ON THE DISTRIBUTION OF THE GENERA. 375 



Ipmps : — If it were not for the great extent to the southward of its dis- 

 tribution Ipnops would be mucli better evidence for Caribbean westward 

 migrations ; it has been taken in tlie Panauiic, the Caribbean and the 

 Gulf of Mexico, off Pernanibuco, midway from Tierra del Fuego to Cape 

 Good Hope, and north of New Guinea. 



M//cfoj)hum : — General in distribution. Panainic to Alaska and the 

 Hawaiian Islands, Chili, Caribbean and Gulf of Mexico to Davis and Den- 

 mark Straits the Faroes 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. 



Chanliodus : — 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. 



Idk'.canthus : — Remotely bears in favor of the Central Ameiican strait. 

 Found in the Panamic, off southern California, in the mid north Atlantic, 

 northwest of Australia, and north of New Guinea. 



Baihf/trocfes : — 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 



Alepoceplialm : — The Caribbean and the Mediterranean thoroughfares 

 both find support in the distribution of Alepocephalus in its present limits. 



