42 



Fossil Fishes. 



the Upper Miocene of Licata, Sicily. Owing to imperfections in 

 the specimens, the former were originally placed in a distinct 

 genus, Anenclielum, and the distortion of the fossils led to an undue 

 multiplication of the so-called species. 



Hemithyr sites and Trichiuriclithijs are scaly extinct forms from 

 the Upper Miocene of Licata, Sicily, but there are no examples in 

 the collection. 



Table-case, 

 No. 55. 



Fig. 78.—Semiophorus velicans, Agassiz, from the Eocene formation of Monte Bolca. 

 A, anal fin; c. caudal, d, dorsal ; p, pectoral ; v, pelvic fins. 



Next to the Triclriurid® are arranged the fragmentary remains 

 of Xiphiida or " Sword-fishes." These, as is well known, are 

 remarkable for the great length of the cuneiform snout; they 

 are the largest of Acanthopterygian Fishes. The generic deter- 

 minations of the fossil forms are still very doubtful. Agassiz 



