154 COLUBRID &. 
pupil. Body stout, subcylindrical ; scales keeled, with apical pits, 
in 23 to 27 rows; ventrals rounded. ‘Tail short; subcaudals in 
two rows. 
North America. 
Fig. 14. 
Maxillary and mandible of Heterodon platyrhinus. 
Synopsis of the Species. 
Maxillary teeth 9 to 11+2; prefrontals 
usually in contact with each other; 
frontal longer than broad; rostral 
narrower than the distance between 
TOMER En (s = xa ene Gcceoie eta mie pte alot rae 1. platyrhinus, p. 154. 
Maxillary teeth 8 or 9+ 2; internasals and 
prefrontals separated by small irre- 
gular shields; frontal as broad as 
long or slightly longer; rostral 
narrower than the distance between 
BIO IOVS s.d sae sehen 2 Oats Ue ces ‘2... 2. stmus, p, 156. 
Maxillary teeth 6to8+2; internasalsand 
prefrontals separated by small irre- 
gular shields ; frontal as broad as long 
or broader; rostral as broad as the 
distance between theeyes.......... 3. nasicus, p. 156. 
1. Heterodon platyrhinus./»).7» /y 
Catesby, Nat. Hist. Carol. ii. pls. xliv., lvi. (1743). 
? Coluber leberis, Zinn. S. N. i. p. 875 (1766). he. 
Heterodon platyrhinus, Latr. Rept. iv. p. 32 (1800); Storer, Rep. 
Fish. & Rept. Mass. p. 231 (1839) ; Holbr. N. Am. Rept. iv. p. 67, 
pl. xvii. (1842) ; Dekay, Faun. N. York, Rept. p. 51, pl. xiii. fig. 28 
(1842) ; Baird § Gir. Cat. N. Am. Rept. p. 51 (1853); Giinth. 
Cat. p. 82 (1858) ; Jan, Arch. Zool. Anat. Phys. ti, 1863, p. 220, 
and Icon. Gén. 48, pl. iii. fig. 2 (1876) ; Garm. N. Am. Rept. p. 75, 
pl. vi. fig. 5 (1883) ; Cope, Proc. U.S, Nat. Mus. xiv. 1892, p. 643 ; 
H. Garm, Bull. Illin. Lab. iii. 1892, p. 802; Hay, Batr. & Rept. 
Indiana, p. 102 (1893). 
Coluber cacodzemon, Shaw, Zool. iii. p. 377, pl. cil. (1802). 
Scytale niger, Daud. Rept. v. p. 842 (1803). 
Coluber heterodon, part., Daud. Rept. vii. p. 153 (1803) ; Say, Amer. 
Journ. i, 1818, p. 261. 
