Ultimobranchial gland structure in some species of squamata

Calotes versicolor has single gland on the left side in neck region, just anterior to heart, while Ptyas mucosus and Bungarus caeruleus have 2 equal-sized glands located in the thyro-thymic region. The gland was spheroidal and measured 0.5 to 1.5 mm in diameter. Size of the gland varied individually in relation to the body size. The gland was composed of cell masses and follicles, and was well vascularized. Histology of the gland showed marked individual variation. Ciliated and goblet cells were present.