93. EMBIOTOCID.E — AMPHISTICHUS. 
591 
not very liigli, the spines slender. Scales small, GO-75 in the course of 
the lateral line. S])ecies 5, difteriug considerably in form and appearance, 
but agreeing in essential characters. («/av''£, double ; (Tzr/o-^ series.) 
* Lower lip without freuum; gill-rakers numerous, long. 
a. Profile depressed or coucave over the eyes; mouth very oblique, the lower 
jaw projecting; eye very large. 
I). Anal fin short, its rays about III, 23. {Hijpocritichthys* Gill.) 
929. A. aisailBS (A. Agassiz,) Jor. & Gilb. 
Silvery ; an inky blotch on the middle of the anal fin and a fainter 
blotch on the spinous dorsal ; front of anal yellow; fins otherwise plain. 
Axil black. Body comparatively elongate, formed much as in Micro- 
metrus frenatus ; upper anterior profile nearly straight, depressed above 
the eyes. Snout sharp. Mouth large, very oblique, the tip of the lower 
jaw on a line with the upper profile of the snout ; maxillary reach- 
ing front of orbit. Dorsal spines high and slender, longer than the 
soft rays, the middle longest. Anal spines small. Caudal fin short, 
not widely forked ; pectorals short and broad, four-fifths the length of 
head. Eye, five fourths the length of snout. Dead 3^ ; depth 2^. D. 
IX, 22 ; A. Ill, 23 ; Lat. 1. 63. L. G inches. San Francisco to Point 
Concepcion ; rather rare ; locally abundant at Santa Cruz. 
{Huperprosopon analis Alex. Agassiz, Proc. Best. Soc. Nat. Hist. 1861, 133: ffi/poorit- 
ichthys analis Gill, Proc. Acad. Nat. Sci. Pbila. 1862, 276: Bitrema a«a?e Giiutber, iv,250.) 
i. Anal fin long, its rays about III, 33. {Hyperprosopon] Gibbous.) 
c. Ventral tins posteriorly black. 
939. A. arciiatus (Gibbous) J. & G. — Wall-eyed Perch; White Perch. 
Bluish black above; sides bright silvery, sometimes faintly barred; 
ventrals with a broad terminal bar of black; caudal and anal edged 
with blackish. Body ovate, strongly compressed. Interorbital space 
rather wide, abruptly depressed at the nape, the profile of the snout 
extending forward at a less angle than that of the back. Snout very 
short, much shorter than the eye. Maxillary scarcely reaching front 
of pupil. Mouth extremely oblique. Eye 2^ in head, larger than in 
any other species. Middle dorsal spines a little higher than the last, 
or than the soft ra^'s; anal low. Head 3i; depth 2 J. D. IX, 27; A. 
*Gill, Proc. Acad. Nat. Sci. Pbila. 1862, 276: type Hyperprosopon analis A. Ag. 
(vTTOKptTo?, deceiver; ixOva, fisb; its appearance (Micrometrus) belying its affinities 
(Holconolus). 
t Gibbous, Daily Placer Times and Transcript, May 18, and in Proc. Acad. Nat. Sci. 
Pbila. 1854, 105: type EyiJeiprosojion argenteus Gibbons, {vnrjp, above; npodooTtov, 
face.) 
