27G ORISMOLOGY. 
the middle is less than that of the ends. — Ex. Pos- 
terior thigh of Locusta. Plate XIV. Fig. 5. 
35. Calceoliform (Calccoliformis). Oblong, and some- 
what coarctate in the middle. — Ex. Abdomen of 
Chelonus. 
36. Lageniform (Lageniformis). Bellying out and 
then ending in a narrow neck, something like a 
bottle. — Ex. Sperm-reservoir attached to the oviduct 
in Pontia. Plate XXX. Fig. 12. d. 
37. Constrict (Constricla). Suddenly and dispro- 
portionately smaller at one end. Plate XXII. 
Fig. 15. 
38. Luniform (Luniformis). Whose longitudinal sec- 
tion is lunate. Plate XIII. Fig. 4. 
39. Nodose (Nodosa). Having one or more knobs or 
swellings. Plate XII. Fig. 5. 
40. Geniculate (Geniculata). Bent so as to form a 
knee or angle. Plate XII. Fig. 7. 
VII. SUPERFICIES, 
i. PARTS. 
1. Disk (Discus). The middle of a surface. 
2. Limb (Limbics). The circumference. 
3. Margin (Margo). The extreme sides. 
4. Apex (Apex). The summit. 
5. Base (Basis). The bottom. 
6. Supine Surface (Pagina superior). The upper 
surface. 
7. Prone Surface (Pagina inferior). The under 
surface. 
ii. ELEVATION and DEPRESSION. 
1. Navicular (Navicidaris). When two sides meet 
