SAUEIA. . 797 



and non-keeled lizards as belonging to one and the same species. There is this 

 also to be kept in view, that in specimens in the British Museum, two of which are 

 half- grown, while the other is an adult female, the keeling in the former is much 

 more distinct than in the latter. 



Tropidophorus microlepis, Giinther, is nearly allied to T. cochinchinensis. It has 

 the posterior frontals forming a wide suture together. In T. microlepis there is a dis- 

 tinct tendency to the formation of keels in the ventral scales, more especially visible 

 in those of the under surface of the neck, near the chest. The posterior nares are 

 situated fm^ther back than in T. herdmorei, and occupy about the same position as in 

 T. grayi. In T. cochinchinensis the posterior nares occupy about the same position 

 as in T. herdmorei, and the scales on the under surface, except on the throat, are 

 smooth. On the latter locality they are somewhat keeled. The under surface of 

 T. grayi is keeled. 



The coloration of T. cochinchinensis, T. mic7vlepis, and T. berdmorei is much 

 the same in all. 



Theobald's specimens were captured among wet gravel in the stony beds of 

 streams. I found it among rubble on the banks of the Namsa, in the Hotha valley, 

 at an elevation of 4,500 feet. 



The types were obtained in Mergui, and Theobald observed it on the Pegu range, 

 forty miles from Rangoon. The other species T. cochinchinensis and T. microlepis 

 are from Cochin China and Siam respectively, and T. grayi inhabits the Philippines. 



Genus Mocoa, Gray. 



MOCOA EXIGUA, n. s. 



The small Hzard which I describe under this name was obtained at Momien. 



The eye has a transparent disc. No supranasal. Ear without denticles or 

 lobules. The prefrontal single, in contact with the rostral, and broadly so with the 

 vertical. Pour superciliary shields. A pair of anterior occipitals; the azygos 

 shield separating them from the posterior occipitals rather large. The posterior 

 occipitals broad and large. A pair of very large anals with a small shield on either 

 side of them. Twenty-eight rows of scales round body. Porty-flve rows between 

 the axilla and groin. Limbs feeble, the fore legs reach to the eye, the hind legs 

 to half-way between the axilla and groin. A dark brown band from the snout 

 along the back to the tail, on which it disappears near the root. A pale greenish- 

 yellow band from above the posterior angle of the eye, along the side of the back 

 to the base of the tail, in the colour of which it is lost. A broad brown band from 

 the side of the snout through the eye and ear and above the fore limbs along the 

 side, disappearing a short way beyond the hind limbs. The under surface pale 

 yellowish-brown. Tail uniform oUve, with a dorsal and lateral series of minute 

 black dots, corresponding to the dark body-bands. Limbs spotted brown and 

 olive. 



