NO. 7 



I'ROTECTIVE ADAPTATIONS McATEE 



113 



Idoitificafions of Pisces 



Number of 

 Group identifications 



Unidentified 2,253 



Branchiostomidae 



Heptatremidae 



Myxinidae 



Petromyzonidae 



Chlamydoselachidae 



Hexanchidae 



Heterodontidae 



Scylliorhinidae 



Ginglymostomidae 



Pseudotriakidae 



Galeidae 



Spliyrnidae 



Alopiidae 



Carchariidae 



Lamnidae 



Cetorhinidae 



Rhinodontidae 



Squalidae 



Dalatiidae 



Echinorhinidae 



Squatinidae 



Pristidae 



Rhinobatidae 



Raj idae 



Narcobatidae 



Dasyatidae 



Myliobatidae 



Afantidae 



Chimaeridae 



Polyodontidae 



Acipenseridae 



Lepisosteidae 



Amiidae 



Siluridae 



Loricariidae 



Catostomidae 



Cyprinidae 



Erythrinidae 



Characinidac 



Apodes 



Percentage of 



identifications 



among those 



of all 



fishes 



457652 



5 



I 



100 



62 

 482 



.1016 



.0203 



2.0313 



12594 

 9.7909 



.0406 



Percentage 



of species 



of this group 



among 



North 



American 



fishes ■^ 



.1310 

 .0327 

 .0327 

 •3274 

 •0327 

 .0982 



•0655 

 .1965 

 .0327 

 .0327 

 .9823 

 .0982 

 .0327 

 .0327 



•1637 

 .0327 

 .0327 



•1637 

 .0327 



.0327 

 .0327 



■0655 

 .2947 

 .6221 

 .1310 

 •5239 

 .2619 



.0655 

 .1310 

 •0327 

 .1965 

 .1310 

 .0327 



3-1107 



.3274 



2.1284 



7.3346 



.0327 



.6221 



' Computed from Jordan, D. S., and I'^vermann, B. E., The fishes of North 

 and Middle America, etc., U. S. Nat. Mus. Bull. 47, 4 vols., 1896-1900. 



