340 DEEP SEA FISHES. 



coasts of Europe, of the northeastern United States, of southern South Amer- 

 ica and of Japan. To this the present material adds a new species of Mjx- 

 ine from the Gulf of Panama. 



No vertical distribution has been recorded with Geotria, Mordacia and 

 Homea. Off the eastern United States Petromyzon [Bathi/myzon) Bairdii Gill., 

 was taken by the vessels of the United States Fish Commission at a depth of 

 547 fatiioms ; they also took P. marinus at a dejjth of 247 fathoms. Ilyxine 

 ghdimsa Linn, was taken by the French Government Steamer " Travailleur " 

 off the coast of Portugal at 251 fathoms, M. cirrhata Schleg., was secured by 

 the British Steamer " Challenger " off the coast of Jnpan at 345 fathoms, 

 and M. limosa Gir., was captured off the eastern coasts of the United States 

 by the U. S. Coast Survey Steamer "Blake" at 524 fathoms. The greatest 

 depth yet found for any member of this group is that at which the " Alba- 

 tross" took the new species described and figured below, 730 fathoms in 

 the Gulf of Panama. Wherever they have been taken there is reason to 

 believe these fishes live at the bottom. The presence of Myxinoids being 

 established at great depths and in very low temperatures it may confi- 

 dently be expected that future collection will obtain them from all regions 

 inhabited by other deep sea fishes on which they may prey. 

 In the year 1835 Mliller subdivided the group thus: 



Nasal duct not penetrating the palate. Ilijfcroartia. 



Nasal duct penetrating the palate. ■ Hyperotreta. 



HrPEROARTiA Miillcr, 1835. 

 As no representatives of this section of the Myxinia are included in the 

 collection the species belonging to the Hyperoartia are introduced in the 

 list only in connection with the general distribution. Omitting the fresh 

 water forms there are only eight species to be considered. 



Hyperotreta Miiller, 1835. 



One branchial aperture on each side of the body. Myxinidce. 

 Six or more branchial apertures on each side. IIomcidcB. 



MYXINID.E. 



Myrinidff Bonap., 1845, Spocc. Gen., 11. 



To the Myxinid;\3 previously known the "Albatross'' collection adds a 

 single new species. For several reasons the addition is of particular 



