LARVAL AND POST-LARVAL FISHES—REGAN. 141 
p- 190, pl. IX, figs. 3, 5), from the Indian Ocean, but with fewer myotomes, 207 
(174 + 33) instead of 220-230 (180-190 + 40). Form elongate ; head small; snout 
rather produced and acute. Teeth in 1 + 6 pairs in the upper jaw and 1 + 5 in the 
lower. Gut with a swelling (liver) at about the thirtieth myomere. A series of dots 
along the axis and along the dorsal border of the gut; a group of similar dots at the 
end of the tail. Dorsal and anal fins rayless ; a caudal fin. 
Total length 47 mm. 
Tropical Atlantic. Station 45. 21° 8., 37° 50’ W. Surface. May 4th, 1913. 
ANGUILLIDAR. 
Anguilla australis, Richards. 
An elver of 50 mm. 
Station 129. Off Three Kings Islands. Surface. August 26th, 1911. 
oOo 
cu) 
MURAENIDAE. 
Leptocephalus muraenae unicoloris (Pl. VI, fig. 7). 
A specimen of 60 mm. has the general characters of L. euryurus and L. similis of 
Lea (Michael Sars Exped. IT, 1, No. 7), and of the larva of Jfuwaena helena (Schmidt, 
Medd. Komm. Havunders. Fiskeri, IV, 2, 1913, p. 5, pl. I, fig. 3). The myotomes 
number 138 (64 + 74 ), and as this is nearly the number of vertebrae (136) counted in 
Muraena unicolor, De la Roche, this Leptocephalid may be referred to that species, 
which is represented in the British Museum collection by specimens from Algiers, 
Madeira, the Azores and St. Helena, but does not as yet appear to have been recorded 
from Brazil. 
The snout is blunt and the lower edge of the mandible is somewhat convex ; there 
are 7 or 8 teeth on each side in both jaws. The vertical fins are rayed and the caudal 
is much reduced. The pigment is in the form of small dots; some on the anterior 
dorsal fold and one at the base of each dorsal and anal ray; a line of dots along 
the dorsal surface of the gut, and anteriorly some below it. 
Tropical Atlantic. Station 46. 20° 30'8., 36° 30’ W. Surface. May 4th, 1913. 
OPHICHTHYIDAE. 
Leptocephalus hexastigma, sp. un. (Pl. VII, fig. 6). 
Myotomes 164 (72 + 92). Head small; snout acute and produced. Upper jaw 
with 10 pairs of teeth, the three. following the anterior pair strong and spaced, the 
rest closer together and decreasing. Lower jaw with 9 pairs of teeth, the anterior pair 
followed on each side by 5 strong and spaced teeth and 3 small posterior teeth. 
Dorsal rays commence in advance of anus, anal rays a little behind it. Gut with 6 
VOL. I. : x 
