DEVELOPMENT AND LI EE HISTORY OF SOME TELEOSTS 
515 
will be required to determine positively the identity of this fish and the smaller 
specimens mentioned. 
Specimens about 17 mm long . — Five specimens of about this size are at hand. 
Development is much further advanced than in the 14-mm fish already described. 
The finlets of the dorsal and anal, eight or nine in number in each fin, are more 
distinctly outlined, yet remain connected by the primitive membrane. The caudal 
fin is now definitely forked. The origin of the anal remains slightly in advance of 
the origin of the second dorsal. 
Pigmentation has increased somewhat. Some specimens are partly silvery in 
color. The black band on the spinous dorsal, very pronounced in younger fish, is 
now broken up into spots (fig. 8). 
Figure 8 . — Scomberomorus maculatus. From a specimen about i7 nun long. 
Figure d.—Scomberomorus maculatuz. From a specimen 22 mm long. 
Specimens 22 to 25 mm long . — Ten specimens of about this size have been studied. 
The body has become rather more slender, the depth now being contained about 
4.5 times in the standard length, and it remains rather strongly compressed. The 
head is long, about 2.5 times in the standard length; the snout is sharply pointed 
and projects strongly beyond the lower jaw, as in younger fish, its length being 
contained about 2.2 times in head. The groove at the articulation of the premaxil- 
laries remains evident. The mouth is very large and the teeth are strong, a pair 
of large canines in the upper jaw being on the part projecting beyond the lower jaw. 
The maxillary reaches somewhat past the middle of the eye and is contained about 
1.4 times in the head. Only two preopercular spines remain. The origin of the 
anal is now only slightly in advance of that of the second dorsal. The rays of these 
fins remain imperfectly developed, though those of the other fins are well formed. 
The finlets are all well developed and separate. The caudal fin is well forked, but 
not as broadly as in the adults. 
Pigmentation has progressed fairly rapidly. The general color is silvery, though 
the back has a brownish cast. The black markings are shown in figure 9. 
