LYGOSOMA. 193 



Of all Reptilian genera this contains the most species, the number 

 amounting already to 106. They are represented in every part 

 of the AVorld, Europe excepted, attaining theii- greatest number 

 and variety of form in the Australian Region. 



Syiiojisis of Indian, Cei/loncse, and Burmese S^JCcies. 



A. Limbs avl'11 devclu])ed, ])euladaclyle ; 



length of hind limb exceeds distance 

 between centre of eye and fore limb ; 

 lower eyelid scaly. 

 n. No supranasals ; dorsal scales smooth. 

 a'. Four large supraoculars ; rostral con- 

 vex, 

 a". 36 to 38 scales round nuddle of 



body L. mdicum, p. 195. 



6". 30 to 32 scales round body L. zebratum, p. 195. 



b' . Five large supraoculars ; rostral flat 

 or concave above ; 38 to 40 scales 

 round middle of body. 

 a" . The hind limb, stretched forwards, 



does not reach beyond axilla .... L. niaculation, p. 196. 

 b". The hind limb reaches shoulder or 



beyond L. dutssumicri, p. 197. 



b. Supranasals present ; dorsal scales 



keeled ; 28 to 30 scales round body. . L. olivaceum, p. 197. 



B. Limbs well developed, pentadactyle ; 



length of liiud limb exceeds distance 

 between centre of eye and fore limb ; 

 lower eyelid with an undivided trans- 

 parent disk ; no supranasals. 

 rt. liostral forming a straight suture with 

 frontonasal. 

 «'. Frontoparietals two. 

 a". No enlarged nuchals. 



a. 30 scales round middle of body ; . 

 frontonasal in contact with 



frontal L, kakhieneme, p. 198. 



j3. 3-4 to 36 scales round body ; pnie- 

 frontals forming a median su- 

 ture L. mdanustictum, p. 199. 



b" . Two to live pairs of enlarged 

 nuchals. 

 a. Ear-opening smaller than trans- 

 parent ])al])ebral disk ; 22 to 24 



scales round middle of body .... L. s'ikki)aense, p. 1U9. 



a. 26 or more scales round body. 



a . 26 to 30 scales round body ; 



16 to 181amelhe under fourth 



toe ; ear-opening about as 



large as transparent palpebral 



disk L. hunulayanum, p. 200. 



/3'. 26 to 28 scales round body ; 

 16 to 18 lamelUie under fourth 

 toe ear-opening considerably 

 larger than transparent pal- 

 pebral disk L. dorice, p. 201. 



o 



