88 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
capture is in doubt, however, for there were two loose labels in the 
jar containing this fish. It was collected by the Albatross on November 
19 or 22, 1904, at either station 4669 or 4675. Both of these stations 
lie off Callao, Peru,? station 4669 at latitude 12°13’ S., longitude 80°25’ 
W., and station 4675 at latitude 12°54’ S., longitude 78°33’ W. The 
known range of the genus Scopelengys may now be stated as the 
Arabian Sea and the Pacific coast of Mexico, Central America, and 
South America. Norman (1939, p. 28) recently recorded new material 
from the Arabian Sea. 
Parr (1928, pp. 47-48) divided the Myctophidae into three subfami- 
lies, Scopelenginae, Neoscopelinae, and Myctophinae, principally on 
the basis of the presence or absence of photophores and their arrange- 
ment when present. Following this system, Solivomer would fall 
into the Scopelenginae, but as the new genus obviously forms an inde- 
pendent line it is possible that it should be placed in a separate sub- 
family. The continuous vomerine dentition, as well as the granular 
nature of the teeth, could be used to justify subfamily ranking. For 
similar reasons, Parr (1928, p. 16) regarded Notosudis of the Sudidae 
as comprising a distinct subfamily. Without further study, however, 
particularly of the osteology of the genera of myctophid fishes, I 
hesitate to add another subfamily to the list. 
Solivomer combines a number of primitive or generalized features 
with some specialized ones, which suggests that it is close to, but not in 
direct line with, the basic type from which the Myctophidae may have 
evolved. Gregory and Conrad (1936, fig. 4, p. 31) chose Veoscopelus 
to represent the primitive myctophid and I agree that this genus is a 
generalized representative. It differs most conspicuously from both 
Solivomer and Scopelengys in possessing photophores in the belly 
region (and also under the free tip of the tongue), and in the follow- 
ing features it appears to be somewhat more specialized than Solivo- 
mer: (1) vomerine teeth in two broadly connected patches—a char- 
acter that appears to have been generally overlooked, for these teeth, 
when present in the Myctophidae, are generally described as being in 
two well-separated patches; and (2) 9 rather than 10 branchiostegals. 
Probably all three of these genera, Solivomer, Scopelengys, and Neo- 
scopelus, represent offshoots from the base stem of the Myctophidae, 
with Solivomer and Neoscopelus nearer the generalized stock than 
Scopelengys. 
One-eyed specimen.—Of the 31 specimens of Solivomer arenidens 
available to me, all except one are normal-eyed. One adult paratype, 
?The possibility that the specimen was taken in the Alexander Archipelago of Alaska 
seems remote but should be mentioned. A third label in the jar, loosely but definitely 
wrapped in paper with some other fishes, reads “Dr. 4749 Aug. 29, 05 Albatross.” This 
locality is at lat. 55°33’ N., long. 131°51'48’’ W. 
