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. 
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F1G. 7. — MARKS PRODUCED ON THE SKIN BY THE BITES OF DIFFERENT SPECIES OF 
SNAKES. 
I. Non-venomous Colubrine.—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. 
Il. Venomous Colubrine (Naja tripudians, PROTEROGLYPHA). — The bite exhibits 
25 or 26 punctures from the 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. Viperide (SoOLENOGLYPHA).—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 Fayrer.) 
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. 
