REPTILES. 



Tam. I. CALAMARIDiE. 



Body generally moderate, cylindrical, sometimes elongate cylin- 

 drical Tail generally short, cylindrical, rather tapering. Head 

 not distinct from neck, with rounded or pointed muzzle ; some 

 shields of head always united. Cleft of mouth short. Nostril 

 lateral, small. Eye generally small, with round pupil ; never more 

 than one anterior and two posterior oculars. Scales sometimes 

 short and smooth, rounded behind, not much imbricate, some- 

 times rather elongate and keeled, in thirteen to nineteen rows. 

 Ventral plates without keels. Teeth generally equal and smooth, 

 sometimes posterior maxillary tooth longest, "sometimes grooved. 



Calamaria, Schlegel,Essai,n. p.25. Calamariens, Djwi.^- Bibr. 

 vii. p. 48. Leptognathiens, pt., Dum. Sf Bibr. vii. p. 462. 

 Ste'iiocephaliens, Dum. <y- Bibr. vii. p. 831. 



1 



Synopsis of the Genera. 

 Only one pair of frontals ; scales in thirteen 



3 



Calamaria. 

 rows. Asia. 



Conopsis. Only one pair of frontals; scales in seventeen 

 rows. North America. 



Amblymetopon. Rostral shield with a sharp ridge above, 

 and forming a suture with the vertical. Central America. 



4. Rhinostoma. Rostral shield separated from vertical by 



the frontals, with a sharp ridge above; subcaudals two- 

 rowed. America; Africa. 



5. Rhinosimus. Rostral shield with a sharp ridge above; 



subcaudals entire. 



6. Rhabdosoma. Scales smooth; subcaudals two-rowed; 



rostral rounded ; two pairs of frontals ; teeth smooth ; 

 loreal united with ante-ocular ; anal entire. South Ame- 

 rica; East Indies. 



Brachyorrhos. Scales smooth; subcaudals two-rowed ; 

 rostral rounded ; two pairs of frontals ; teeth smooth ; 

 loreal united with frontal. East Indian Islands. 



Aspidura. Scales smooth ; subcaudals entire. Ceylon. 



Haplocercus. Scales keeled ; subcaudals entire. Ceylon. 



Elapoiois. Scales keeled, in fifteen rows; subcaudals 

 two-rowed. Java. 



Streptopiiorus. Scales keeled, in nineteen (seventeen) 

 rows; subcaudals two-rowed; one anterior pair of frontals. 

 Central and South America. 



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8. 

 9. 

 10. 



11. 



