106 



PISCES 



CLASS I 



spinous processes and ribs delicate. Pelvic fins thoracic, with several rays; dorsal 

 fin extending from the occiput to the tail ; anal fin extending from the anus to the 

 cleft caudal fin. Eocene. 



The two sufficiently well-known genera Palaeorhynchus, Blv., and Hemi- 

 rhynchus, Ag., occur abundantly in the Middle Eocene Calcaire Grossier of 



Fig. 186. 

 Palaeorhynchus zitteli, Kramb. sp. Upper Eocene ; Rajcza, Galicia. i/giiat. size. 



Paris, the Upper Eocene sandstone of Galicia, in the black slates of Glarus, 

 and near Buchsweiler in Alsace. P. glarisianus, Blv., H. deshayesi, Ag., and 

 P. zitteli, Kramb. sp. (Fig. 186). 



Family 10. Trichiuridae. 



Elongated and laterally compressed, almost ribbon -shaped predaceous fishes. 



Fig. 1S7. 



Lepidopus (Anenchelum) glarisianus, Ag. Upper Eocene ; Matt, near Glarus. 

 A, Head. B, Portion of trunk. Nat. size (after Wettstein). 



Gape of mouth wide, jaws and palatine bones with powerful conical teeth. Dorsal 



