262 . ORISMOLOGY. 
ovate and hollowed out at the base, without pos- 
terior angles. Prare IX. Fie. 22. 
8. Sacirrae (Sagittata). Arrow-shaped. Triangu- 
lar, hollowed out at the base with posterior angles. 
Pruare XXVII. Fic. 41. w”. 
9. Hastare (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. Puate XXII. Fia. 5. db +. 
10. TRIANGULAR ; QUADRANGULAR; QUINQUANGU- 
LAR; SEXANGULAR (Zriangula; Quadrangula; 
Quinquangula; Sexangula). Having three, four, 
Jive, or six angles. : 
11. Tursinate (Turbinata). ‘Top-shaped, triangular 
with curved sides. Prare X XV. Fia. 18. 
12. Ensate (£nsata). Gradually tapering till it ends 
ina point. Ex. Ovipositor of Acrida viridissima K. 
Piave XV. Fic. 19. 4 
13. Lancroxate (Ltnceolata). Oblong and gradually 
tapering towards each extremity. Ex. The Cercz 
in Blatta. Puate XV. Fic. 23. Q". 
14. SigmorpaL (Sigmordea). S-shaped. Lanceolate 
and concave on one side at the base, and on the 
other at the apex. Ex. Ovipositor of Cimbez. 
Prats XV. Fre, 21. 77" 
15, CUNEATE (Cuneata). Wedge-shaped. Having the 
longitudinal diameter exceeding the transverse, 
and narrowing gradually downwards. Puatr X. 
Fig. 11. 
16. ActnactcaTE (Acinacicata). Falchion-shaped. Curv- 
ed with the apex truncate, and growing gradually 
