382 MEMOIRS OF THE CARNEGIE MUSEUM 
Type.—Imperfect fish; Paris Museum of Natural History. 
This rare form is represented in the Bayet Collection of the Carnegie Museum 
by an exceedingly handsome specimen, cataloged as No. 4454. 
47. Naseus rectifrons Agassiz. (Plate XCVII, fig. 2.) 
1796. Chetodon triostegus G. 8. Volta, Ittiolit. Veronese, p. 148, pl. XX XIII 
(errore). 
1818. Chetodon triostegus H. D. de Blainville, Nouv. Dict. d’Hist. Nat., Vol. 
XXVII, p. 354. 
1838-42. Naseus rectifrons L. Agassiz, Poiss. Foss., Vol. IV, pp. 18, 218, pl. 
DeXONeVEL, toe3: 
1859. Naseus rectifrons A. B. Massalongo, Specimen Photogr. Anim. Foss. Agr. 
Veron., p. 22, pl. XII, fig. 1. 
1876. Naseus rectifrons F. Bassani, Atti Soc. Veneto-Trent. Sci. Nat., Vol. III, 
joe dlyst: 
1901. Naseus rectifrons A. S. Woodward, Brit. Mus. Cat. Fossil Fishes, pt. IV, 
p. 565. 
Type.—Imperfect fish; Paris Museum of Natural History. 
Two examples of this species are preserved in the Bayet Collection, one small 
and imperfect, the other a fine large example, both in counterpart. These are 
cataloged under the numbers 4441 and 4362 (in counterpart), No. 4441a is the 
specimen illustrated in Plate XCVII, Fig. 2. The British Museum possesses three 
specimens. 
Genus AcantHurus Forskal. 
With lateral caudal spines; spinous portion of dorsal fin less extended than 
articulated portion; anal fin with three spines. 
For a description of the skeleton of the existing A. triostegus, by Dr. Giinther, 
see Cat. Fishes Brit. Mus. (1861), Vol. III, p. 327. 
No fossil representatives of this genus are preserved in the British Museum, 
nor are examples of either of the species described by Agassiz from the Hocene of 
Monte Bolea to be found in the collections of the Carnegie Museum. One specimen 
occurs, however, catalogued as No. 4342, and having a total length of 15 em., which 
probably belongs to an undescribed species of this genus. 
Division ZEORHOMBI. 
Family AmpHistitpz. 
This extinct family, known only by the Upper Eocene Amphistium paradoxum, 
originally described as a Pleuronectes, is placed by Boulenger in close association 
