THE LEPTOCEPHALUS OP THE AMERICAN EEL. 
91 
Coloration all formed by minute chromatophores, a spot near ends of jaws, a spot behind eye, 
another above it at nape, a series of lines of irregular length and irregularly placed at bend of the 
myocomma along middle of sides, a few spots near upper bend of the myocommas; a similar series of 
spots along lower bend of myocommas of the tail, a series of spots along dorsal, a series of spots along 
anal, a series of double spots above and below the alimentary canal. 
Leptocephalus discus, sp. nov. Figs. 12, 12a, 12 b. 
Two specimens, 71 and 69 mm. long. Albatross, San Salvador. 
This specimen differs from all others in the collection except L. amphioxus in possessing along 
the middle of the side a series of circular chromatophores placed on every second to fourth somite. 
Body of nearly uniform width, tapering for a short distance in front and behind; depth about 
10 in the length; head 15.5 in the length; head short and conical, the upper and lower profiles with 
similar slopes; pectorals well developed; dorsal beginning about the twentieth segment; caudal 
11a 
Leptocephalus mucronatus. 
pointed, rays little developed; tail lanceolate; no pigment about head, except a series of three or four 
chromatophores on each side of throat; a few chromatophores above alimentary canal near its posterior 
end, another series on sides near base of anal; pigment between anal rays in its posterior half; a few 
pigment cells about base of caudal and two or three at base of some of posterior dorsal rays; middle 
of sides with a series of round chromatophores more numerous toward caudal; two or three chromato- 
phores above or below this series on tip of tail. 
