PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 387 



as loug as head ; preopercle weakly serrate ; 

 color silvery; lower fins wliite ; a distiuct dark 

 blotch on ox)erclc, and a fainter oue ou sides 



below spinous dorsal Panamknsis.* 



il>. Anal spines weak, the second little, if any, longer or stronger than the third, 



and both lower than the soft rays ; bodj'' ob- 

 long, not elevated ; soft dorsal and anal rays 

 with series of scales ; scales above lateral line 

 in scries parallel with the back ; color grayish, 

 with light and dark stripes along the rows of 

 scales, these often obscure. 



(H^MULOPSis Steind.) 



j}. Pectoral flu long, nearly as long as head; a black 



blotch below in the axil, encroaching on the 



lower rays of the fin ; preorbital broad, about 



as wide as eye AxiLLAKis.t 



pp. Pectoral fin short, much shorter than head ; axil- 

 lary spot, if present, not encroaching on the 

 fin. 

 q, Preorbital narrow, not so wide as eye; a round 

 dark humeral blotch ; anal si^ines very small, 



graduated NixiDUS.t 



qq. Preorbital very deep, wider than-eye ; anal spines 



not graduated Leuciscus.§ 



aa. Anal fin long and low, its rays III, II to III, 13 ; dorsal fin low, scarcely emar- 



ginate, its spines slender; anal spines small, 

 graduated ; scales small, those above lateral 

 line in oblique series ... (Ortiiopristis Gill.||) 

 r. Dorsal spines 12 ; soft parts of dorsal and anal 

 naked ; preorbital very deep, as deep as eye; 

 scales small, about 8-G0-15. 

 8. Body oblong-ovate, the dej)th considerably 

 more than one-third length ; profile from uaj)e, 

 straight or slightly concave ; pectorals long, 3f 

 in body; body brownish above, with faint dark 

 cross-bunds and oblique pale streaks. 



Chalceus.IT 



* Pristipoma panamense Steindachner, Ichthyol. Beitr. iii, 8, 1875. Habitat: Mazat- 

 lan (Gilb.); Panama (S/eujcL; Gilb.). 



\ Pristipoma axiUare Steindachner, Ichth. Notiz. viii, 7, 1833. Habitat: Mazatlan 

 {Slcind.; Gilbert). 



X Pristipoma nitidiim Steindachner, Ichthyol. Notiz. viii, 5, 1800. Habitat : Ma- 

 zatlan {Steind. ; Gilb.); Panama ((? (7?).). 



^ Printipoina leuctscus Giiuther, Proc. Zool. Soc. Lond. 18G4, 147. Habitat: Lower 

 California {Streets); Mazatlan {Gilbert); San Jos6 {Gthr.), Chiapam {Gthr.), Pan- 

 ama ( Glhr. ), Two of our Mazatlan specimens of this species agree with Dr. G iinther's 

 description and figure, in having the anal spines rather large, the second larger than 

 third, 2f in length of head ; the remaining specimens from Mazatlan and Panama are 

 slenderer, with more? pointed snout and deeper suborbital, the anal spines being quite 

 small, the second 3f to 4 in head. These i)erhaps represent a difterent species or 

 variety, but we are not prepared to give it a separate name. 



II =: Mieroh'pidotus Gill = Pristocantharns Gill. 



'i Pristipoma chalccum Gtlir. Proc. Zool. Soc. Lond. 18G4, 14G = /Vis^yiowo kiieH 

 Steind. Ichth. Notiz. viii, 18G'J, 3. Habitat: Mazatlan {Steind. ; Gilb.); Fanama {Gthr.; 

 Gilb.). 



