This Sculpture has the usual characteristics: tight curls on the head, a slight cranial protuberance, extended earlobes and a srivatsa mark on his chest. Of the 24 Jinas only two can be distinguished from the others visually: Rishabhanatha has long loose hair and Parshvanatha, the twenty-third Jina has a canopy of snakes over his head. In order to distinguish the rest one has therefore to rely on other clues, such as the mount, tree or emblem that each was given. However, as here, artists did not always include these signs, and we are not able to identify which Jina this is. The choie of marble, smooth rounded face, long eyes ending in a prominent chin and the long and pointed nose are all typical of western Indian style.
Source: http://www.bmimages.com