430 CALIFORNIA ACADEMY OF SCIENCES. 64. 
scaly. Belly and lower parts largely naked, a large patch 
ot scales on cheeks; head otherwise naked. 
Bright blue above, with bright reflections, sides bright 
silvery; no golden; a narrow brownish streak not quite 
so wide as pupil from upper part of gill opening to middle 
of base of soft dorsal. Pectoral tipped with black; axil 
of pectoral dusky. Upper fins rather dusky, lower white. 
Dusky on opercle inside and out but without definite 
spot. 
More elongate than Cvtu/a dorsalis, the anterior profile 
more convex, the base of dorsal and anal more elevated, 
the caudal scutes stronger and fewer, the ventrals longer 
though the specimen is larger. Gill-rakers fewer. Pec- 
toral long and falcate, reaching seventh anal ray. Ven- 
trals not short, reaching vent. Caudal moderate. 
One specimen obtained, twenty-six inches long, No. 
£503; L..5.° jr. Unive vis: 
We take great pleasure in naming this interesting fish 
for Mr. Timothy Hopkins, in recognition of his great in- 
terest in scientific research. 
We provisionally admit Cztu/a and f/ynnis as genera 
distinct from A/ectis. No structural characters of im- 
portance distinguish this group, and all these genera are 
merely form variations from Caran. 
g2. Vomer setipinnis (Mitchill). 
Recorded by Dr. Gilbert as common at Mazatlan and 
Panama; no specimens, however, were seen by us. It 
is not unlikely that this species disappears from the coast 
with the end of the rainy season. 
93. Selene cerstedi Liitken. 
Recorded by Dr. Gilbert as frequently found both at 
Mazatlan and Panama. One specimen, sixteen inches 
long, taken by Ygnacio Moreno and sent to us. 
