DEVELOPMENT AND LIFE HISTORY OF SOME TELEOSTS 
531 
Specimens 25 to SO mm long . — The body has increased still further in depth, which 
is now contained about 2.3 to 2.5 in the length to the base of the caudal. The head 
has become longer, 2.8 to 2.9 in length. The snout is longer aud more pointed, 3.4 
to 3.7 in head; eye longer than snout, 2.6 to 2.9 in head. The mouth is nearly hori- 
zontal, and wdiolly below the lower margin of the eye; maxillary scarcely reaching 
past anterior margin of eye. The lateral line is fully developed. The dorsal spines 
are strong and proportionately about as high as in adults; those of the anal also as 
in adults, the second one notably longer and stronger than the others. The caudal 
fin is slightly forked as in large individuals. The filament on next to the outermost 
ray of the ventral persists, reaching about to the origin of the anal, the outermost ray 
now being developed quite definitely as a spine. The pectoral fin has increased some- 
what in length, its distal margin, instead of being round as in the smaller fish is now 
oblique, the longest rays being in the upper half of the fin, reaching nearly to origin 
of anal. 
Fioube 22 . — Archosargus probaiocephalws. From a specimen 30 mm long. 
The general color of the adults develops early, as already shown. Scarcely any 
changes of note have developed since a length of 18 mm or so was attained. Some 
specimens, though not all, have the ventrals quite black (fig. 22). 
Specimens 50 to 60 mm long . — The fish have continued to increase in depth, and 
are now proportionately as deep as large specimens, depth 2.0 to 2.1 in length to base 
of caudal. The snout has become proportionately longer and more pointed, though 
still notably shorter than in large individuals, equal to or a little longer than the eye, 
2.8 to 3.1 in head; eye 2.8 to 3.3. The incisor teeth now are prominent, and the 
posterior molarial teeth are strong. The pectoral fin has acquired the shape it will 
retain, the fourth ray being longest with the rays below becoming shorter gradually, 
making the lower posterior margin straight and oblique. The ventral filament has 
become proportionately shorter, reaching vent in some specimens and to origin of 
anal in others. 
