10 



VENOMS 



the contrary, indeed, is the case, for their venom is infinitely more 

 active. 



These differences, as well as the particular mode of arrangement 

 of the other little non-poisonous teeth in both jaws, enable us in 

 many cases to recognise, by the mere appearance of the bite, the 

 species of snake by which the bite has been inflicted. 





I. II. III. 



Fig. 7. — Marks produced on the Skin by the Bites op different Species op 



Snakes. 



I. Non-venoinoiis Colubrinc. — The bite is marked only by the imprint of from 

 35—40 small palatine or pterygoid teeth, and 20 — 22 upper maxillary teeth (on the 

 outside of the foregoing) on each side. 



II. Venonioits Coliibrine {Naja tyipudians, Proteroglypha). — The bite exhibits 

 25 or 26 punctures from tlie pterygoid or palatine teeth, and, on each side, one or two, 

 rarely three, circular wounds produced by the principal poison-fangs and by the 

 reserve teeth. 



III. Viperid'^c (Solenoglypha). — The sole indication of the bite consists of 8 or 10 

 punctures from the palatine or pterygoid teeth, and one little round wound, on each 

 side, produced by the poison-fangs. 



(After Sir Joseph Payrer.) 



Fig. 7, above, shows how it is possible to distinguish the marks 

 left by a non -venomous reptile, and by one of the Proteroglypha or 

 Solenoglypha respectively. 



Poison-glands. — The poison-glands occupy an extensive inter- 

 muscular space behind the eyes, on each side of the upper jaw. 



