120 
ACTINOPTERTGII. 
An extinct family, of the Cretaceous period, known only by two 
genera, one with ctenoid scales (Ctenothrissa)^ the other with cycloid 
scales (Aulolepis). 
Genus CTENOTHRISSA, A. S. Woodward. 
[Ann. Mag. Nat. Hist. (7) vol. iii. 1899, p. 490.] 
Head large, trunk fusiform and laterally compressed. Maxilla 
robust and arched ; mandible a little prominent, and gape not 
extending behind the middle of the large orbit. Yertebrse 30 to 
40 in number, half being caudal. Dorsal fin much deepened, 
occupying about half of the back ; anal fin small; caudal fin deeply 
forked. Scales pectinated, large and regularly arranged, none 
enlarged or thickened, and no ventral ridge-scales; lateral line 
conspicuous. 
Fig. 6. 
Ctenothrissa vexillifer ; restoration, slightly enlarged. 
CtenotLrissa vexillifer (Pictet). 
[Text-figure 6.] 
1850. Beryx vexillifer, F. J. Pictet, Poiss. Foss. Mt. Liban, p. 8, pi. i. 
fig. 1. 
1866. Beryx vexillifer, Pictet & Humbert, Nouv. Hech. Poiss. Foss. 
Mt. Liban, p. 30, pi. ii. figs. 1-3. 
