the tip or apex. 



Suture, a hollow line of division 

 in univalves, the spiral line 

 of which separates the 

 wreaths. 



T. 



Teeth, pointed protuberances 

 within the hinge in bi- 

 valves, by which the valves 

 are united. 



Tentacula, the feelers of snails, 

 which inhabit shells. 



Tessalatcd, checquered like a 

 chess board. 



Testacea, that order of animals 

 covered with a testaceous 

 shell. 



Testaceous, consisting of car- 



