ON THE DISTRIBUTION OF THE GENERA. 379 
Ipnops : — Vf it were not for the great extent to the southward of its dis- 
tribution Ipnops would be much better evidence for Caribbean westward 
migrations; it has been taken in the Panamic, the Caribbean and the 
Gulf of Mexico, off Pernambuco, midway from Tierra del Fuego to Cape 
Good Hope, and north of New Guinea. 
Myctophum:—General in distribution. Panamic to Alaska and the 
Hawaiian Islands, Chili, Caribbean and Gulf of Mexico to Davis and Den- 
mark Straits the Fardes and Spitzbergen, Montevideo, off northwest Africa, 
Mediterranean, off Madagascar and South Africa, Bay of Bengal, Philippines 
to Fijis, southeast of Australia, east of New Zealand, and in the Antarctic 
to 62° south, 
Chauliodus : — Too broadly distributed to have very much weight in the 
present discussion. Secured in the Panamic and along the Californian coast 
to the Aleutian Islands, off the Society Islands, off the Bermudas and Mo- 
rocco, in the mid equatorial Atlantic, in the Mediterranean, the Arabian Gulf 
and the Bay of Bengal, off Japan and New Guinea. The Panamic species is 
very distinct. 
Stomias: — The great range southward detracts from what otherwise 
would be of the best evidence in support of the tropical Atlantic outlets. 
The known localities are the Panamic to the Gulf of California, the Carib- 
bean, the Gulf Stream off New York, south of Greenland, off the Cape 
Verdes to the Bay of Biscay and the Mediterranean, the Arabian Gulf, east 
of Tasmania, and south of Australia in the Antarctic. 
Idiccanthus : — Remotely bears in favor of the Central American strait. 
Found in the Panamie, off southern California, in the mid north Atlantic, 
northwest of Australia, and north of New Guinea. 
Bathytroctes : —It may be said of the range of Bathytroctes that it points 
with tolerable directness toward the existence at some time of a strait west 
of the Caribbean; less directly toward a possible migration of species through 
the Arctic, and similarly toward a strait at Suez. The localities are Pana- 
mic, off Vancouver’s Island, the Gulf of Mexico, Denmark Straits, off the 
northwest coast of Africa to the Azores, off Pernambuco, Arabian Sea, Bay 
of Bengal, and north of Celebes. 
Narcetes : — Better perhaps placed with Bathytroctes, but adding nothing 
to its range. Discovered only in the Panamic and in the Arabian Gulf. 
Alepocephalus:—The Caribbean and the Mediterranean thoroughfares 
both find support in the distribution of Alepocephalus in its present limits. 
