176 



GLOSSARY. 



Sub-conic, somewhat conical. 



Sub-diaphanous, somewhat transpar- 

 ent or clear. 



Subrotund, nearly globular. 



Subulate, awl-shaped. 



Sulcated, furrowed. 



Sulci, furrows or ridges. 



Summit, the tip or apex. 



Suture, a hollow line of division in 

 univalve shells, the spiral line of 

 which separates the wreaths. 



Tentaciila, the feelers of snails, which 

 inhabit shells. 



Tesselated, chequered like a chess 

 board. 



Testacea, the third order of worms, 

 including those which are covered 

 with a testaceous shell. 



Testaceous, consisting of carbonate of 

 lime and animal matter. 



Tetragonal, four cornered. 



Torose, swelling into knobs or protu- 

 berances. 



Tortuosity, wreath, flexure. 



Tortuous, twisted, wreathed, winding. 



Transverse, placed across, or cross- 

 ways. When the breadth of a shell 

 is greater than its length, it is called 

 trausverse. 



Trapeziform, shaped like a trepezium. 



Trigonal, having three angles. 



Truncated, stunted, cut short or ab- 

 ruptly ofta^ the end. 



Tubercle, a little knot or pimple. 



Tuberculated, knotted, pimpled. 



Tuberosities, promiueut kuots or ex- 

 crescences. 



Tubular, in the shape of a hollow 

 tube. 



Tubulate, tubulous or hollow. 



Tunicated, coated. 



Turbinated, shaped like a top or pear. 



Turgid, swollen. 



U & V. 



Valve, the whole of univalve shells, or Zigzag, havin;,' contrary turnings a.ud 



shells in one piece ; and the half of windings, 



bivalves, or shells iu two divisions, Zoned, surrounded witli one or more 



&ic, girdles. 



Varices, longitudinal ribs in univalve 

 shells. 



Variety, is when one species ditfisrs 

 some little degree from that of an- 

 other. 



Vaulted, like the roof of one's mouth. 



Venter, the belly, situated in the body 

 of the shell ; being the most promi- 

 nent part, when the aperture is 

 turned to the observer. 



Ventral, belonging to the belly. 



Ventricose, inflated, swelled in the 

 middle. 



Vermiform, worm-shaped. 



Vertex, in the Patella the top or most 

 prominent part, situated iu general 

 nearly in the middle. In the genus 

 Bulla it is used for the apex. 



Verrucose, war ted. 



Verticulated, whorl ed. 



Umbilicated, having a depression in 

 the centre like a navel. 



Umbo, in bivalve shells, the round part 

 which turns over the hinge. 



Umbonate, bossed, having a raised 

 knob in the centre. 



Undulated, waved, having a waved 

 surface. 



Untfulate, shaped like a horse's hoof. 



Unilocular, witli a single chamber or 

 compartment. 



Univalve, shells consisting of one valve, 

 or piece. 



Volutions, the wreaths, or turnings of 

 the shells of univalves. 



Urceolate, swelling in the middle like 

 a pitcher. 



Vulva, a spatulated mark iu several 

 bivalve shells ; formed when the 

 valves are united on the posterior 

 and anterior slopes. 



W. 



Whorl, one of the wreaths or turnings 

 of the spire of univalves. 



