INTRODUCTION. 



MALACOPTERYGII. 



SiLURiDiE. Entire No. of species 



3 whereof new 2 



Brought up 



. 30 



21 

 . 2 





7 ... 6 



Cyclopterid^: . 



. 2 





1 



EciIENEIDIDffi 



. 1 



. 2 



[perhaps more.] 



SALMONID.JE ..... 



8 ... 7 



Anguillid^: 



. 6 



Pledeonectidb .... 



6 ... 1 











[probably more.] 







_ 





30 21 



Total 



. 39 



Total, new 25 



LOPHOBRANCHII. 

 Syngnathidje. Entire No. of species . . 3 whereof new . 



PLECTOGNATHI. 



TETRODONTiDiE. Entire No. of species . . 7 whereof new 

 Balistid« ° • 



Total 12 



Total, new 



CYCLOSTOMI. 



Petromyzonid js. Entire No. of species . . 1 whereof new . 



TOTAL IN THE SEVERAL ORDERS. 



Acanthopterygii. Entire No. of species . . 82 whereof new 



Malacopterygii 39 . 



lophobranchii 3 ■ 



Plectognathi 12 . 



Cyclostomi 1 . . . 



Grand Total 



41 



25 

 3 

 5 

 1 



137 Grand Total, new . 75 



It appears from the above table that of the entire number of species, three- 

 fifths belong to the Acanthopterygian fishes, — rather more than one-fourth to the 

 Malacopterygian, — and about one-eighth to the remaining orders united. 



In the Acanthopterygians, the new species amount to one-half; in the Mala- 

 copterygians, to about two-thirds ; in the remaining orders together, to rather 

 more than one-half. 



Looking, therefore, to the entire number of species described, the Acanthop- 

 terygians prevail ; and it is in the same order that there are most new ones : but 

 looking to the proportion, which in each order the new ones bear to the entire 

 number, it is among the Malacopterygians that this proportion will be found 

 highest. 



Restricting our view, it will be also seen, in the Malacopterygians, that the 

 new species are relatively most numerous in the fresh-water groups, such as the 

 Silaridce, the Ci/prinidce, and Salmonidce, in which three families taken together, 



