Japalura tricarinata
Range
India (Sikkim, Darjeeling), eastern Nepal and Tibet
Japalura tricarinata is an agamid lizard endemic to Asia, with common names including three-keeled mountain lizard, cloud-forest japalure, Sikkimese mountain lizard and three-keeled forest agama. It is found in India, Nepal and Tibet (China) (Wikipedia, general species account).
The Reptile Database lists Sikkim and Darjeeling in West Bengal for India. The account used here gives no further detail.