CATALOG OF FOSSIL FISHES IN THE CARNEGIE MUSEUM 361 
sentatives of this family in the Bolea Eocene. Dr. A. 8S. Woodward gives the 
following tabulation of differential characters in these genera: 
SYNOPSIS OF GENERA. 
No free dorsal spines; caudal fin forked, with elongated median rays; no scales Fistulariu. 
A series of free dorsal spines; caudal fin rhombic, without elongated ray; small 
ctenoid: scales present: sae ae erg ee cee eins ie ete cpio wae Aulostoma. 
Imperfectly known, but all caudal fin-rays much elongated; no scales........ Urosphen. 
Of the above-mentioned genera, only one imperfect example of Aulostoma 
is preserved in the British Museum. The Carnegie Museum possesses two good 
examples of Urosphen, but none of Aulostoma or Fistularia. A figure of the existing 
F. tabaccaria, which sometimes attains a length of six feet, is given by Agassiz in 
his Poissons Fossiles, Vol. IV, pl. 35, fig. 1 (wrongly labelled Aulostoma chinensis). 
Genus UrospHEen Agassiz. 
10. Urosphen dubia (Blainville). (Plate XC, fig. 2; Plate XCVI, fig. 2.) 
1796. Fistularia tabacaria, G. 8. Volta, Ittiolit. Veronese, p. 130, pl. XXIX, fig. 4 
(errore). 
1818. Fistularia dubia, Blainville, Nouv. Dict. d’Hist. Nat., Vol. X XVII, p. 341. 
1839-42. Urosphen fistularis, L. Agassiz, Poiss. Foss., Vol. IV, p. 284, pl. XXXV, 
fig. 6 (name only). 
1874. Urosphen fistularis, A. de Zigno, Catalogo Ragionato dei Pesci Fossili, 
jo UO. 
1876. Urosphen fistularis, F. Bassani, Atti Soc. Veneto-Trent. Sci. Nat., Vol. IIT, 
p. 182. 
1905. Urosphen dubia, C. R. Eastman, Mém. Soc. Géol. de France, Vol. XIII, 
No. 34, p. 20. : 
Type.—Imperfect fish; Paris Museum of Natural History. 
This, the type species, attains a length of about 45 em., of which the elongated 
caudal fin forms one-fourth. The dorsal and anal fins are similar and opposite, 
and in the smaller of the two under-mentioned specimens eighteen rays are to be 
counted in each. 
4015, 4015a. Imperfect specimen, in counterpart, in which the head has a 
length of 13 em., and the trunk is preserved to a point a little behind the median 
fins. Illustrated in Plate XC, fig. 2. 
4499. Small, excellently preserved example, in which the unpaired fins are 
well displayed. Shown in Plate XCVI, fig. 2. 
