THE PRINCIPAL SPECIES OF POISONOUS SNAKES 107 
Colour: Body with black annuli in 6—10 sets of three, separated 
by broad red interspaces, the middle annulus usually wider; snout 
yellow, the end usually black ; back of head red. 
Total length, 1,120 millimetres ; tail 100. 
Habitat : Tropical South America. 
(22) EH. lemniscatus.—Scales in 15 rows; 241—262 ventrals ; 
30—39 subcaudals. 
Colour: Body with 11—14 sets of black annuli disposed in 
threes, separated by red interspaces ; head yellow; end of snout 
and a band across the middle of the head black. 
Total length, 1,000 millimetres ; tail 80. 
Habitat : Guianas, Brazil. 
(23) H. filiformis—Scales in 15 rows; 290—308 ventrals ; 
45 subcaudals. 
Colour: Body with black annuli disposed in threes, with red 
interspaces ; head yellow ; end of snout black ; a black band across 
the eyes. 
Total length, 575 millimetres; tail 40. 
Habitat : Amazons, Colombia. 
35 
(24) H. mipartitus—Scales in 15 rows; 210—278 ventrals; 
24—34 subcaudals. 
Colour black, with 40—68 narrow white annuli; head black to 
between the eyes, elsewhere yellow. 
Total length, 610 millimetres ; tail 50. 
Habitat : Central America and Tropical South America. 
(25) H. fraseri.—Scales in 15 rows; 303 ventrals; 25 sub- 
caudals. 
Colour black, with 75 narrow whitish rings with broken out- 
lines; head black in front, yellow behind. 
Total length, 780 millimetres ; tail 40. 
Habitat : Ecuador. 
(26) EH. mentalis—Scales in 15 rows; 255—268 ventrals ; 30—31 
subcaudals. 
Body black, with 58—70 narrow white annuli, which become 
