A NEW DEEP-SEA FISH FROM THE PHILIPPINES—MILLER 87 
difference in the nature of the teeth, granular in Solivomer and villi- 
form in Scopelengys, and in particular the very different vomerine 
dentition—in a continuous, angular patch in Solivomer (fig. 2) in 
contrast to two separate patches in Scopelengys—clearly indicate 
generic separation. Regan (1911, pp. 125, 128) used the general 
vomerine dentition (teeth in two well-separated patches) as a family 
character for both the Sudidae and Myctophidae, but Parr (1928, 
p- 16) found that Notosudis has more or less continuous vomerine 
teeth, and Bolin (1939, p. 118) noted a similar condition in the 
myctophid Hygophum. Chapman (1939, pp. 520, 523) has described 
similar dentition in Sudis sqguamosa and Lestidium (or Bathysudis) 
parri. 
In addition to these sharp differences Solivomer differs further from 
Scopelengys in having (1) ctenoid rather than cycloid body scales; 
(2) 10 rather than 8 branchiostegals; (3) the anal fin farther back, so 
that the origin of the adipose fin lies over the origin, rather than over 
the last rays, of the anal fin; (4) principal dorsal rays 10 or 11 rather 
than 11 or 12; (5) principal anal rays 7 to 9 rather than 11 to 13; (6) 
eyes normal rather than reduced; (7) mouth less oblique; and (8) 
preorbital narrower. 
Just as this paper was finished, a specimen of Scopelengys tristis 
was discovered by chance while moving some jars of unidentified fishes 
in the National Museum. The retention of three scales on this fish 
gives us, as far as I am aware, the first information on the squamation 
of Scopelengys. The best-preserved scale is embedded and lies along 
the midline of the right side of the body, just anterior to the origin 
of the anal fin. It is cycloid, oval, deeper than long, and lacks radii. 
The greatest length is about 6.2 mm., the greatest width approximately 
4.2 mm., and the focus is far away from the scale center—apparently 
near the exposed end of the scale, as in Solivomer. The circuli are 
widely spaced near the center, showing typically rapid initial growth, 
but are regularly spaced from there to the scale margin, thus indicating 
uniform water temperature which is to be expected at great depths. 
Two other scales, loosely attached, are similar in structure and general 
form to the one just described but differ in shape as do scales from 
different parts of the body. One, the largest, lies near the dorsal base 
on the right side of the body; the other, much smaller, lies near the 
anal base on the left side of the body. From the size of these scales 
and the retention of most of the scale pockets, it is possible to estimate 
that this specimen of Scopelengys had about 82 scales along the lateral 
line. Thus the scales are larger than in Solivomer, which has more 
than 40 along the lateral line. The standard length of this specimen 
is about 135 mm. It bears U.S.N.M. No. 132459 and represents an 
extension in the known range of the genus. The precise location of 
