4 o 



EXPEDITION ANTARCTIQUE BELGE 



I. Dorsals separated by a considérable space. 



Dorsal spine serrated n. Nematonurus, Gùnther, 18S7 (') 



Dorsal spine smooth 12. Malacocephalus, Gùnther, 1862 ( 2 ) 



j. Dorsals close together. 



a. Dorsal spine serrated. 



Scales excessively rough l3. Bogoslovius, Jord. et Everm., 1898 ( 3 ) 



Scales nearly smooth 14- Dolloa, Jordan, 1900 ( 4 ) 



b. Dorsal spine smooth l5. Albatrossia, Jord. et Everm., 1898 ( : ') 



D. Intermaxillary teeth villiform ; mandibulary 



teeth uniserial. 

 Pectorals very long, spatulate 16. Abyssicola, Goode et Bean, i8g5 ( 6 ) 



II. First branchial arch free II. Tkachyrhynchix,e. 



A. Snout elongated, pointed. 



1. A scaleless fossa on each side of the nape. 



Teeth in villiform bands in jaws. A row 

 of armed scales at base of vertical fins 

 anteriorly. Operculum very small. Bar- 

 bel présent i. Trachyrhynchus, Giorna, i8o5 ( : ) 



2. No scaleless fossa. Teeth biserial in upper 



jaw, with outer séries enlarged ; uni- 

 serial in lower jaw. No barbel. 

 No vomerine teeth. Bones of the head firm, with 

 narrow cavities. Alouth wide, latéral. Tail 



(1) J. Hector. Descriptions of rive new Species of Fishes obtained in the New Zealand Seas by H. M. S. 

 « Challenger » Expédition, July 1874. (Ann. Mag. Nat. Hist. 1875. Vol. XV. p. 81). — Macrurus armatus. 



— A. Gùnther. Deep-Sea Fishes, etc. p. i5o et PI. XL, fig. A. — Macrurus {Nematonurus) armatus. 



(2) R. T. Lowe. Notices of Fishes nevvly observed or discovered in Madeira during the years 1840, 1841, and 

 1S42. [Proc. Zool. Soc. London. 1843. p. 92). — Macrourus lavis. 



— A. Gùnther. Catalogue, etc. (Vol. IV. p. 3g6). — Malacocephalus lacis. 



— A. Gùnther. Deep-Sea Fishes, etc. p. 148 et PI. XXXIX, fig. W. — Macrurus (Malacocephalus) lavis. 



(3) D. S. Jordan and B. W. Evermann. The Fishes of North and Middle America. (Bull. U. S. Nat. Mus. 

 Vol. III. 1898. p. 2574). — Bogoslovius Clarhi. 



— D. S. Jordan and C. II. Gilbert. Fishes of Bering Sea, etc. p. 4S7 et PL LXXXIII. — Bogoslovius Clarhi. 



(4) A. Gùnther. Preliminary Notes, etc. p. 439. — Coryphuuoidcs longifilis. 



— A. Gùnther. Déep-Sea Fishes, etc. p. i5i et PI. XXXV. — Macrurus [Nematonurus) longifilis. 



— G. B. Goode and T. H. Bean. Oceanic Ichtliyology, etc. p. 417. — Moseleya longifilis. 



— L. Dollo. Racovitzia, etc. p. 3i6. 



— D. S. Jordan. Notes on Récent Fish Literature. (American Naturalisa igoo. p. 897). — Dolloa longifilis. 



(5) C. H. Gilbert. Scientific Results of Explorations by the U. S. Fish Commission Steamer « Albatross ». 

 /'. . U. S. Nat. Mus. Vol. XIV. 1891. p. 563). — Macrurus (Malacocephalus) pectoralis. 



- D. S.Jordan and L. W. Evermann. Fishes of North ami Middle America, etc. Vol. III. 1S98. p. 2573. — 

 Albatrossia pectoralis. 



6) A. Gùnther. Preliminary Notes, etc. p. 43s. — Macrurus macrochir. 



— A. Gùnther. Deep ea Fishes, etc. p. 14S et PI. XXIX. tïg. B. — Macrurus (Malacocephalus) macrochir. 

 <■• 8. Goode and T. IL Bean. Oceanic Ichtliyology, etc. p. 417. — Abyssicola macrochir. 



7) !.. Giorna. Mémoire, etc. p. 1 78 et PI. I, fig. 1 et 2. — Trachyrincus (Trachyrinque anonyme). 



