HYDROPHIDA IN COLOMBO MUSEUM. 17] 
D has three prefrontals in one transverse row. 
A has narrow rings dilated vertebrally, and some interrupted 
costally, especially in front, where they are modified to dorsal 
bars. 
B has forty-nine narrow complete rings not dilated vertebrally. 
© has forty-two complete rings, dilated but not confluent 
ventrally. 
D has forty-four complete rings, slightly dilated vertebrally, 
more so ventrally. 
E has forty-four complete rings dilated vertebrally and ven- 
trally, and more or less jomed by a narrow ventral line. 
B and E are evidently those referred to by Haly (Catalogue, 
1891, No. 124). 
Ue ; u,. 
Disiira cyanocincta (Dardin). 
There are four specimens, which agree as follows :—Rostral : 
portion visible above two-thirds to equal in length to the suture 
between the nasals. Prefrontals touch the second labial. Post- 
oculars : two (except in A specimen on the right side, where there 
is one only). Anterior temporals : two, followed by two small 
scales along the parietals. Labials: seven or eight, the third, 
fourth, and fifth touching the eye. Sublinguals: two pairs, 
the posterior in contact. Jnfralabials: the fourth is the largest of 
the series and touches three scales behind. Suture between the 
first smaller than that between the anterior sublinguals. Mar- 
ginals ; a complete series succeeds the second infralabial. Scales : 
imbricate throughout. Ventrals: distinct throughout, or a few 
divided here and there. 
Irregularities. 
Scales. 
a 
Anterior. Mid-body. Posterior. Ventrals. Museum No. 
A 3l Dane tot aa SoA I. ). 118 ; 3 Young 
(5 tye | Maa SD al ore Sila Mane aloo... 125 (7).. Half-grown 
me Sar oF Di eda D20 eves (ib 5 aaa do. 
Brraesrse' | 30° 6a. NSO dee ce ae) oni neo . Adult 
A has forty-five complete rings expanded vertebrally and 
constitutes Boulenger’s variety B (loc. cit., p. 295). It is evidently 
the specimen referred to by Haly in his Catalogue (1891, 
No. 118), since it still bears the label Hydrophis fasciatus and 
the No. 118. 
B has fifty-two rings, much expanded vertebrally, and is also 
one of Boulenger’s variety B. It is very rough, the head shields 
are mammillated, and many of the body scales have bidentate or 
tridentate tubercles, or keels. 
