250 PROCEEDINGS OF THE NATIONAL MUSEUM vol.94 



Family CETOPSIDAE 



The genera and species centering around Cetopsis Agassiz have 

 caused me some trouble in attempting to loarn their limits, and their 

 nomenclature has not been clarified by Eigenmann in his various 

 papers. Bleeker divided the genus Cetopsis into three parts (Versl. 

 Akad. Amsterdam, vol. 14, p. 403, 1862) and added the fourth genus 

 {Paracetojms) in his Atlas ichthyologique. . . , vol. 2, p. 16, 1862. He 

 retained Cetopsis Agassiz and designated Cetopsis coecutiens Agassiz 

 as its type, defining the genus somewhat as follows: Teeth simple, on 

 premaxillarj'- triserial, on dentary and vomer uniserial; branchial 

 opening a small slit before base of pectoral fin; pelvic fins not united; 

 eye small; B. 10; A. 21. 



Hemicetopsis Bleeker {op. cit., pp. 403 and 16) was defined as having 

 teeth simple, on premaxillaries, dentaries, and vomer uniserial; pelvics 

 not united; eye inconspicuous; A. 29. Bleeker designated as type 

 "Hemicetopsis can(lira= Cetopsis candira Ag." 



Pseudocetopsis Bleeker (op. cit., pp. 403 and 16) was defined as 

 having teeth on premaxillaries and dentaries many-rowed, vomer 

 uniserial; gill opening about as long above as below base of pectoral 

 fin; pelvic fins united; eye conspicuous; dorsal and pectorals with a 

 produced filamei\t, A. 22. Bleeker designated as type "Pseudocetopsis 

 gobioides= Cetopsis gnbioides Kner." 



Paracetojisis Guichenot {in Bleeker, op. cit., p. 16) is defined as 

 having the teeth on premaxillaries, dentaries, and vomer m m^any rows, 

 vomerine teeth in a transverse band interrupted in the middle; eye 

 conspicuous; B. 9; A. 30. Bleeker designated as the type "Para- 

 cetopsis hleekeri Guich. (IVIus. Paris)." Neave (Nomenclator Zool- 

 ogicus, vol. 3, p. 558, 1940) indicates that Bleeker used a manuscript 

 name of Guichenot for the new genus and species. 



Bleeker (Nederi. Tijdschr. Dierk., vol. 1, pp. 115, 116, 1863) cites 

 the genera Cetopsis, Hemicetopsis, and Pseudocetopsis and defines them 

 the same as in 1862. Paracetopsis was not mentioned. 



Eigenmann and Eigenmann (Proc. California Acad. Sci., vol. 1, p. 

 157, 1888) list Hemicetopsis, Cetopsis, Pseudocetopsis, and "? subgen. 

 nov. ?" Under the last they list two species, Cetopsis occidentalis 

 Stcindachner and Cetopsis ventralis Gill. The genera are not defined. 

 Eigenmann and Bean (Proc. U. S. Nat. Mus., vol. 31, p. 665, 1907) 

 give a key to the genera discussed above and name the fourth genus 

 listed that lacked a name in Eigenmann and Eigenmann {op. cit., p. 

 157). They say "the fourth, with occidentalis as the type, may be 

 named Paracetopsis (see fig. 3)." In their key they define their new 

 genus as: "Teeth all villiform, in bands, those on vomer in two 

 patches; ventrals partly joined to the hellj— Paracetopsis." This 

 definition by Eigenmann and Bean (op. cit., p. 065) agrees with that 



