188 MAJOR F. WALL, I.M.S., C.M.Z.S. 
als,—two or three, the second very long, and touching the eye. Infralabials,—the 
second very long. Marginals,—none. Sublinguals,—two pairs, the posterior 
separated by onescale. Costals,—anteriorly 15 to 17, in midbody 17 to 10, posteriorly 
15 to17, smooth; the vertebrals enlarged and twice as broad as the next row of costals in 
the posterior part of the body, but in three specimens where the costals numbered 19 
for a limited extent in the middle of the body the corresponding vertebrals were little 
if at all larger than the upper costal row. In these specimens the reduction of rows 
tothe normal 17 wasoccasioned by the absorption of the uppermost costal row into the 
vertebral, and the great enlargement of this row was re-established. Ventrals, —137 
to 143, broad as in land snakes, the posterior obtusely keeled in the median line; the 
last one or two sometimes divided. Anal, —divided(entire in one). Colour,— 
banded broadly with yellow, and blackish brown, the latter broader. 
Habitat.—1,oo Choo Islands, Formosa. 
I append a synopsis of the specimens I have seen showing the shields which are 
subject to variation. 
v ot 
a COSTALS. a 
fom us} 
ae SS = = Zz 
s E E 
5 3S ; : "7 2 
is = 5 2 Be - Ey 
& E fe 8 = = Bn 
c co) ue) ps) Po = 
G Q rm Zz rn a nD a 
fo} x q fas [o) ov Ga q 
[a2 AY aq = Ay > A Pel 
a ere : | | _———— = | ae 
I Yes Toc l ly, 10 17 15 143° | ast two 2 
2 RA Zee 2) Ly, 17 17 17 141 : 2 
3 No ZR 2 15 17 15 140 None 2 
4 ; ZA ae JU, 10 17 17 138 5 2 
5 Yes 2 Roer 17 19 17 141 ; 2 
6 a De Reza, 17 1g T5 142 Pe 2 
7 No 2k 2 fy 15 17 15 137 I 
8 Yes 22s ly ? 17 > 138 ¥ 2 
| 
| = 
9 = 3 1 aa, 17 19 15 142 - 2 
EMYDOCEPHALUS ANNULATUS (Krefft). 
Emydocephalus annulatus, Krefft in Proc. Zool. Soc. Lond., 1869, p. 322. 
Aipysurus annulatus, Boulgr. Cat., vol. iii, 1896, p. 304, in part. 
Similar to the above, but differing in having but two preefrontals, little if any 
enlargement of the vertebral row, costals pluri-tuberculate and rough, and no 
ventral keel posteriorly. 
Hahitat.—Loyalty Islands. 
