PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 387 



as loug as head ; preopercle weakly serrate ; 

 color silvery; lower fins white; a distinet dark 

 blotch on operclc, and a fainter one on sides 



below spinous dorsal Panamtcxsis. * 



11). Anal spines weak, the second little, if any, longer or stronger than the third, 



and both lower than the soft rays; bod j^ ob- 

 long, not elevated ; soft dorsal and anal rays 

 with series of scales ; scales above lateral line 

 in series parallel with the back ; color grayish, 

 with light and dark strij^es along the rows of 

 scales, these often obsciire. 



(ILemulopsis Steiud.) 



p. Pectoral fin long, nearly as long as head ; a black 



blotch below in the axil, encroaching on the 



lower rays of the lin ; preorbital broad, about 



as wide as eye Axillaris. t 



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

 lary spot, if i)reseut, not encroaching on the 

 fin. 

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

 dark humeral blotch ; anal spines very small, 



graduated Nitidus.j; 



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



not graduated Leuciscus.^ 



aa. Anal fin long and low, its rays III, 11 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. 

 s. Body oblong-ovate, the depth considerably 

 more than oue-third length ; profile from nape, 

 straight or slightl j^ concave ; pectorals long, :jf 

 in body; body brownish above, with faint dark 

 cross-bauds and oblique pale streaks. 



Chalceus.H 



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

 lan(Gi?&.); Panama (Sfein^.; Gilb.). 



i Pristipoma axillare Steindachner, Ichth. Notiz. viii, 7, 1869. Habitat: Mazatlan 

 (Steind.; Gilbert). 



tPristipoma nitidum Steindachner, Ichthyol. Notiz. viii, 5, 1869. Habitat: Ma- 

 zatlan {Steind. ; Gilb.); Panama (G)7Z).). 



^ Pristijyoma Jeuciscus Gunther, Proc. Zool. Soc. Lond. 1864, 147. Habitat: Lower 

 California (Streets); Mazatlan (Gilbert); San JostS (Gthr.), Chiapam (Gthr.), Pan- 

 ama (Gihr. ). Two of our Mazatlan specimens of this species agree with Dr. Gilnther'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 perhaps represent a different species or 

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



II = Microlepidotus Gill = Pristocantharus Gill. 



TPristipoma chalcenm Gthr. Proc. Zool. Soc. Lond. 1864, 14(f = Pristipom a Jcneri 

 Steind. Ichth. Notiz. viii, 1869, 3. Habitat : Mazatlan (Steind. ; Gilb. ) ; Panama (Gthr.; 

 Gilb.). 



