270 ORISMOLOGY. 



6. OVATE (Ova fa}. Oval, but having the ends circum- 



scribed by unequal segments of circles. PLATE XX. 

 FIG. 12, 13. 



7. CORDATE (Cordata). Heart-shaped. Ovate or sub- 



ovate and hollowed out at the base, without pos- 

 terior angles. PLATE IX. FIG. 22. 



8. SAGITTATE (Sagitfata). Arrow-shaped. Triangu- 



lar, hollowed out at the base with posterior angles. 

 PLATE XXVII. FIG. 41. to"'. 



9. HASTATE ( Hastata ). Halberd-shaped. Triangu- 



lar, hollowed out at the base and sides with the 

 posterior angles spreading. Ex. Horn of the pro- 

 thorax of Dynastes hastatus. Postfurca in many 

 Coleoptera. PLATE XXII. FIG. 5. b f. 



10. TRIANGULAR; QUADRANGULAR; QUINQUANGU- 



LAR ; SEXANGULAR ( Triangula ; Quadrangula ; 

 Quinquangula ; Sexanguld). Having three, four, 

 Jive^ or six angles. 



11. TURBINATE (Turbinata). Top-shaped, triangular 



with curved sides. PLATE XXV. FIG. 18. 



12. ENSATE (Ensata). Gradually tapering till it ends 



in a point. Ex. Ovipositor of Acrida viridissima. 

 PLATE XV. FIG. 19. 



13. LANCEOLATE (Lanceolata). Oblong and gradually 



tapering towards each extremity. Ex. The Cerci 

 in Blatta. PLATE XV. FIG. 23. Q". 



14. SIGMOIDAL (Sigmoidea). S-shaped. Lanceolate 



and concave on one side at the base, and on the 

 other at the apex. Ex. Ovipositor of Cimbex^ 

 PLATE XV. FIG. 21. H. 



15. CUNEATE (Cuneata). Wedge-shaped. Having the 



longitudinal diameter exceeding the transverse, 



