1864. ] DR, J. E. GRAY ON DACTYLETHRA. 463 
loped, the eye on the side of the head only visible from the upper 
surface ; but they have a well-developed tail attached to their bodies, 
with a very narrow, thin inferior membrane. The nose is blunt, 
rounded at the sides. The mouth small, the beard well developed 
at the angles. The eyes are far behind the angle of the mouth, and 
without any appearance of a small beard on the under part of the 
orbits. These specimens have a very distinct spur, covered with a 
black claw, at the inner side of the base of the hind foot. 
I am willing to admit that there are some facts which might in- 
duce one to believe that these animals may prove to be the larva of 
Dactylethra; and, as truth is my only object, I think it right to 
state them, though they may only be similarities that are common 
to the two genera of the same family. 
1. There is a small, white, round, prominent dot on the side of 
the nose in front, nearly on a level with the lower part of the orbit, 
which appears as if it might develope itself into the orbital beard 
of Dactylethra; and I think this much more likely to be the case, 
than that the beard of the angle of the mouth should become the 
suborbital beard. 
2. There are the same double rows of glands which I have de- 
scribed as found in Dactylethra; but in these young animals they 
have a very peculiar appearance. On the forehead, rather in front 
of the eyes, there is a transverse groove, which is continued over the 
eyes, the base of the fore legs, along the side to the groin, and then 
bends up again, and becomes united to a similar groove on the upper 
surface of the body, which circumscribes an oval well-marked disk 
or shield that covers the back. The two rows of glands above de- 
scribed are placed on the margin of this shield. The glands are vi- 
sible in the adult Dactylethra, but the disk is not distinguishable. 
