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. 



D IX, 15 ; A 10 ; C 3, i. 5, 4, i 2 ; Vt, 3 ; P 17. 



A membranous flap may be seen upon the posterior 

 superior rim of the orbit. The occipital 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. 



