166 THE VOYAGE OF H.M.S. CHALLENGEE. 



Citharichthys unicornis. 



Cithariehthys unicornis, Goode, Proc. U.S. Nat. Mus., vol. iii,, 1881, p. 342. 



Specimens, 2| inches long, were obtained by the U.S. Fish Commission, in lat. 

 40° 0' N., long. 70° 22' W., in 115 and 155 fathoms. 



Pleuronectes, Gthr. 

 Pleuronectes heanii. 



Limanda heanii, Goode, Proo. U.S. Nat. Mus., vol. iii., 1880, p. 473. 



Two specimens, 5 inches long, were obtained by the U.S. Fish Commission, in lat. 

 40° 0' N., long. 70° 23' W., at depths varying from 120 to 126 fathoms. 



Pleuronectes cynoglossus, Linn. 



Olyptocephalus cynoglossus, Goode, Proc. U.S. Nat. Mus., vol. iii., 1880, p. 475 ; Bull. Mus. 



Comp. Zool. ser. 5, vol. x., 1883, p. 195. 

 „ „ Collett, Norsk. Nordh. Exped., risk., p. 150; ForhandL Vidensk. 



Selsk. Christ., 1880, p. 82. 

 „ „ Strom, Norsk. Vidensk. Selsk. Skriv., 1884, p. 39. 



The occurrence of this littoral species at considerable depths is a very remarkable 

 fact. The U.S. Fish Commission and the U.S. steamer "Blake" found specimens 

 between lat. 34° and 39° N., and between long. 70° and 75° W.; at depths of 120, 

 263, 395, 603 and 732 fathoms; and the North Atlantic Expedition met with the 

 species near Lofoten and Finmark, at 125 to 150 fathoms. Strom has caught it in 

 Trondhjem Fjord to a depth of 200 fathoms. 



Nematops, Gthr. 

 Known from the following species only : — 



Nematops microstoma. 



Nematops microstoma, Giinth., Report on the Shore Fishes, Zool. Chall. Exp., pt. vi. p. 57, 

 pi. xxiv. fig. C. 



Habitat. — Admiralty Islands; depth, 152 fathoms. One specimen, 3f inches 

 long. 



Solea, Gthr. 



Of the numerous species of Soles one species only is at present known to descend 

 beyond a depth of 100 fathoms, viz. : — 



