NO. 2027. 



FISHES OF THE OENUS OSMERUS—FISK. 



297 



A comparative table of average measurements, compiled from 10 

 specimens from each species : 



Measurements. 



Length in mm 



Head in hundredths of length 



Eye 



Maxillary 



Depth 



Pectoral 



Ventrals 



Longest dorsal ray 



Longest anal ray 



Longest caudal ray •- 



Dorsal, from snout 



Ventral, from chin 



Number of dorsal rays 



Number of anal rays 



Interorbital width 



Length of snout - 



Lower jaw to adipose fin — 



Length of lower jaw 



Depth of caudal peduncle 



Origin of pectoral to origin of ventrals. 



Number of scales 



Gill rakers 



Sex 



Osmerus Osmerus Osmerus 

 thaleichthys. starksi. attenuatus. 



7S.1 

 24.7 



6.25 

 12.7 

 19.2 

 26.3 

 20.1 

 17.5 

 12.4 

 20.8 

 51.5 

 50.2 

 10.6 

 19.4 



7 



6 



83.3 

 13.7 



7.6 

 22.9 

 65 



13+28 

 id, 89 



19.1 



15 



16.0 



8.8 

 19.8 

 53.6 

 51.3 

 10.6 

 18.4 



7 



6.6 

 82.6 

 14.2 



8 



24.3 



72 



11+26 



Wd 



117.1 

 25 

 6 



12.5 

 15 



15.8 

 15.1 

 13.8 

 8.4 

 18.6 



s&g 



55.3 

 U.3 

 15.8 

 6.6 

 6.9 

 83.7 

 14.3 

 6.4 

 29.6 

 72 

 11+24 

 Ic?, 99 



