460 DR. J. E. GRAY ON DACTYLETHRA. [Noy. 8, 
but the distinctness of the spur appears to depend on the whole foot 
being larger and more plump, and it is more distinctly developed 
or prominent in the smaller than in the larger specimens. 
The black horny claws which cover the last joint of the three 
outer toes and the spur of the hind foot are deciduous in spirits. 
Hence the spur may have been overlooked in specimens which have 
been long in spirits; and the distinctness of the spur greatly 
depends on the presence or absence of this claw. These black 
claws are to be seen on the youngest specimens as soon as the toes 
are developed. 
The skin is scattered with small white lines dispersed in a sym- 
metrical manner, which, when examined by a magnifier of rather 
high power, display linear series of close minute perforations or 
glandular openings. Dr. Hallowell seems to have observed some of 
these ; for he mentions ‘‘ the semilunar rows of longitudinal glands 
on the throat ;’’ but he does not seem to have seen that they are 
symmetrically distributed over nearly the whole of the body, and 
especially on the head, the back, and the sides, as well as the throat. 
He specially observes that the skin is smooth, and that there is no 
lateral line visible. 
Professor Auguste Duméril does not take any notice of them in 
his short observations ; but in his figure of D. miilleri (t. 18. f. 3) 
he represents the double series of them that surround the back like 
a double series of short prominences or tubercles, very unlike the 
sunken line of pores which they are—indeed so unlike that I should 
not have understood what they were intended to represent on this 
smooth-skinned Toad, had I not previously observed the glands, and 
if they were not placed exactly where the double line of pores-is 
situated, and where there are no such prominences on the animal as 
his figure seems to represent. 
I will now proceed to notice the distribution of the more important 
of these white glandular lines. There are two horizontal lines, 
slightly separated in the middle, at the end of the nose, under the 
nostril; a line between the eye and the nostril; and a series of ob- 
lique lines across the swollen band which surrounds the eye on the 
edge of the orbit ; two rows of glands on the back of the neck, placed 
rather obliquely to each other, and some scattered ones on the outer 
side of them; two series of short lines from the middle of the tem- 
ples, continued over the shoulder, along the sides, over the base of 
the thigh, to the upper surface of the vent; the upper line in these 
series is longitudinal, and the lower ones larger and transverse to the 
direction of the upper line. On the under parts there is a lunate 
series of arched linear glands across the throat and on each side of 
the body, commencing by an arched line round the back of the axilla, 
continued in a curved line, with the convex side of the curve down- 
wards, along the side of the belly, and thence to the groin. 
The disposition of these glands will appear to be of some import- 
ance in a zoological point of view when one studies the character of 
the genus St/urana. These glands, especially those on the under- 
side of the body, are much more distinct in some specimens than 
