598 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
base of the fourth anal ray before the last; ventrals reaching front of anal; the pectorals are broken in 
the type; in some of the cotypes they are intact and are comparatively short, not teaching the middle 
of the ventrals, and falling a little short of the anterior supra-anal. 
Scales thin, entire, caducous, those of the lateral line very little larger than the others. 
Arrangement of photophores: As in M. hoops and M. humboldti, the 3 supra-anals are so disposed 
as to form an obtuse-angled triangle, the uppermost in contact with the lateral line vertically above 
origin of anal fin, the second midway between the upper supra-anal and the last ventral photophore, 
the third anterior to the second and on a level with it, a little behind second ventral pair; supra- 
ventral on a level with base of pectoral, a little higher than third supra-anal, somewhat nearer lateral 
line than ventral base; pectorals forming the usual right-angled triangle, the lower vertically above 
the second thoracic pair, the upper somewhat nearer lateral line than pectoral base; posterolateral in 
contact with lateral line, slightly behind last antero-anal; two opercular spots, upper the largest and 
lower the smallest of all the photophores; mandibulars 3 as usual; no preocular photophore can be 
detected in these young specimens. The first and second pairs of thoracics are more widely separated 
than the other pairs, which are evenly spaced, the 2 lines diverging posteriorly. The 4 ventral pairs 
are evenly spaced and form parallel lines. 
The anals vary from 12 to 14, the antero-anals from 7 to 9, the postero-anals from 4 to 6. They 
are distributed as follows in the 70 cases (35 specimens): Antero-anals 7 in 6 cases, 8 in 58 cases, 9 in 
6 cases; postero-anals 4 in 6 cases, 5 in 57 cases, 6 in 7 cases; totals, 12 in 6 cases, 13 in 57 cases, 14 in 21 
cases. Combinations found bilaterally are 7 + 5, 7 + 6, 8 + 5, 9 + 4; 8 + 5 occurs on one or both sides 
of 30 of the 35 specimens in the collection. As M. humboldti has typically 8 + 8 anals, and M. hoops 
8 + 10, it would be entirely inadmissible to identify M. evermanni with either of these species. In one 
of the cotypes of M. californiense Eigenmann, I find the anals 6 + 11. The 2 caudal photophores in 
M. evermanni are arranged a little obliquely and are separated by an interspace a trifle wider than that 
between the pairs of postero-anals. 
General color blackish, except cheeks, nostrils, and a part of the opercles, which are whitish; base 
of caudal lobes black. 
The species was taken at the following stations: Nos. 3878, south of Lanai; 3926, west of Oahu; 
3927, west of Niihau; 3931, near Laysan Island; 3932, near Laysan Island; 3980, south of Oahu, and 
4145, west of Niihau; all at the surface. 
Named for Dr. Barton Warren Evermann. 
Myctophum braueri, new species. Plate 70, Fig. l.« 
Type, 57 mm. long, from station 3980, south of Oahu, surface tow; type, No. 51527, U. S. Nat. Mus. 
Closely related to M. reinhardti i Liitken, from the Mediterranean, differing, in so far as appears 
from Liitken’s figure and very brief description (Spolia Atlantica, II, Scopelini, 1892, 257), in the 
slightly lower position of the anterior supra-anal photophore, the slightly higher insertion of the 
supra- ventral, and the much longer dorsal and anal fins (with 11 and 16 rays, respectively, in M. 
reinhardtii) . 
Greatest depth of body 21 hundredths of total length without caudal; least depth of caudal 
peduncle 7; length of head 28; diameter of orbit 13; frontal width over middle of eye 8; length of 
snout 5; length of maxillary 19; distance from front of snout to tip of dorsal 45; from front of dorsal 
to adipose dorsal 37; from front of adipose dorsal to rudimentary caudal rays 18; from tip of snout to 
ventrals 41; to origin of anal 58; base of anal 28; length of pectoral 30; of ventrals 12. D. 14; A. 22 (23 
in other specimens) ; P. 14; V. 8; scales in lateral line 40 or 41, 9 in a cross-series, excluding median 
rows along dorsal and ventral outlines. 
Body very slender, eye remarkably large, mouth oblique, snout short but pointed, upper profile 
not abruptly decurved; orbital diameter little less than half length of head; interorbital width a little 
less than three-sevenths; maxillary reaching the vertical from posterior border of eye, greatly widened 
posteriorly and bearing a lengthwise ridge parallel with its dorsal margin ; a narrow strip of its ventral 
portion protrudes below premaxillary near its tip; gape of mouth showing a double curve, convex 
upward in its posterior portion, concave upward anteriorly; mandible upturned toward symphysis, its 
tip acute, protruding a little beyond premaxillaries. 
i Myctophum lutkeni on plate, by error. 
