592 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



111,32; Lat. 1. 72. L. 10 inches. Coast of California, from Cape Men- 

 docino southward ; very abundant. 



{Hijperprosopon arfjenfeum Gibbons, Proc. Acad. Nat. Sci. Phila. 1854, 105: Hyper- 

 lirosopon arcnafmn Gibbons, 1. c. 125: Huparprosopon argenteus and arciiatus Gill, Proc. 

 Acad. Nat. Sci. Phila. 1862, 27o: Ditrema arcuatutn and Ditrcma megalops Giinther, iv, 

 249: Ennichthys mvfjalops Girard, U. S. Paciiic E. R. Surv. Fish. 197.) 



cc. Ventral fins not black. 



931. A. ag:ass3zi (Gill) J. &. G. 



Greenish olive above; sides bright silvery; 5 or 6 short blackish ver- 

 tical bars on the sides, these sometimes obsolete; a dusky patch above 

 anal and on the front part of anal fin; caudal reddish, dusky at tip; 

 ventrals colorless. Body elliptic ovate, the profile nearly straight from 

 the snout to above the occiput, there forming a slight angle, thence 

 straightish to the base of dorsal ; ventral outline variable, sometimes 

 strongly arched. Mouth small, very oblique, the premaxillary on the 

 level of the middle of the pupil, the maxillary scarcely reaching front 

 of pupil. Eye half longer than the snout. Three rows of scales on 

 cheek. Sixth dorsal spine highest, higher than the soft rays; pectorals 

 falcate. D. IX, 25; A. Ill, 29; Lat. 1. 60. L. 8 inches. Coast of Cal- 

 ifornia; not generally abundant. 



{Hypcrprosopon arcuatus A\ex. Agassiz, Proc. Bost. Soc. Nat. Hist. 1881, 125 (not of 

 Gibbons): Hyperprosopon ayassizii Gill, Proc. Acad. Nat. Sci. Phila. 1862, 276.) 



aa. Profile little depressed above the eyes; month less oblique, the lower jaw not 

 j)rojecting; eye scarcely longer than snout. {Holconotus.*) 



932. A. rliodotci'Bis (Agassiz) J. & G. 



Greenish above; sides silvery, profusely covered with spots and 

 blotches of light orange-brown or coppery red, these mostly in the form 

 of interrupted vertical bars; caudal, anal, and ventral fins bright red- 

 dish, without black spots or markings. Body deeper, more elevated, 

 and less compressed than in the preceding species. Profile nearly 

 straight from snout to dorsal. Mouth oblique, forming an angle of 

 about 45 degrees; premaxillary on the level of the lower edge of pupil; 

 maxillary reaching just past front of pupil. Gill-rakers fewer and 

 stouter than in the preceding species. Head 3f ; depth 2. D. IX or 

 X, 20; A. Ill, 29; Lat. 1. 65. L. 1 foot. Coast of California; not very 

 abundant. 



{flolconotiis rhodoierus L. Agassiz, Amer. Journ. Sci. Arts, 1854, 368: Holconotus rhodo- 

 icrus A. Agassiz, Proc. Bost. Soc. Nat. Hist. 1861, 132: Ennichthys hccrmanni Girard, 

 U. S. Pac. R. R. Surv. Fish. 199: Ditrema rhodoterum Giinther, iv, 250.) 

 flfl. Lov.er liji with a frcnum ; gill-rakers few, short. {Anqihisiichus.) 



*Agassiz, Amer. Jour. Sci. Arts, 1854, 367: tjpe Holconotus rhodoterus. (oAkoS, fur- 

 row; j'fcjro?, back.) 



