20 MAJOR F. WALL, I.MS., C.M.ZS. 
that of typical cyanocincta. According to Mr. Boulenger the rostral shield in pactficus 
is a little narrower and the frontal a little longer than in cyanocincta, and there is a 
single anterior temporal, but the remarks made on elegans, kingi, etce., apply equally 
here. I cannot doubt that, had Mr. Boulenger recognised the grooved condition of 
the posterior maxillary teeth in these species, he would long ago have included them 
in his D. cyanocincta, as the varying scale characters on which they are separated from 
each other are all to be found in one or other of the large series of 29 specimens 
in the British Museum assigned to that species, e.g., the two anterior temporals of 
kingt and the one of elegans and pacificus. 
semper. (Garman).—Not represented in the British Museum and known only 
from Garman’s description of a single specimen from Lake Taal, Luzon. Mr. 
Boulenger includes this specimen in his genus Distiva, but separates it in his 
key under the points--(a@) ‘‘Second pair of chin shields, if distinct, separated by 
several scales.”’ ()) ‘‘ A single anterior temporal.’’ Garman’s description makes no 
mention of the separation of the posterior chin shields, and there is no plate of the 
specimen. Further, he says that the seventh labial is separated from the temporal by 
a large pentagonal plate, which clearly must constitute what many consider an inferior 
temporal shield. I cannot, therefore, separate this from cyanocincta. 
tuberculata (Anderson).—Of this there is no specimen in the British Museum, but 
I have examined in the Indian Museum the type and only specimen which was des- 
cribed by Anderson in 1871, and have no hesitation in considering it cyanocincta. From 
this species Mr Boulenger separates it by its single anterior temporal and the large 
number of neck scales given as 38. ‘This number is Anderson’s count, close behind 
the head where the rows are always too variable to give reliable results. The scales 
counted two heads-lengths behind the head number 32, and at midbody 40, both of 
which numbers accord with those usually found in specimens of cyanocincta; and it 
has already been pointed out that a single temporal shield is sometimes present 
in members of that species. The head shields of Anderson’s twherculata are 
granular and the body scales bi-tuberculate, as is so often the case in large specimens 
of cyanocincta, e.g., the H. aspera of Gray incorporated by Mr. Boulenger in this species. 
Fig, 31.—Distiva grandis. After Boulenger, Cat., vol. iti, pl. xvi. 
grandis (Boulenger).—This species rests on three specimens so named in the British 
Museum. These, on careful examination, I cannot separate from the species cyanocincta. 
The distinctions made use of in Mr. Boulenger’s key are that in grandis there is a 
single anterior temporal shield only, the rostral is slightly narrower and the ventrals 
