536 Girard on Fishes of California. 
vexity of the preopercle, two of the spines pointing upwards, 
the third downwards. Upon the inferior branch of the same 
bone there are two minute spines, whilst a third one, di- 
rected forwards, is inserted upon the interopercle. 
The general disposition and structure of the fins is the 
same as in A. lateralis; the origin of the anal, however, is 
opposite the third ray of the second dorsal, and not as deep 
as the latter is high, and the insertion of the ventrals is situ- 
ated upon a vertical line intersecting the middle of the base 
of the pectorals. 
HISIS AWW C 9:1 6; 4,19; V, 8; PR 
A membranous flap may be seen upon the posterior 
superior rim of the orbit. The ogcipital region exhibits 
small spines and tubercles symmetrically disposed, whilst 
the entire surface is spread over with small scales similar 
` to those of the dorsal region, with only this difference, that 
the ciliated or spiny edge is less conspicuous. These 
scales extend over the temporal region, opercular appara- 
tus and interocular region. The dorsal band or zone has 
the same disposition as in A. lateralis, but is broader, 
though composed of a lesser number of scales; the lat- 
ter are more apart, and their edge more strongly ciliated 
or rather spinous. The lateral line is very conspicuous 
and its curve quite depressed, upon the middle of the 
flanks. The ground color is olivaceous, darker above than 
beneath: a series of four black blotches may be observed, 
saddle like, along the dorsal region; the first one across 
the anterior dorsal fin, the second and third over the 
second dorsal, and the fourth upon the peduncle of the tail 
between the two fins. The lower half of the sides, below 
the lateral line, is ocellated with dull white or yellow. The 
inferior surface is’ unicolor. The fins are unicolor, of the 
general hue of the region to which they belong. 
Specimens were collected in Tomales Bay. ; 
Plate XXIV, fig. 5 represents this species, size of life. 
Fig. 6 is a magnified scale. 
