154 



OOLUBBIBJB. 



pupil. Body stout, subcylindrical ; scales keeled, with apical pits, 

 in 23 to "21 rows; veutrals rounded. Tail short; subcuudals iu 

 two rows. 



North America. 



Fig. 14. 



Maxillary and mandible of Heterodon platyrhinus. 



Synopsis of tJie Species. 



Maxillary teeth 9 to 11+2; praefrontals 



usually in contact with each other; 



frontal longer than broad ; rostral 



narrower than the distance between 



the eyes 1. platyrhinus, p. 154. 



Maxillary teeth 8 or 9 -f 2 ; internasals and 



prjEfrontals separated by small irre- 

 gular shields ; frontal as broad as 



long or slightly longer ; rostral 



narrower than the distance between 



the eyes 2. simus, p. 156. 



Maxillary teeth 6 to 8 +2; internasals and 



praefrontals separated by small irre- 

 gular shields ; frontal as broad as long 



or broader; rostral as broad as the 



distance between the eyes 3. nasicus, p. 156. 



1 . Heterodon platyrhinns. 



Catesby, Nat. Hist. Carol, ii. pis. xliv., Ivi. (1743). 



? Coluber leberis, Linn. S. N. i. p. 375 (1766). 



Heterodon platyrhinus, Latr. Rept. iv. p. 32 (1800); Storer, Rep. 

 Fish. $ Kept. Mass. p. 231 (1839) ; Holbr. N. Am. Rept. iv. p. 07, 

 pi. xvii. (1842) ; Dekay, Faun. N. York, Rept. p. 61, pi. xiii. fig. 28 

 (1842) ; Bairdfy Gir. Cat. N. Am. Rept. 51 (1853) ; Giinth. 

 Cat. p. 82 (1858) ; Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 220, 

 and Icon. Gen. 48, pi. iii. fig. 2 (1876) ; Garm. N. Am. Rept. p. 75, 

 pi. vi. fig. 5 (1883) ; Cope, Proc. U.S. Nat. Mus. xiv. 1892, p. 643 ; 

 H. Garm. Butt. Illin. Lab. iii. 1892, p. 302; Hay, Batr. Of Rept. 

 Indiana, p. 102 (1893). 



Coluber cacodaemon, Shaw, Zool. iii. p. 377, pi. cii. (1802). 



Scytiile niger, Daud. Rept. v. p. 342 (1803). 



Coluber heterodon, part., Daud. Rept. vii. p. 153(1803) ; Say, Amer. 

 Journ. i. 1818, p. 261. 



