REPTILIA: SERPENTES: BOIDAE 



** 



7J. 



CORALLUS 



CORALLUS Daudin 



I8O3 Corallus Daudin, Hist. Nat. Rept., 5' 256. Type-species: Corallus obtus irostr is Daudin. 

 1824 X i phosoma Wagler, In Spix, Sp. Nov. Serp. Brasil: 40. Type-species: Boa can i na Linnaeus. 

 1860 Chrvsen i s Gray, Proc. Zool. Soc. London, 1860: I32. Type-species: Chrysen is bates i i Gray. 



Distribution: Nicaragua to Amazonian South America; Windward Islands. 



Content: Three species. 



Key to the spec i es 



1. Nasals separated; fewer than 85 subcaudals 2 



Nasals in contact; more than 100 subcaudals 



enydr is 



2. Dorsals in 6I or more rows; ventrals fewer than 



225 can i nus 



Dorsals in fewer than 60 rows; ventrals more 

 than 230 annulatus 



Clave de especies 



1, Nasales separados; menos de 85 subcaudales 2 



Nasales en contacto; mas de 100 subcaudales 



enydr i s 



2. Escamas dorsales en 6I mas hileras; ventrales 



menos de 225 can i nus 



Escamas dorsales en menos de 60 hileras; 

 ventrales mas de 23O annulatus 



CORALLUS ANNULATUS (Cope) 



I876 X iohosoma annulatum Cope, Jour. Acad. Nat. Sci. Phila., (2) 8 (I875): I29, pi. 28, fig. 6. 



Type-locality: Costa Rica. 

 I853 Corallus annulatus — Boulenger, Cat. Sn. Brit. Mus., 1: 102. 



Distribution: Nicaragua to Ecuador. 



Content: Three subspecies. 



Key to the subspecies 



With one pair of internasals 2 



More than one pair of internasals; anterior 

 lateral internasals in contact; posterior 

 internasals separated by single median 

 scale (Fig. l) annulatus 



Clave de subespecies 



1. Con un par de internasales 2 



Mas de un par de internasales; internasales 

 anteriores en contacto, posteriores separa- 

 das por una escama mediana (Fig. l) 



annulatus 



123 



Tip of snout as viewed from above in subspecies of Corallus annulatus (taken from Rendahl and Vester- 

 gren, 15<l). Abbreviations used are: I NLi-anter ior lateral nasal; I NL2-poster i or lateral nasal; I NM- 

 medial internasal; N-nasal; R-rostral; SL-supraloreals; Nos. 1 to 4 represent a series of scales con- 

 sidered by Rendahl and Vestergren to be same in all three subspecies. Fig. 1, a^. annulatus . Fig. 2, 

 a., blomberg i . Fig. 3j S.- colomb ianus . 



2. Two medium-sized lateral internasals 2. Dos internasales laterales de tamano medio, 



separated by two median scales arranged separadas por dos escamas medianas 



one behind other (Fig. 2) ubicadas una detras de la otra (Fig. 2) 



blomberg i blomberg i 



Large pair of lateral internasals which are Dos grandes internasales laterales, en 



in contact anteriorly but separated contacto an ter i ormente y separadas 



posteriorly by single median internasal poster iormente por una escama mediana 



i^'S- 3) colomb ianus (Fig. 3) colomb ianus 



