DEVELOPMENT AND LIFE HISTORY OF SOME TELEOSTS 
529 
The differences between this specimen and the smaller one already described are 
not pronounced, except in color. The body has become somewhat more slender, the 
depth now being contained 3.9 times in the length to base of caudal, and the head 
remains short, compressed, 3.7 times in length to base of caudal. The snout also 
remains short, blunt, with a steep profile, only a little shorter than the eye, and is 
contained 3.0 times in the head. The mouth is slightly less oblique than in the smaller 
specimen. The dorsal spines remain short and feeble, though 13, the full number 
(11 to 13) present in the adult, may be counted. The three anal spines now are 
differentiated. However, the spines are more retarded in development than the soft 
rays. The caudal fin (broken now) was described as “slightly concave” in the field 
notes. The ventral fins are quite evident, though minute, being scarcely longer than 
pupil, and are inserted very slightly behind the base of the rather broad well-developed 
pectorals. 
The color of a fresh specimen is described in the field notes in part as, “pale, 
without cross bars, though small dark chromatophores are present along the side of 
body, but not yet forming cross bars.” However, the preserved specimen does show 
an arrangement of chromatophores which suggest a bar between the anterior part of 
the soft dorsal and anal, and another just posterior to these fins (see fig. 19), precisely 
where bars are present in larger fish. The upper margin of the eye in the fresh 
specimen was dark, and black chromatophores were present on the interorbital and 
also along the chest, abdomen, and base of anal. The three obscure dark spots along 
the median vental line in the smaller fish described persist in the larger one, the 
posterior one situated somewhat in advance of the vent having become rather more 
prominent (fig. 19). 
Specimens 10 to 12 mm long . — Several specimens ranging from about 10 to 12 mm 
in length were collected. These fish already resemble the adults so much that they 
are not difficult to identify. 
The body has become deeper, and it is much more robust, the ‘depth being con- 
tained about 3.0 to 3.2 times in the length to base of caudal. The head has become 
notably broader and is now contained 3.0 to 3.25 in the length. The snout remains 
short, rounded, with a steep profile, and much shorter than the eye, its length 4.3 to 4.7 
in head; eye 3.0 in head. The mouth remains small, slightly oblique, and nearly 
terminal, the maxillary reaching about to pupil. The lateral line has made its appear- 
ance, being represented by a few pores anteriorly. The body is almost fully covered 
with scales at a length of 12 mm, though not so indicated in figure 20. The dorsal 
and anal spines are much better developed, but still proportionately much shorter 
than in adults. The caudal fin is distinctly concave, and the ventral fins have 
increased greatly in length, being longer than eye and reaching nearly to vent. 
