450 Oil Benedenius deneeiisis, Traquair. 



it \_Beneden{us\ is after all more PaUeoniscid, and should be 

 restored to the family Palaeoniscid^ " ; the result of which 

 has been, as 1 think, an incorrect allocation of this genus in 

 Mr. Smith Woodward's ' Catalogue of Fossil Fishes.' 



At the suggestion of Dr, Traquair, who has most kindlj 

 assisted me with advice, I have compared the new specimens 

 with the type in the Zoological Museum of Louvain Uni- 

 versity, wliich has been most kindly entrusted to me by 

 Prof. Gilson. I entertain no doubt as to their specific iden- 

 tity, although the proportions differ a little, as may be seen 

 from the following measurements of the type specimen : — 



millim. 



Total length 295 



Length of head 63 



From head to caudal fin 158 



Caudal fin 86 



Greatest depth of body 108 



Length of caudal peduncle 20 



Depth of caudal peduncle 31 



From head to dor.-al fin (in a straight 



line) _ . 104 



From head to ventral fin 76 



From head to anal fin 120 



Length of dorsal fin 50 



Greatest depth of doi'sal fiu 38 



Length of anal fin 25 



After the excellent description given by Traquair of that 

 specimen, I have naturally little to add. I musr, however, 

 point out that the shape and sculpture of the scales ai)proaching 

 the dorsal ridge-scutes have not been correctly figured ; they 

 entirely lose the rhomboidal shape and assume a more con- 

 centric striation, as 1 have described above. A piece of this 

 region is figured, enlarged, on PI. X. fig. 5. The base of the 

 dorsal fin is denuded, but there remain a few of the distal 

 hourglass-shaped fin-supports (baseosts), noticed above, and I 

 can also distinguish the extremities of several of the proximal 

 supports (axonosts), the presence of which had not yet been 

 ascertained in Benedenius] these axonosts are nearly as thick 

 as the baseosts. 



EXPLANATION OF THE PLATES. 



Platk IX. 



.B<'^«>f/c«JMS f/e7(f<'Wi''j"«, Tiaq., nearly complete specimen (A), preserved in 

 the Abbey of Maredsous. The greater pari of the head and the 

 extreniitv of tlie tail omitted. Natural size. 



