190 CALIFORNIA ACADEMY OF SCIENCES 



the posterior portion of the fin. The third spine is shortened, but still is longer than 

 the fourth. The dorsal formula is III, XXVI+1. In ten specimens examined, the 

 anal fin contained constantly 2 spines and 20 rays, the last two rays being distinct, 

 but closely approximated at the base. 



The lateral line traverses 38 to 40 scales, including the scale which overlies 

 the base of the caudal fin and is sometimes without tube. The arched portion of the 

 lateral line contains 18 to 20 scales, the straight portion 19 to 21. The scales con- 

 stituting the upper portion of the arch are slightly enlarged, and are perforated on 

 the anterior two-fifths only by a tube which opens on the under surface of the scale. 

 At the summit of the arch, a single series of scales intervenes between the lateral 

 line and the base of the dorsal fin. At the beginning of the straight portion of the 

 lateral line, it is separated by five horizontal rows from the base of the dorsal, and 

 by five rows from the base of the anal. 



The second dorsal fin is marked by seven dark bars, which are continued 

 more or less definitely ujwn the back and sides, where every alternate band is more 

 distinct, the fainter ones being often with difficulty distinguished. On the middle of 

 sides, the bands are variously confluent and irregular. The dorsal ocellus occupies 

 the next to the last dorsal bar; and is rarely accompanied by a second smaller ocellus 

 developed in the last dorsal bar (in two out of eighty specimens). No small ocel- 

 lated spots are present on the dorsal fin in advance of the main ocellus. The anterior 

 dorsal fin is without ocellus, and is variously blotched with dusky; the first spine is 

 light, with four narrow cross-bars in the female, plain in the male. The dorsal 

 ocellus is found between the twentieth and twenty-second spines of the second 

 dorsal, occasionally encroaching on the membrane between nineteenth and twen- 

 tieth spines. The anal shows six or seven oblique dark bars, or is more frequently 

 uniform blackish, with a white margin. The caudal, pectorals and ventrals are 

 finely cross-barred in females, plain in males. In females, the lips, mandibles, 

 and lower portion of cheeks and opercles are barred or freckled, these regions plain 

 in the males. The opercle has a dark blotch; a dark shade is usually present below 

 the eye. A dark blotch occupies the basal portion of some of the pectoral rays, this 

 more specialized on the lower rays in females. 



