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SCHLEaEL’S AREAKaEMENT OE SERPENTS. 
EXPLANATION OF THE PLATES. 
A B, Head of Herpetodryas carinatus, shewing the designations 
of the large Scales or Plates that cover the heads of Serpents. 
A, Upper Sitrpace. 
a Vertical 
h Occipitals 
c Superciliars 
d Temporals 
e Posterior frontals 
/ Anterior frontals 
g Rostral 
h Posterior oculars 
j Anterior oculars 
k Frenal 
B, Under Surface. 
I Nasal 
m Marginal labials 
n Middle labial 
o Accessory labials 
p Anterior geneials 
q Posterior geneials ' 
r Marginal labials 
s Gular scales 
t Gular scuta 
u Abdominal scuta 
Innocuous Snakes, 
Fig. 1. Tortrix Xenopeltis 
2. Calamaria lumbricoidea 
3. Coronella Cobella 
4. Xenodon inornatus 
5. Heterodon rhinostoma 
6. Lycodon Hebe 
7. Coluber constrictor 
8. Herpetodryas carinatus 
9. Psammophis lacertina 
10. Dendrophis formosa 
11. Dryiophis Gatesbyi 
12. Dipsas cynodon 
13. Tropidonotus trianguli- 
gerus 
Fig. 14. Homalopsis Martii 
15. Boa canina 
16. Acrochordus fasciatus 
17. Python Schneideri 
Venomous Snakes. 
18. Flaps Surinamensis 
21. Bungarus semifasciatus 
22. Naja tripudians 
23. Hydrophis schistosa 
24. Trigonocephalus atrox 
25. Crotalus Durissus . 
26. Vipera elegans 
