SNAKES OF CEYLON. 201 



(6) Entozoa: I have found many nematode worms in the 

 stomach, which were identified for me as Kallicephaluswilleyi. 

 Von Linstow records the same worm from the intestine of this 

 snake. 



Lepidosis. — (a) Typical — Rostral : The rostro -nasal sutures 

 are greater than the rostro -internasals, and about twice the 

 rostro -labials. Internasals : The suture between the inter- 

 nasal pair is about half that between the prefrontal pair and 

 about two-thirds the internaso-prsefrontals. Prefrontals : 

 The suture between the prefrontal pair is rather greater than 

 the praefr onto -frontal ; and touches the internasal, postnasal, 

 lorea, prseocular, and supraocular. Frontal : The fronto- 

 supra ocular sutures are nearly twice the fronto-parietals. 

 Supraoculars : As long as the frontal, but not quite so broad 

 along a line connecting the centres of the eyes. Nasals : 

 Quite divided. Loreal : About two-thirds the length of the 

 nasals. Temporals : The upper touches the 6th supralabiai ; 

 the lower is about as long as the supraoculars. Supralabials : 

 Nine ; the 1st and 2nd touch the nasals, the 5th and 6th, or 

 5th, 6th, and 7th touch the eye, and the 7th and 8th the lower 

 temporal. Sublinguals : Posterior subequal to the anterior, 

 and touching the 5th and 6th infralabials. Infralabials : The 

 6th is nearly as long as the posterior sublinguals, twice or 

 nearly twice as broad, and touches three scales behind. 

 Costals : Rectiform ; keeled in some of the median rows 

 posteriorly ; with paired apical facets. The Vertebral row 

 not enlarged ; the breadth of its scales about two -thirds their 

 length, and about two-thirds those in the ultimate row . The 

 ultimate row is enlarged, and the breadth of its scales rather 

 less than their length. The rows two heads -lengths behind 

 the head are 21 to 27, and two less than in midbody ; in mid- 

 body from 23 to 29 ; two heads-lengths before the Vent 21 to 

 19, or six to eight less than in midbody. The increase of rows 

 anteriorly is due to a division of the 5th, 6th, or 7tb rows above 

 the ventrals. The reduction is effected by an absorption of 

 the 3rd, 4th, 5th, 6th, or 7th rows above the Ventrals. 

 Ventrals : 217 to 265 ; subangulate laterally. Anal : Entire. 

 Subcaudals : 74 to 97 ; divided. Supracaudals : In 

 even rows. 

 31 6(6)20 



