ORISMOLOGY. 275 
21. Trapeziform (Trapeziformis). Whose horizontal 
section is a Trapezium. 
22. Trapezoidiform (Trapezoidiformis). Whose hori- 
zontal section is trapezoid. 
23. Rhombiform (Rhombiformis). Whose horizontal 
section is rhomboidal. Plate VIII. Fig. 11. 
24. Two-edged (Anceps). Whose horizontal section 
is lanceolate. 
25. Cylindrical (Cylindrica). Whose horizontal sec- 
tions are all equal circles. Plate XXI. Fig. 4. 
26. Fusiform (Fusijbrmis). Spindle-shaped. Whose 
vertical section is lanceolate or lineari-lanceolate, 
and horizontal circular. Plate XXIII. Fig. 12. 
27. Columnar (Teres). Whose vertical section is 
cuneate, and horizontal circular. Plate XVI. 
Fig. 2, 3. 
28. Claviform (Claviformis). Whose vertical section 
is clavate, and horizontal circular. Plate XI. 
XII. Fig. 4. 
29. Cubical (Cubica). Six-sided, with sides quadrate. 
30. Parallelopipedous (Parallelopipcda). Six-sided, 
with four parallelogramical and ^(/quadrate sides. 
31. Pyriform (Pyriformis). Pear-shaped. Whose 
vertical section is spatulate, and horizontal circu- 
lar. — Ex. Apion, &c. 
32. Infundibuliform (Infundibidiformis). Funnel- 
shaped. Whose horizontal sections are circular, 
at first equal and then progressively larger and 
larger. Plate XXII. Fig. 12. c. 
33. Fornicate (Fornicata). Convex above and con- 
cave beneath. Plate XIII. Fig. 18. a. 
S*. Coarctate (Coarctata). When the diameter of 
T 2 
