SOLEIDAE. 161 
Another specimen, M. C. Z. 29605, 9% inches long from Station 4588, Lat. 
19°, 52’ N.; Long. 106°, 22’ W. 
Another specimen 1 inch long from Station 4714, Lat. 4°, 19'S.; Long. 91°, 
28.5’ W. Dorsal 92; anal 65. 
One specimen 7 inches long from Station 4644, Lat. 2°, 13.3’ S.; Long. 89°, 
42.2’ W. Dorsal 87; anal 68. 
One specimen {@ inches long from Station 4716, Lat. 2°, 18.5’ S.; Long. 
90°, 2.6’ W. Dorsal 87; anal 65. 
One specimen 1 inches long from Station 4592, Lat. 18° 20’ N.; Long. 
103°, 40’ W. 
One specimen, # inch long from Station 4611, Lat. 10° 33’ N.; Long. 88°, 30’ 
W. 
These specimens ranging gradually from } to 11g inches have the eyes sym- 
metrical. The eyes are just as symmetrical in the largest as in the smallest 
and the structure of the specimens superficially shows no great difference in the 
various sizes. Dorsal 86 to 90; anal 65 to 68. These specimens are provision- 
ally identified with this species, mainly because they agree in dorsal fin ray 
counts more closely than with P. constellatus, the other species recorded from 
the Galapagos Islands. They show no color markings or pigmentation. 
SOLEIDAE. 
Achirus mazatlanus (STEINDACHNER). 
Jorvan, Proc. Cal. Acad. Sci., 1895, ser. 2, 5, p. 505. 
Solea mazatlanus STEINDACHNER, Sitzb. Ak. Wiss. Wien, 1869, 60, p. 267. 
One specimen, 43 inches long from Panama Market, October 28, 1904. 
Depth 1.60 in length without caudal; head 3.5; gape 2.95 in head; eye 10.2; 
interorbital 1 in eye; scales about 70; dorsal 57; anal 45; pectoral 5, middle 
ray about twice as long as the others; no pectoral on blind side; two ventrals, 
each consisting of five rays, that on the eyed side on the ridge and continuous 
with anal, somewhat lower on other side and not continuous; upper and lower 
margins of caudal rounded, the rays graduated in length from the base to the 
fifth ray, in each margin, the fourth and fifth rays longest and produced some- 
what beyond the straight terminal margin of the fin; each caudal lobe about 
1.33 in head; middle ray 1.55 in head; longest dorsal ray 1.75 in head; longest 
anal ray 1.7 in head; these longest dorsal and anal rays are posterior to middle 
of body which gives the fish an ovate outline. Developed scales about seventy, 
strongly ctenoid on body, and vertical fins and on both sides of fish. Seales of 
