168 COLUBRID. 
a-b, ¢. 4 Ne 64 200, 195 ; W. Africa. (Types.) 
G.16 
d, Hr. (V. 16, ©, 154). W. Africa. Mr. Rich [P.]. 
e. Hgr. (V. 188; C. 155). W. Africa. Mr. Argent [C.]. 
F-g. o (V. 179; OC. 144) & W. Africa. Haslar Collection. 
9 (V. 198; C.?). 
h,i. 5 (V. 185; C. 152) & Fantee. T. E. Bowdich, Esq. 
hgr. (V. 193; C. 149). Pi} 
k. ¥p. (V. 190; C. 154). Ashantee. 
2. Skull. Senegal. 
14. Psammophis biseriatus. 
Psammophis biseriatus, Peters, Sitzb. Ges. Naturf. Fr. 1881, p. 88; 
Fischer, Jahrb. Hamb. Wiss. Anst. i. 1884, p. 18, pl. i. fig. 4; 
Bouleng. Ann. Mus. Genova, (2) xii. 1892, p. 15; Boettg. Zool. 
Anz. 1893, p. 119; Stejneger, Proc. U.S. Nat. Mus. xvi. 1894, 
p- 731; Bouleng. Proc. Zool. Soc. 1895, p. 537. 
Snout once and two thirds to twice as long as the eye. Rostral 
a little broader than deep, visible from above; nostril between two 
shields ; internasals much shorter than the prefrontals; frontal 
twice to twice and a half as long as broad, much narrower, in the 
middle, than the supraocular, longer than its distance from the end 
of the snout, a little shorter than the parietals ; loreal three to four . 
times as long as deep; one preocular, sometimes divided, exten- 
sively in contact with the frontal; two postoculars; temporals 
2+2 or 3; nine or ten (rarely eight) upper labials, third deepest, 
fourth, fifth, and sixth or fifth and sixth (or third, fourth, and 
fifth) entering the eye; five lower labials in contact with the 
anterior chin-shields, which are much shorter than the posterior, 
Scales in 15 rows. Ventrals 142-164; anal entire or divided; 
subcaudals 100-131. Greyish or pale brown above, with a darker 
vertebral band and two series of reddish-brown or black spots ; 
head with dark brown or reddish-brown, black-edged spots, and 
usually a dark cross-band on the occiput; a dark streak on each 
side of the head, passing through the eye; lips with black or brown 
spots, belly greyish, speckled with black and spotted with white, 
sometimes with a rusty median stripe. 
Total length 1050 millim.; tail 400. 
Central and East Africa. 
a. ons . 142; A. 2; Between Obbia and Ber- Signor A. B. Robec- 
. 118). 
bera, Somaliland. chi C.J; Marquis 
G. Doria as 
b. 9 (V. 154; A. 2; Inland of Berbera, E. Lort Phillips, 
©. 100). Somaliland. »/ LP. }. 
ce. 9 (V. 149; A. 1; Kurawa, E. Africa. Dr. J. W. Gregory 
C. 120). (PAY 
d. Yg., bad state. Ungora, Upper Nile. Capt. Speke [C.]. 
e. Yg. (V. 148; A, 2; 8. shore of Victoria Dr. Emin Pasha 
©, 106). Nyanza, [P.]. 
