SNAKES. 105 



d. Scales keeled ; labial plates not pitted : nostrils in a single plate. 



Asiatic. 



16. Enygeus. 



Head covered with many sided, subimbricate scales, becoming 

 larger behind ; internasal plates rather large : labial shields not pit- 

 ted : nostrils lateral, in a single plate : eyes lateral ; pupil elliptical, 

 erect: scales keeled: subcaudal plates one-rowed : spurs very small, 

 scarcely apparent in the female. 



Enygrus, ff\gler, Si/st. Amph. 167, 1830 (description and part 

 of Synonyma). Bum. ^^ Bib. Erp. Gen. vi. 479. Candoia, Gray., 

 Zool. Misc. 43, 1842. Cenchris sp., Gray, Griffith, A. K. ix. 97. 

 Xiphosoma sp., Fitz. N. Class. 54. Tropidoboa, Homb. 4' Jacq. 

 Voy. au Pole Sud. 1842. Boa sp., Schneider. Vipera sp., Baud. 



* Upper edge of the phrenal region angular. 



1. The Candoia. Enygrus carinatus. Bum. ^ Bib. Erp. Gen. 

 vi. 479. Boa cariuata, Schn. Amph. ii. 261, 1801. Merrem, Ann. 

 Wetter, ii. 60, t. 9, 1810. Baud. Rept. v. 222. Schlegel, Phys. 

 Serp. ii. 397, t. 14, /. 12, 13. Abbild. 55, t. 17, /. 6, 7. Seba, ii. 

 t. 28, /. 63, 4. Candoia carinata. Gray, Zool. Misc. 43. 1 . Vipera 

 Bitis, Baud. Rept. vi. 157. Xiphosoma carinata, Fitz. N. Class. 54. 

 Cenchris ocellata. Gray, Griffith, A. K. ix. 97. Boa ocellata, 

 Oppell, MSS. Mus. Paris. Enygrus (ocellatus), Wagler, Syst. 167 ? 

 E. regius, Fitz. Syst. 24. 



Scales of the forehead as small as those of the crown ; upper 

 edge of the phrenal regions angular : tail with two or three large 

 white spots (no black streak on each side nor along the middle of 

 the belly) ; ventral shields 167 to 180. 



a, b. In spirits. " New Guinea" (Amboina ?) From the Leyden 

 Museum. 

 " Boa carinata, Schlegel." 



** Upper edge of phrenal region rounded. 



2. Bibeon's Enygrus. Enygrus Bibroni, Bum. d- Bib. Erp. 

 Gen. vi. 483. Tropidoboa de Bibron, Homb. ^ Jacq. Voy. au Pole 

 Sud. Ophid. t. 1. 



Scales of the forehead larger than those of the crown ; upper 

 lip of the phrenal region rounded ; a black ^treak on each side of 



