THE LEPTOCEPHALUS OF THE AMERICAN EEL. 
87 
head without pigment, an irregular series of small round chromatophores on the somites near the 
middle of the body; a series of chromatophores at the base of the vertical fins, a series of chromato- 
phores above the alimentary canal. Segments 102 + 20. 
Leptocephalus caudomaculatus, sp. nov. Figs. 5, 5a, 5 h. 
Four specimens 42, 54, 57, and 59 mm. long. Albatross station 2597. 
This species resembles L. humilis in most characters. It is most readily distinguished from that 
species by the absence of chromatophores along all but two or three of the dorsal rays. The rayed 
dorsal begins about the fourth segment in front of the anus. Greatest height 13 in the length. The 
body is nearly of uniform height from the head to beyond the alimentary canal. Head about 1.25 in 
the greatest height; eye 2 in snout, 5.5 in head; snout pointed; profile straight or slightly depressed over 
eyes; pectorals well developed; nostrils close together, anterior about half way between eye and tip 
of snout; one or two chromatophores at the margin of the upper jaw; no other chromatophores about 
Leptocephalus caudomaculatus. 
the head; a series of 9 pigment spots above the alimentary canal; no pigment spots at base of anal or 
dorsal; a few chromatophores at base of tail; a spot at the upper surface of the spinal cord at its end; a 
series of about four spots in the tail just beneath the notochord; the myocomma with 1 to 3 insignificant 
chromatophores below the median line; myotonies 70-72+56-58. 
Leptocephalus latus, sp. nov. Figs. 6, 6«, 6 b. 
Type, one specimen 70 mm. long. Albatross station 2611; surface. 
This species is evidently very closely related to L. fulginosus Stromman. It differs from the latter 
principally in the size of the eye and in pigmentation. Since his specimen was larger (78 mm.), the 
difference in the size of the eye is not attributable to age. Body very thin and elevated, rather sud- 
denly widened at the nape and reaching its maximum height near the middle of the body, where it 
remains the same to near the anus, the tail broadly rounded; greatest height 7.4; head small, about 17 
