110 BOID^. 



bordered by one labial (fifth or sixth) and 11 to 13 scales ; 23 to 

 2(j shields round the upper lip ; four pairs of shields bordering the 

 mental groove. Scales strongly keeled, in 29 to 31 rows. Yen- 

 trals 149-152 ; anal entire ; subcaudals 25-30. Brown above, 

 darker on the top of the head and the middle of the nape ; two 

 alternating series of large black spots on each side, the lower 

 largest and extending on the belly, which is yellowish. 



Total length 395 millim. ; tail 39. 



Guayaquil; lirazil. 



12. UNGALIA. 



Boa, part., Schlefi. Phys. Soy. ii. p. 373 (1837). 

 Uiigalia, Grmj, Zool. Mi^c. p. 46 (1842), and Cat. Sn. p. 104 (1849). 

 Tropidophis, Bibr. in R. de la Sai/ra, Hist. Cuba, Rej^t. p. 207 

 (1843); Dum. Sr Bibr. Erp. Gen.' mi. p. 488 (1844); Jan, Icon. 

 Gen. Ophid. p. 74 (18('o). 

 Leionotus, Bibr. I. c. p. 211. 

 *Notophis, Hallow. Proc. Ac. Philad. 1856, p. 156. 



Anterior maxillary and mandibular teeth longest, gradually 

 decreasing in size. Head distinct from neck, covered with shields, 

 viz. a pair of internasals, one or two pairs of prnsfrontals, a pair of 

 supraoculars, a frontal, and a pair of parietals ; nostril between two 

 nasals ; no loreal. Eye moderate, with vertical pupil. Body 

 cylindrical or compressed ; scales moderate, smooth or keeled. 

 Tail short, pointed, prehensile; subcaudals single. 



West Indies (Bahamas, Cuba, Santo Domingo, Jamaica), Guate- 

 mala, Ecuador, Peru. 



Synopsis of the Species. 



I. Vertebral scales not enlarged. 



Scales in 23 rows, keeled ; ventrals 149- 



160 1. taczanowsL'i/i, p. 111. 



Scales in 25 rows, tectiform ; ventrals 208. 2. moreletii, p. 111. 

 Scales in 27 or 29 rows, keeled ; ventrals 



203-224 3. meUumra, p. 111. 



Scales in 25 to 29 rows, smooth or dorsals 



feebly keeled : ventrals 171-211 4. maculuta, p. 112. 



Scales in 23 or 25 rows, smooth ; ventrals 



142-155 5. 2Kcrdalis, p. 113. 



Scales in 21 or 23 rows, smooth ; ventrals 



202-2u5 6. semicincta, p. 113. 



II. Scales of vertebral row enlarged. 



Scales in 25 rows, smooth ; ventrals 188. . 7. conjancia, p. 113. 

 Scales in 23 rows, keeled; ventrals 168 . . 8. cana, p. 114. 



