3586 MR. G. A. BOULENGER ON THE VARIETIES OF 
Rostral not entering the nostril!; frontal as long as its distance from the end of the 
snout or a little shorter ; occipital often as long as, and sometimes much broader than, 
the interparietal (Pl. XXVIII. fig. 1); series of granules between the principal 
supraoculars and the supraciliaries incomplete, the first (or the first and second) supra- 
ciliaries being in contact with the second supraocular?; temporal scales granular, the 
tympanic and masseteric shields distinct, the latter more or less enlarged and in 
contact with the upper temporal shield or separated from it by one or two series of 
granules; supratemporal shield often small, sometimes broken up into small scales? ; 
usually four upper labials anterior to the subocular, five on each side only in one 
specimen, five on one side in three. 22 to 29 scales and granules between the 
symphysis of the chin-shields and the median collar-plate; gular fold distinct. 
Collar without serration, composed of 8 to 11 plates. Scales on body granular, oval or 
oval-subhexagonal, strongly keeled; 55 to 71 scales across the middle of the body ; 
4 (or 3 and 4) transverse series correspond to one ventral plate, 37 to 51 to the length 
of the head. Ventral plates in 6 longitudinal and 24 to 29 transverse series. Preeanal 
plate large, with one or two semicircles of small plates. 
Scales on the upper surface of the tibia granular, strongly keeled, smaller than the 
dorsals. 18 to 23 femoral pores on each side. 27 to 31 lamellar scales under the 
fourth toe. Upper caudal scales strongly keeled, narrow, very obtusely pointed behind ; 
30 to 38 scales in the fourth whorl behind the postanal granules. 
The coloration, which is the same in both sexes, is an exaggeration of the bruegge- 
manni variety, the black predominating. Some specimens approach very nearly the 
latter in having the middle of the back green with a black network, whilst in general 
the black has so invaded the upper parts of the body that the yellow or green ground- 
colour is reduced to isolated spots, which may be as small as in the fi/folensis variety ; 
these spots may be round or wavy and transverse, as in Bedriaga’s var. flaviundata, 
with every passage between the two forms. The sides are black, with round cream- 
coloured, yellow, or blue spots. The head in some specimens may be described as 
brown with black spots or vermiculations, in others as black with yellow or green 
variegations. The limbs are black, with yellow or green round spots. The lower parts 
are black and white, the black usually preponderating and often disposed in longitudinal 
bands; some specimens are nearly entirely black beneath, with mere remains of the 
white ground-colour. Large blue spots on the outer row of the ventrals, but never 
forming a continuous band as in Bedriaga’s figure of the var. flaviundata. Tail with 
the black and white markings, usually so conspicuous on the sides in the typical 
* Forming asuture with the frontcnasal in one specimen. Another is remarkable in having two superposed 
postnasals. 
* In the type of Bedriaga’s var. flaviundata the supraciliary granules are reduced to 3 or 4. 
* {In one specimen the parietal does not touch the postocular. 
