502 FISHES CHAP. 
especially in Protosphyraena (Cambridge Upper Greensand and 
the Cretaceous of Europe and North America), it becomes greatly 
elongated and associated with an exceptionally strong dentition. 
See 
NY 
: iff, 
S ppp Wy yy YY yy) SS 
Yip Si 
I jj eed 
W4 py 
Fie. 297,—Restoration of Hypsocormus tnsignis, omitting the squamation. Upper 
Jurassic of Bavaria. x4. (From Smith Woodward. ) 
Fam. 7. Aspidorhynchidae.— Long-bodied Fishes, with a 
pointed preoral rostrum, sharp teeth, and deep rhombic scales. 
Fins small, the dorsal and anal being remote from the pelvic 
fins. Fulera vestigial or absent. Jugular plates not known. 
Two genera only are known. <Aspidorhynchus is a Jurassic 
form. Belonostomus is Upper Jurassic and Cretaceous. Species 
of the latter genus have a very wide distribution (Europe, North 
and South America, and Australia). 
Fic. 298.—Restoration of Aspidorhynchus acutirostris. Upper Jurassic of Bavaria. 
xq. (From Smith Woodward. ) 
Fam. 8. Lepidosteidae.—Body elongate, with a relatively 
short caudal region. Tail semi-heterocercal. Scales rhombic, 
thick, ganoin-coated and articulated, not vertically elongated on 
the sides of the body. Dorsal and anal fins short and remote 
from the pelvic fins. Median fins with fulcra. Both the upper 
and lower jaws more or less elongated, forming a broad and 
depressed or a long tapering beak, near the anterior end of which 
the nostrils are placed. Eyes small. Vertebral centra well 
