166. TRIMERORHINUS, 139 
loreal as long as deep or a little longer than deep; one preocular, 
in contact with or narrowly separated from the frontal ; two post- 
oculars ; temporals 1 or 2+2 or 3; eight (rarely seven or nine) - 
upper labials, fourth and fifth entering the eye; four or five lower 
labials in contact with the anterior chin-shields, which are as long 
as or longer than the posterior. Scales in 17 rows. Ventrals 140- 
183; anal divided; subcaudals 62-79. Coloration very variable. 
Greyish, yellowish, or pale olive-brown above, with brown black- 
edged markings, which may form three or four longitudinal series 
of round or rhomboidal spots or be partially or entirely confluent 
into three undulous or straight longitudinal bands; a yellow 
vertebral line sometimes present ; a dark band on each side of the 
head, passing through the eye, widening behind and often joining 
its fellow on the occiput, sometimes broken up into spots; upper 
lip yellowish white, uniform or with black spots; tail with three 
dark stripes ; lower parts white, dotted or spotted with bluish grey 
or black. 
Total length 850 millim.; tail 170. 
South Africa. 
a-e. 2 (V. 160, 149, Cape of Good Hope. 
151; C. 71, 68, 71) 
& yg. (V. 152, 162; 
C. 70, 69). 
Sh. ig (V. 153; Cape of Good Hope. Rey. G. H. R. Fisk 
oe 7 Fuk 
t. (V.142; C.70), Simon’s Bay. Hits. ‘ Challenger.’ 
mee (Vv. 148; C. yee 
& yg. (V. 161; 
0. 72). . 
k- as 3 ye. 162, 156; Port Elizabeth. Mr. J. L. Drege [P.]. 
P, 71 
m. 2 (V. 171; 0.66). Port Natal. Rey, aS Callaway 
n. Her. (V. 160; Johannesburg, Transvaal. rey G. H.R, Fisk 
[P.]. 
o. 2 (V.177; C. 62). Humbe, Angola. Prof. Barboza du 
Bocage [P.]. 
p-v, w-e. dg (V. 157, S. Africa. 
147; C. 69, 68), 2 
(V. "155, 159, 154, 
170, 172, 176, 162, 
153), & her.(V, 17 rs 
151; C. 75, 69). 
B, y. Skulls. 8. Africa. 
2. Trimerorhinus tritzniatus. 
Rhagerrhis triteniata, Giinth. Ann. § Mag. N. H. (4) i. 1868, 
. 423, pl. xix. fig. H; Bocage, Herp. Angola, p. 110, pl. x a. tig. 1 
1895 
Coronella triteenia, Giinth. in Oates, Matabele Land, p. 329, pl. C 
(1881). 
Psammophylax triteeniatus, Peters, Reise n. Mossamb, iii. p. 119 
(1882). 
