8 SYNOl'SKS AND DESCRIPTIONS. 



more ante and two or more postorbitala, or the eye surrounded by a ring 

 of eight or ten scales. Labials nine or more, anterior commonly higher. 

 Infralabials ten or more, anterior broader or subdivided. Two or three 

 pairs of small submentals, decreasing in size backward. Scales small, 

 smooth, number of rows varying greatly (highest noticed, 45). Ventrals 

 varying in width and number (near 200), Anal entire. 



Color uniform leaden to reddish-brown, light yellowish below. 



Charina trivirgata. 



Liciianura trivirgata Cape, 1861, Pr. Ac. N. Sc, Phil, 304. 



Rostral prominent, elevated, recurved, five-sided. Loreals five. Ocular 

 ring of ten scales. Labials 14-15, anterior higher. Infralabials 15, ante- 

 rior five longest. A short mental fissure. Scales in 40 rows, inferior a 

 little larger. Total length, 25 inches; tail 4. Brownish-yellow, lighter 

 below. Belly and flanks speckled with reddish-brown. Back with three 

 deep, reddish-brown bands from muzzle to end of tail, median four, lateral 

 five, and separating spaces three and a half scales in width. (From descr. ) 



Hab. Lower Cal. 



Possibly a variety of the preceding. 



BOAEIDAE. 



Body more or less compressed; head distinct; tail generally prehensile. 

 Pupil oblong, erect. Larger teeth in front, Submental fold conspicuous'. 

 A spur or rudimentary limb on each side of the vent. 



Boa Linne. 

 Body elongate fusiform, slightly compressed; head distinct, flattened on 

 the crown, broad posteriorly, muzzle prominent; tail prehensile. Nasals 

 entire or divided. Nostril lateral. Teeth smooth, larger forward. Labials 

 not pitted, short, numerous. Scales covering the top of the head and the 

 loreal region and surrounding the eye, small. Dorsal scales small, smooth, 

 flat, Anal entire. Subcaudals simple. 



Boa imperator. 



Daudin, 1803, Hist. Bept. V, 150. 



Body robust. Muzzle truncate, outline of extremity nearly vertical. 

 Scales of head, face, and temples small, rather larger than those of B. con- 

 atrictor, Eye surrounded by 16 to 18 scales, of which several are in 



