96 ICHTHYOLOGY 
up to the insertion of the caudal, or twice and two-thirds to 
the end of this fin ; the head is a little over one quarter of 
this last dimension, and the eye is four times in the length of 
the head ; the forehead is very convex, and protruding 
a little in front of the eyes; the profile is convex, and 
the nasal bone forms a rather sharp point; the mem- 
brane which unites the maxillary to it is very apparent 
and stops considerably backwards ; the cleft of the mouth is 
very oblique, and the maxillaries extend to the perpendicular 
from the posterior edge of the orbit ; the lower jaw is about 
of the same length as the upper one, or very slightly shorter ; 
the profile under the mouth becomes strongly concave, and then 
protrudes a little obliquely, to form a sort of chin ; the lower 
profile extends to the ventrals in a rather convex way. The 
upper profile presents a little notch over the eye, and then 
extends to the back, in forming a rather concave line, with a 
feeble bump over the end of the operculum ; the highest part 
is over the lower part of the insertion of the pectorals ; the 
prseoperculum is rounded, and is marked with feeble radiated 
strise ; the operculum is also rounded ; the branchial aperture 
is broad, and extends to the length of the base of the 
pectorals, but not below : the lower edge of this opening is 
longitudinally striated ; there are no scales on the head nor 
on the body ; the skin is finely punctured ; the lateral line is 
elevated, at its base, up to near the end of the pectorals, and 
from thence it is marked by a depression to the end of the 
tail ; there are two other lines almost parallel to it, one on 
the back and the other below ; the muscular flaxes are very 
apparent ; the dorsal is unic ; it is inserted a little in front of 
the base of the pectorals on the dorsal bump I have mentioned ; 
it is formed of sixteen rather strong rays, the two first seem 
rather detached from the others in my specimen (but this may 
be the effect of dessication) ; it is higher at its posterior part 
than at its anterior one ; the caudal is as long as the head, 
subtruncated, or rather rounded at its extremity. The angle 
is high ; the front rays rather longer than the last ; the first 
a little shorter than the others ; the ventrals small, of five 
