DISTEIRA 



Measureinents of Disteira ornata (Gray). 



243 



Total length 

 Snout to vent 

 Tail 



Length of head 

 Width of head 

 Depth of neck 

 Depth of body 

 Depth of tail 



mm. 



763 

 676 



87 

 30 



12 

 10 



20 

 15.5 



Variation.- — The chief variation is sexual, as the table shows. 

 Males are slenderer, with tails less compressed at base and some- 

 what longer; they are much more strongly tuberculate than 

 females. The males average 231 ventrals; 33 scale rows on 

 neck; 39 scale rows on widest part of body; and 24 around 

 tail. Females average 262.5 ventrals; 34.6 scale rows on neck; 

 44 on body; and 25 on tail. The females have only 2 pairs 

 of anals, instead of 3 pairs as in the males, and the nasal scale 

 is, usually, entirely broken in two. Several adult females show 

 no evidence of tuberculation on scales. The specimen figured 

 by Giinther * (the type of Gray's Clutidia inornata) is typically 

 identical with Philippine specimens, as characterized by the 



Table 52.' — Measurements and scale counts of Disteira ornata {Gray). 



Collector. 



740 

 763 

 656 

 510 

 802 

 365 

 420 

 350 

 320 

 396 

 390 



72 



77 



82 : 



67 



73 j 



87 



70 



56 



94 



46 



48 \ 



46 



(•) : 



. mm. 



j 28 

 27 

 27 

 27 

 20 

 27 

 30 

 24 

 20 

 28 

 15 

 20 

 16 

 18 

 18 

 18 



mm. 



13 



12 



13 



13 



10 



12 



12 



14 



10 



12.5 

 8 



10 

 7 



8.5 

 8.5 

 7.5 



vim. 



11.5 



10 



11 



10 



8 

 10.6 

 10 

 11 



9 

 11.6 



6 



9 



6.6 



6 



7 



7 



Rept. Brit. India (1864) pi. 25, fig. v. 



