SCAI.E OBSERVATIONS OF THE SQUETEAGUE AND PIGFISH. 319 



Table 6. — Number op Fish (Cynoscion regalis) Attaining the Different Ages." 



a This table shows that 36 out of orifrinally 38 specimens, or 94.7 per cent survived till the third year (see text, p. 314). 



SUPPLEMENTARY OBSERVATIONS ON THE PIGFISH. ORTHOPRISTIS CHRYSOPTERUS. 



The foregoing investigations on the scales of the squeteague were done during the 

 summer of 191 2. The writer undertook a similar work on the scales of the pigfish in 

 the summer of 1913. Besides bringing out some points in the life history of this fish, 

 the investigation also throws additional light on the nature of the annuli. 



10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 25 27 28 29 30 31 32 



Length in cm. 



Fig. s. — Occurrence of pigfish of different lengths, one year old and upward. The lo cm. class 

 consists of specimens lo to ii cm. in length, etc. 



The scales of the pigfish are similar in type to those of the squeteague, i. e., they 

 are ctenoid, radiate, and characterized by circuli, annuli, etc., and they have the same 

 general shape as those of the squeteague. 



The radii found on the scales of the pigfish are similar to those of the squeteague 

 in structure, but are much more regular in arrangement. Branching is not common 



