296 DEEP SEA FISHES. 
but which of these names should be applied to it is a question to be settled 
by priority in publication of the works in which they first appear. The 
“Oceanic Ichthyology” of Goode and Bean, the source of Aldrovandia, 
was published jointly by the Smithsonian Institution, the U. 8. National 
Museum, and the Museum of Comparative Zoology. The Smithsonian and 
the National Museum gave to their portion of the work the date of going 
to press, 1895, and the Museum of Comparative Zoology gave to its share 
the date of completion, and distribution, September, 1896. In Collett’s 
book on the fishes secured by the yacht “ /Hirondelle,” the origin of Halo- 
sauropsis, it is stated that “Ce Fascicule a été publié et le dépét fait au 
Gouvernement 4 Monaco le 1* Juillet 1896.” From this it is evident that 
Halosauropsis will have to be retained as the name of the subgenus while 
Aldrovandia becomes a synonym. 
Species of the Halosauride have been taken in the Atlantic including 
the Mediterranean from the tropics to a latitude of 42° north, and in the 
Atlantic and the Indian Ocean southward to the parallel of 46° or there- 
about. In the western Pacific north of the equator, the “ Challenger,” and, 
in the northern extensions of the Indian Ocean, the “Investigator” se- 
cured a number of others. In the eastern Pacific two species obtained by 
the “ Albatross,” and described below, establish the distribution in the Gulf 
of Panama and westward to a short distance north of Culpepper Island. 
The known vertical distribution extends from a depth of one hundred and 
twenty-eight fathoms to one of two thousand seven hundred and fifty 
fathoms, 
Apparently the fishes of this group live at the bottom. The positions 
of their lanterns on the lower portions of the head and the body indicates 
a probable habit of illuminating the mud for a short distance around the 
individual in its search for prey. There are no special tactile organs, aside 
from the soft and flexible snout. The eyes are well developed. 
Halosaurus attenuatus sp. n. 
Plate LX. fig. 1, 1a. 
Brorl5) DEAE V8 eo: 
On the specimen described nine and one half inches, of its total length 
of sixteen, are behind the vent in the tail. The body is elongate, slender, 
moderately compressed and becomes very attenuate and filamentary in the 
