OR1SMOLOGY. 275 



21. TRAPEZTFORM (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 (Cylindrical}. Whose horizontal sec- 



tions are all equal circles. PLATE XXI. FIG, 4. 



26. FUSIFORM (Fusiformis). 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 XL 

 XII. FIG. 4. 



29. CUBICAL (Cubica}. Sz,r-sided, with sides quadrate. 



30. PARALLELOPIPEDOUS (Parallelopipeda). S/cr-sided, 



with four parallelogramical and ftwo'quadrate sides. 



31. PYRIFORM (Pyriformis). Pear-shaped. Whose 



vertical section is spatulate, and horizontal circu- 

 lar. Ex. Apion, &c. 



32. INFUNDIBULIFORM (Infundibuliformis). 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. 



34. COARCTATE (Coarctata). When the diameter of 



T 2 



