EASTMAN: CATALOG OF FOSSIL FLSHES IN CARNEGIE MUSEUM. 383 



neural spines in the abdominal region ; ribs short ; no fused or expanded haemal arches 

 at the base of the tail. Intermuscular bones rare or absent. Fin-fulcra present; 

 dorsal and anal fins acuminate in front, of variable length. Scales thin, more or 

 less rounded, and deeply imbricating." (A. S. Woodward, I. c, Pt. Ill, p. 490). 



Genus CEonoscopus Costa. 

 (Syn. Attakeopsis V. ThioUiere; Macrorhipis A. Wagner.) 

 "Head large and snout pointed; maxilla much deepened behind, with nearly 

 straight dentigerous border; teeth of moderate size, stout and conical or styliform. 

 Vertebral centra usually about as long as deep, and the side of each exhibiting a 

 median longitudinal ridge with a deep pit above and below; ribs robust, but short. 

 Fin-rays robust, all closely articulated and divided at some distance from the base ; 

 fulcra conspicuous on the median fins. Dorsal and anal fins short-based, the former 

 almost or completely in advance of the latter; caudal fin much forked. Scales large." 

 (A. S. Woodward, I. c, Pt. Ill, pp. 494-5). 



24. CEonoscopus desori (ThioUiere). 

 1858. Attakeopsis desori ThioUiere. 



Bull. Soc. Geol. France [2] Vol. XV, p. 784 (name only). 

 1873. Attakeopsis desori ThioUiere. 



Poiss. Foss. Bugey, Pt. II, p. 23, pi. XI. 

 1887. CEonoscopus desori K. A. von Zittel. 



Handb. Paleont., Vol. Ill, p. 232. 

 1895. CEonoscopus desori A. S. Woodward. 



Cat. Foss. Fishes Brit. Mus., Pt. Ill, p. 497. 



Type. — Nearly complete fish; Lyons Museum. 



This species, regarded by ThioUiere as the type of a distinct genus, named by 

 him Attakeopsis, is of moderate size, attaining a length of about 35 cm. Length of 

 head with opercular apparatus nearly equal to the maximum depth of the trunk 

 and contained somewhat more than four times in the total length of the fish ; cauda 

 pedicle less than half as deep as the abdominal region. Teeth closely arranged 

 in the maxilla and dentary. Vertebrae not more than 50 in number and mostly 

 as long as deep. Pelvic fins arising at a point about midway between the pectorals 

 and anal fin; median fins as in 0. cyprinoides. 



An. excellent figure of an example of this species, without description, is given 

 in the posthumous work of ThioUiere, published in 1873. A single specimen is 

 recorded in Dr. Woodward's Catalogue as belonging to the British Museum. Two 



