|Calotes (Garden Lizard)
|1. Pelvic girdle is stout and solid. Ifts well suited for walking habits.
||1. Pelvic girdle is large and pneumatic. It is well suited for bipedal locomotion.
||1. Pelvic girdle is stout and associates with the vertebral column. It is adopted for swift running.
|2. Each os innominatum is formed by the ilium, ischium and pubis.
||2. Same as in calotes.
||2. Each os innominatum is formed by ilium, ischium, pubis and cotyloid cartilage bones.
|3. The bones are structurally united.
||3. The bones are compactly fused.
||3. Same as in columba.
|4. Ilium is strong, rod shaped and is directed upwards.
||4. Ilium is long, thin and plate-like bone. It is differentiated into preacetabular and postacetabular regions.
||4. Ilium is large and broad. The antero-dorsal edge is raised to form iliac crest.
|5. Ilium articulates with two sacral vertebrae.
||5. Ilium articulates with synsacrum.
||5. Anteriorly ilium has articular surface for the sacral vertebrae.
|6. Ischium is flat, slightly curved and axe-shaped. It is directed downwards and backwards.
||6. Ischium a flat bone fused with the post acetabulariiium. They are separated by ilio-ischial foramen.
||6. Ischium is broad and slightly curved bone lying behind ilium. It is posterodorsal in position.
|7. Ilio-ischial foramen is present.
||7. llio-ischial foramen is large.
||7. Ilio-ischial foramen is absent.
|8. Ischial tuberosity is absent.
||8. It is absent is pigeon.
||8. Ischium bears an ischial tuberosity.
|9. Ischial symphysis is present.
||9. It is absent.
||9. Ischial symphysis is present.
|10. Hypoischium is present between the ends of the two ischia.
|11. On the ventral side posteriorly the pubis is formed like a flat elongated and slight ly curved bone, pubis.
||11. Pubis is long, slender, curved bone. It lies ventral and parallel with ischial, Pubis.
||11. Pubis is flat curved bone directed ventrally pubis symphysis is present. Epipubis is absent.