CATALOG OF FOSSIL FISHES IN THE CARNEGIE MUSEUM 381 
1839-44. Ephippus oblongus L. Agassiz, Poiss. Foss., Vol. IV, pp. 15, 228, pl. 
XXXIX, fig. 3. 
Type.—Imperfect fish; Paris Museum of Natural History. 
No example of this species is to be found in the British Museum collections, 
and but one in the Bayet Collection of the Carnegie Institute. This is an imper- 
fectly preserved fish cataloged as No. 5238. 
Genus ScATOPHAGUS. 
45. Scatophagus frontalis Agassiz. 
1796. Chetodon argus G. S. Volta, Ittiolit. Veronese, p. 44, pl. X, fig. 2 
(errore). 
1831. Chetodon argus Cuvier and Valenciennes, Hist. Nat. Poiss., Vol. VI, p. 
145 (errore). 
1835. Scatophagus frontalis L. Agassiz, Neues Jahrb., p. 291. 
1839-42. Scatophagus frontalis L. Agassiz, Poiss. Foss., Vol. IV, p. 231, pl. 
MNKIX, fig, 4 
1859. Scatophagus frontalis A. B. Massalongo, Specimen Photogr. Anim. Foss. 
Agr. Veron., p. 32, pl. VIII. 
Type.—Imperfect fish; Paris Museum of Natural History. 
Unrepresented in most foreign collections, including that of the British 
Museum, this species may be studied to excellent advantage from the fine suite 
of specimens belonging to the Carnegie Museum. These are cataloged under 
the following numbers: 4014, 4014a, 4021, 4355, 5355a, 4463, 4463a, 4464, 4449, 
4449a, 4452, 5239, 4450 and its counterpart No. 4478. 
Family ACRONURIDA. 
These are herbivorous, partly carnivorous, fishes common in tropical seas in 
the vicinity of coral reefs. The existing genera Naseus and Acanthurus have 
Eocene representatives. 
Genus Nasrus Cuvier. 
The skeleton of the existing Naseus brevirostris is described by Dr. Giinther 
in his Catalogue of Fishes in the British Museum, Vol. 3, 1861, p. 349. 
46. Naseus nuchalis Agassiz. 
1796. Chetodon nigricans G. 8. Volta, Ittiolit. Veronese, p. 100, pl. XXII, fig. 1. 
1835. Naseus nuchalis L. Agassiz, Neues Jahrb., p. 292. 
1838-42. Naseus nuchalis L. Agassiz, Poiss. Foss., Vol. IV, pp. 18, 212, pl. XXXVI, 
fig. 2. 
