132 SYSTEMATIC LIST AND SYNONYMY. 
OPHIDI A—Continued. 
ROARIDAI) Js.) Seller Sisk eile) oe Seb oh te cM oymol ola iat oe 
Boidae Bonap., 1831, Saggio, — 1840, Roy. Acad. Turin. 
1320) WS Ce hee ORC MOM tiemreno Ciao Odo Out ia dh oe co 2 
Linn., 1758, Systema, I, 214, — 1766, Syst., I, 578 (Part); Gray, 1825, 
Ann. Phil., 209; Wagler, 1830, Syst. Amph., 168; D. & B., 1844, 
Erp., VI, 500. 
Boa THPERATOR! 65 5! Te ee Sco sees Corley fol toned evens cance mmm 
Daudin, 1803, Rept., V, 150; D. & B., 1844, Erp., VI, 519; Gray, 1849, 
. Cat. Snakes, 101; Jan, 1857, Ind. Sist. Rett. Mus. Milan, 44, — 1863, 
Sist., 23, — 1864, Icon., livr. 6, pl. 1, — 1865, Icon., Text, 81; Sumi- 
chrast, 1880, Bull. Soc. Zodl. de France, 179. 
Central America and Mexico. 
BOA CONSTRICTOR.:. - - Ae eOe) wala giao OO as 
Boas constrictor Linn., 1754, Mus. Ad. Fridr., 38. Boa constrictor Linn., 
1758, Syst., I, 373; Schneider, 1801, Amph., II, 247; Fitz., 1826, Neue 
Class., 54; Wagl., 1830, Syst., 163; D. & B., 1844, Erp., VI, 507; Gray, 
1849, Cat. Sn., 100; Jan, 1864, Icon., livr. 5, pl. 2, f. 2. 
Brazil to Central America. 
\iiaenniGh a poo OOO Oto baa edo of or Ob oot 
Central America: 
BOA MEXICANA: (RApp))se! oh saeaiateellce etre teics) iets ae ties eet ana 
Boa diviniloquax var. mexicana Jan, 1863, Sist., 23, — 1864, Icon., livr. 
5, pl. 4, f. 1, — 1865, Icon., Text, 82. 
(QrmMnOMO 56.6 OOO Dt OO ho O OOOO DOG DOOD OS 
Dum. Bibr., 1844, Erp., VI, 562. 
Body stout, slightly compressed; neck smaller; head broad, de- 
pressed; tail rather short. Nostrils lateral, anterior. Eyes small, 
pupil vertical. Anterior teeth larger. Labials imbricate, “without 
pits. Crown-shields large, irregular. Scales smooth, flat. Subcaudals 
simple. Claws distinct. 
CHILABOTHRUS INORNATUS .. - . Deco OM Mon Oo oo 
D. & B., 1844, Erp., VI, 563; Jan, 1863, Sist., 24, — 1864, Icon., livr. 6. 
pl. 5, f. 1. Boa inornata Reinh., 1843, Dansk. Vid. Selsk., pl. 21-23. 
Body stout, slightly compressed; head distinct, crown flat, snout 
broad; tail short, prehensile, rather thick at the extremity. Rostral 
large, pentangular, wider at the suture with the labial and nasal. 
Nasal divided in three—upper portions largest and meeting between 
internasals and rostral, or in two—anterior part much larger and reach- 
ing from the anterior labial to the opposite nasal. Internasals and 
prefrontals large, subequal or subdivided. Frontal and supraciliaries 
large, the former often dissected. Parietals irregular, becoming scale- 
like posteriorly. Loreal large, elongate, sometimes supplemented by 
small shields. Anteoculars two, upper larger. Postoculars usually 
four. Temporals seale-like. Labials commonly eleven, the sixth 
touching the eye. Infralabials about thirteen, anterior four or five 
broad, anterior pair meeting behind the mental. Mental furrow deep. 
Submentals small. Scales smooth, flat, in 36 to 40 rows, outer and 
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