APPENDIX B. 155 



Genus OPHTHAliITIIBIOIV, Dum. & Bibr. 



Gen. Char. Head more or less depressed, covered with plates; 

 rostral plate recurved under the snout, the tip of which is rounded, 

 and extending to the upper part of the head in the shape of an oval 

 cap. An anterior frontal plate. A frontal proper. A pair of su- 

 praoculars. A pair of parietals ; no interparietals, or one only. A 

 pair of nasals. A pair of fronto-nasals. A pair of oculars. A pair 

 of preoculars. Nostrils hemidiscoid, opening under the snout, one to 

 the right, the other to the left, between the nasal and fronto-nasal. 

 Eyes lateral, more or less distinct. 



Syn. OpMialmidion, DuM. & BiBR. Erp. Gen. VI, 1844, 262 ; 

 and Catal. Kept. Mus. d'Hist. Nat. II, 1852, 201. 



9. Oplitlialniidion longissiiuuni, Dum. & Bibk. — Tail double 

 the lengtli of the width of the head, cylindrical, straight, rounded at the tip, 

 and provided with a small spine. Nasal plates in the shape of little subrec- 

 tangular bands, placed longitudinally on each side at the inferior part of 

 the rostral. Oculars in vertical subhexagonal bands, less developed than 

 the preoculars, and showing the eyes but slightly through. Head yellow- 

 ish, the whole body of a grayish tint. 



Stn. Oplithalmidion longissimum, Dum. & Bibr. Erp. Gen. VI, 1844, 263 ; 

 and Catal. Kept. Mus. Hist. Nat. II, 1852, 201. 



N. America. Collected by Comte de Castelnau. Florida. ? ? 



The following species given by Schlegel in his Essai as North 

 American, cannot be admitted into our fauna without further evi- 

 dence. 



Calamaria melanocepliala Surinam & Philada 



I^ycodon clelia Philada 



Herpetodryas niargaritiferus New Orleans 



Ilerpetodryas cursor New York. 



UryoplBis Catesboei Southern States. 



Dipsa;^ aiiiiulala Delta of Miss. 



Homalopsis carisaicauda New York. 



IIoiDaSop^i!>« plieatilis, Var New Orleans. 



