^ ■ l\eriew of the Chcetodoutidce 



Ch^todontops Bleeker, 1. c. . 58 (collaru). 



Hemich^todon Bleeker, 1. c. , 53 {capistratiiH). 



Lepidoch^todon Bleeker, 1. c, oi {unimaeulatus). 



Oxych^:todon Bleeker, 1. c, M (lineolatus). 



GoNOCH^TODON Bleeker, 1. c. 54: {triangulum). 



Ch^todon Jordan & Gilbert, Synopsis Fisli. North America, 1888, 614 



(cfqnstrati/s). 

 Anisoch^todon Klunzinger, Fisclie des Rothen Meeres, 1884, 54 {aunga, 



etc.). 



Type, Chcetodon capistratus. 



As the first species enumerMted under Chcetodon by Artedi, 

 beloDgs to the modern genus Poma cant hits, Bleeker, Gill and 

 Poey have transfen-ed the name ClicBtodon to the latter group. 

 The present genus is therefore called by Gill, Sarothrodus, and 

 by Bleeker, Tetragonoptrvs, the latter name being taken from 

 Klein. 



If, however, our generic nomenclature is to date from 1758, 

 this change is inadmissable. The Chcetodon of Linnaeus practi- 

 cally corresponded to the modern i'amWy of ChcptodontidcB. It 

 was first restricted by Cuvier to species of the type of the Lin- 

 ngean S])ecies, striatv'^. capistratus, etc., and with this group the 

 name must remMin. The selection of capistratus as the actual 

 type of the genus dates from the work of Jordan & Gilbert. 



Very young forms of Cha^todon, wliicli ai'e ])i-ovided with 

 large flat, membranous, scale-like, exi)ansiuns or shields devel- 

 oped fi'om the bouesai.out the head (preopercle, shoulder-girdle, 

 etc.), have been desci-ibed under the generic name of Tholichthys. 

 The true character of Tholichtliys as a lai'val Chcetodon, has been 

 shown by Dr. Liitkeu (Spolia Atlantica). 



The species of Chcetodon are vci'y numerous, and abound in 

 all tropical seas about the coral reefs. 



ANALYSIS OF NORTH AMERICAlSr SPECIES OP CH^TODON. 



a. Scales of trunk all subequal, with their posterior margins regularly 

 rounded. 

 h. Series of scales below the axis of the body running obliquel}^ upward 

 and backward. {Chcetodontops Bleeker.) 



